./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/mix011_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:40:53,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:40:53,355 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:40:53,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:40:53,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:40:53,373 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:40:53,374 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:40:53,374 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:40:53,375 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:40:53,375 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:40:53,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:40:53,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:40:53,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:40:53,376 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:40:53,377 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:40:53,377 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:40:53,377 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:40:53,378 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:40:53,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:40:53,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:40:53,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:40:53,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:40:53,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:40:53,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:40:53,380 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:40:53,380 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:40:53,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:40:53,381 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:40:53,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:40:53,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:40:53,382 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:40:53,382 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:40:53,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:40:53,383 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:40:53,383 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:40:53,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:40:53,383 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:40:53,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:40:53,384 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:40:53,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:40:53,384 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:40:53,385 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:40:53,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:40:53,385 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:40:53,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:40:53,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:40:53,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:40:53,634 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:40:53,636 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:40:53,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-04 14:40:53,797 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:40:53,798 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:40:53,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:40:54,830 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:40:55,089 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:40:55,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:40:55,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13547220a/da7c5a9707c045ea9695adbf31cf480e/FLAG15069733b [2024-06-04 14:40:55,117 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13547220a/da7c5a9707c045ea9695adbf31cf480e [2024-06-04 14:40:55,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:40:55,119 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:40:55,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:40:55,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:40:55,124 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:40:55,125 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:40:53" (1/2) ... [2024-06-04 14:40:55,125 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4827b5d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:40:55, skipping insertion in model container [2024-06-04 14:40:55,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:40:53" (1/2) ... [2024-06-04 14:40:55,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@61ac61e3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:40:55, skipping insertion in model container [2024-06-04 14:40:55,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:40:55" (2/2) ... [2024-06-04 14:40:55,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4827b5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55, skipping insertion in model container [2024-06-04 14:40:55,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:40:55" (2/2) ... [2024-06-04 14:40:55,128 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:40:55,199 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:40:55,200 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-04 14:40:55,200 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-04 14:40:55,201 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-04 14:40:55,201 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:40:55,201 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-04 14:40:55,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:40:55,534 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:40:55,544 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:40:55,676 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:40:55,723 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:40:55,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55 WrapperNode [2024-06-04 14:40:55,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:40:55,727 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:40:55,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:40:55,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:40:55,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,759 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,798 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-04 14:40:55,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:40:55,801 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:40:55,801 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:40:55,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:40:55,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,818 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,857 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 14:40:55,857 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,864 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,866 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,867 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,869 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:40:55,873 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:40:55,875 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:40:55,875 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:40:55,875 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (1/1) ... [2024-06-04 14:40:55,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:40:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:40:55,896 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 14:40:55,919 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 14:40:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:40:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:40:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:40:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:40:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:40:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:40:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:40:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:40:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:40:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:40:55,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:40:55,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:40:55,945 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 14:40:56,040 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:40:56,042 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:40:56,415 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:40:56,415 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:40:56,602 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:40:56,602 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:40:56,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:40:56 BoogieIcfgContainer [2024-06-04 14:40:56,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:40:56,607 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:40:56,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:40:56,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:40:56,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:40:53" (1/4) ... [2024-06-04 14:40:56,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de49406 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:40:56, skipping insertion in model container [2024-06-04 14:40:56,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:40:55" (2/4) ... [2024-06-04 14:40:56,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de49406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:40:56, skipping insertion in model container [2024-06-04 14:40:56,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:40:55" (3/4) ... [2024-06-04 14:40:56,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de49406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:40:56, skipping insertion in model container [2024-06-04 14:40:56,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:40:56" (4/4) ... [2024-06-04 14:40:56,612 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-04 14:40:56,625 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:40:56,625 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:40:56,625 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:40:56,656 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:40:56,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:40:56,702 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-04 14:40:56,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:40:56,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:40:56,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:40:56,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-04 14:40:56,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:40:56,725 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;@5994a9ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:40:56,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:40:56,730 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:40:56,730 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:40:56,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:40:56,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:56,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:40:56,731 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 14:40:56,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash -969480644, now seen corresponding path program 1 times [2024-06-04 14:40:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:56,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138003209] [2024-06-04 14:40:56,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:56,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:57,685 INFO 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 14:40:57,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:57,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138003209] [2024-06-04 14:40:57,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138003209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:57,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:57,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:40:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544109016] [2024-06-04 14:40:57,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:57,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:40:57,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:40:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:40:57,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:40:57,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:40:57,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:57,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:40:57,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:58,245 INFO L124 PetriNetUnfolderBase]: 1659/2576 cut-off events. [2024-06-04 14:40:58,246 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 14:40:58,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5142 conditions, 2576 events. 1659/2576 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12911 event pairs, 1184 based on Foata normal form. 1/2507 useless extension candidates. Maximal degree in co-relation 5127. Up to 2465 conditions per place. [2024-06-04 14:40:58,263 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 14:40:58,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 183 flow [2024-06-04 14:40:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:40:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:40:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-04 14:40:58,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:40:58,275 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 78 transitions. [2024-06-04 14:40:58,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 183 flow [2024-06-04 14:40:58,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:40:58,282 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-04 14:40:58,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 14:40:58,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-04 14:40:58,286 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-04 14:40:58,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:40:58,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:58,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:58,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:40:58,287 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 14:40:58,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash 337041307, now seen corresponding path program 1 times [2024-06-04 14:40:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269914410] [2024-06-04 14:40:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:40:59,071 INFO 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 14:40:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:40:59,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269914410] [2024-06-04 14:40:59,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269914410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:40:59,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:40:59,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:40:59,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258367444] [2024-06-04 14:40:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:40:59,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:40:59,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:40:59,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:40:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:40:59,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:40:59,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:40:59,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:40:59,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:40:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:40:59,465 INFO L124 PetriNetUnfolderBase]: 1653/2577 cut-off events. [2024-06-04 14:40:59,465 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-04 14:40:59,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5768 conditions, 2577 events. 1653/2577 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12997 event pairs, 1038 based on Foata normal form. 3/2553 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-04 14:40:59,476 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:40:59,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-04 14:40:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:40:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:40:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 14:40:59,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:40:59,478 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-04 14:40:59,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-04 14:40:59,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:40:59,480 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-04 14:40:59,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-04 14:40:59,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-04 14:40:59,481 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-04 14:40:59,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:40:59,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:40:59,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:40:59,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:40:59,482 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 14:40:59,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:40:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1858347141, now seen corresponding path program 1 times [2024-06-04 14:40:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:40:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132139014] [2024-06-04 14:40:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:40:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:40:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:00,375 INFO 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 14:41:00,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:00,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132139014] [2024-06-04 14:41:00,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132139014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:00,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:00,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:41:00,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445937103] [2024-06-04 14:41:00,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:00,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:41:00,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:41:00,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:41:00,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:41:00,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 14:41:00,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:00,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:41:00,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:00,787 INFO L124 PetriNetUnfolderBase]: 1661/2603 cut-off events. [2024-06-04 14:41:00,787 INFO L125 PetriNetUnfolderBase]: For 1388/1388 co-relation queries the response was YES. [2024-06-04 14:41:00,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6431 conditions, 2603 events. 1661/2603 cut-off events. For 1388/1388 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13188 event pairs, 812 based on Foata normal form. 5/2584 useless extension candidates. Maximal degree in co-relation 6414. Up to 2387 conditions per place. [2024-06-04 14:41:00,798 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-04 14:41:00,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 404 flow [2024-06-04 14:41:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:41:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:41:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 14:41:00,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:41:00,801 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-04 14:41:00,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 404 flow [2024-06-04 14:41:00,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 390 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:41:00,803 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-04 14:41:00,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-04 14:41:00,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-04 14:41:00,804 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-04 14:41:00,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 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 14:41:00,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:00,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:00,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:41:00,805 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 14:41:00,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1774187770, now seen corresponding path program 1 times [2024-06-04 14:41:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:00,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350983909] [2024-06-04 14:41:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:02,133 INFO 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 14:41:02,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:02,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350983909] [2024-06-04 14:41:02,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350983909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:02,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:02,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:41:02,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651202473] [2024-06-04 14:41:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:02,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:41:02,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:41:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:41:02,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:41:02,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:02,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:02,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:41:02,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:02,644 INFO L124 PetriNetUnfolderBase]: 1669/2615 cut-off events. [2024-06-04 14:41:02,645 INFO L125 PetriNetUnfolderBase]: For 3180/3183 co-relation queries the response was YES. [2024-06-04 14:41:02,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7550 conditions, 2615 events. 1669/2615 cut-off events. For 3180/3183 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13270 event pairs, 666 based on Foata normal form. 7/2598 useless extension candidates. Maximal degree in co-relation 7530. Up to 2373 conditions per place. [2024-06-04 14:41:02,658 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 62 selfloop transitions, 20 changer transitions 0/88 dead transitions. [2024-06-04 14:41:02,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 531 flow [2024-06-04 14:41:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:41:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:41:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 14:41:02,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-04 14:41:02,660 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 153 transitions. [2024-06-04 14:41:02,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 531 flow [2024-06-04 14:41:02,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 523 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 14:41:02,663 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 314 flow [2024-06-04 14:41:02,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=314, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-04 14:41:02,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-04 14:41:02,664 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 314 flow [2024-06-04 14:41:02,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:02,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:02,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:02,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:41:02,665 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 14:41:02,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash -834752700, now seen corresponding path program 1 times [2024-06-04 14:41:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:02,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196768090] [2024-06-04 14:41:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:03,944 INFO 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 14:41:03,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:03,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196768090] [2024-06-04 14:41:03,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196768090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:03,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:03,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054405836] [2024-06-04 14:41:03,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:03,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:03,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:03,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:04,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:41:04,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 314 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:04,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:04,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:41:04,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:04,540 INFO L124 PetriNetUnfolderBase]: 1681/2635 cut-off events. [2024-06-04 14:41:04,540 INFO L125 PetriNetUnfolderBase]: For 5024/5027 co-relation queries the response was YES. [2024-06-04 14:41:04,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8421 conditions, 2635 events. 1681/2635 cut-off events. For 5024/5027 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13372 event pairs, 502 based on Foata normal form. 12/2623 useless extension candidates. Maximal degree in co-relation 8398. Up to 2341 conditions per place. [2024-06-04 14:41:04,555 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 66 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-04 14:41:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 632 flow [2024-06-04 14:41:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 14:41:04,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 14:41:04,560 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 314 flow. Second operand 7 states and 172 transitions. [2024-06-04 14:41:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 632 flow [2024-06-04 14:41:04,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 583 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:04,565 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-04 14:41:04,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-04 14:41:04,566 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-04 14:41:04,566 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-04 14:41:04,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:04,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:04,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:04,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:41:04,567 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 14:41:04,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1527270789, now seen corresponding path program 1 times [2024-06-04 14:41:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382522354] [2024-06-04 14:41:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:05,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382522354] [2024-06-04 14:41:05,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382522354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:05,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:05,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:41:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907344147] [2024-06-04 14:41:05,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:05,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:41:05,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:41:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:41:05,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:05,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 14:41:05,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:05,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:05,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:05,628 INFO L124 PetriNetUnfolderBase]: 1676/2622 cut-off events. [2024-06-04 14:41:05,628 INFO L125 PetriNetUnfolderBase]: For 6848/6848 co-relation queries the response was YES. [2024-06-04 14:41:05,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 2622 events. 1676/2622 cut-off events. For 6848/6848 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13277 event pairs, 659 based on Foata normal form. 2/2600 useless extension candidates. Maximal degree in co-relation 8917. Up to 2484 conditions per place. [2024-06-04 14:41:05,643 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 55 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-04 14:41:05,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 495 flow [2024-06-04 14:41:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:41:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:41:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-04 14:41:05,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-04 14:41:05,644 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 5 states and 102 transitions. [2024-06-04 14:41:05,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 495 flow [2024-06-04 14:41:05,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 431 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:05,649 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 301 flow [2024-06-04 14:41:05,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-04 14:41:05,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-04 14:41:05,650 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 301 flow [2024-06-04 14:41:05,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 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 14:41:05,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:05,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:05,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:41:05,651 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 14:41:05,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash -112774731, now seen corresponding path program 1 times [2024-06-04 14:41:05,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:05,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330105273] [2024-06-04 14:41:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:06,292 INFO 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 14:41:06,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330105273] [2024-06-04 14:41:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330105273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:06,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:06,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839487511] [2024-06-04 14:41:06,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:06,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:06,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:06,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:06,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:06,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:06,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:06,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:06,920 INFO L124 PetriNetUnfolderBase]: 1967/3062 cut-off events. [2024-06-04 14:41:06,921 INFO L125 PetriNetUnfolderBase]: For 9000/9000 co-relation queries the response was YES. [2024-06-04 14:41:06,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10287 conditions, 3062 events. 1967/3062 cut-off events. For 9000/9000 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15354 event pairs, 795 based on Foata normal form. 2/3061 useless extension candidates. Maximal degree in co-relation 10261. Up to 2896 conditions per place. [2024-06-04 14:41:06,940 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-04 14:41:06,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 501 flow [2024-06-04 14:41:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:41:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:41:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-04 14:41:06,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-04 14:41:06,942 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 301 flow. Second operand 6 states and 115 transitions. [2024-06-04 14:41:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 501 flow [2024-06-04 14:41:06,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 479 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:06,947 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 335 flow [2024-06-04 14:41:06,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-06-04 14:41:06,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-04 14:41:06,949 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 335 flow [2024-06-04 14:41:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:06,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:06,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:06,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:41:06,949 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 14:41:06,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:06,950 INFO L85 PathProgramCache]: Analyzing trace with hash -584068164, now seen corresponding path program 1 times [2024-06-04 14:41:06,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:06,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886469353] [2024-06-04 14:41:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:06,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:07,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:07,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886469353] [2024-06-04 14:41:07,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886469353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:07,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:07,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885262053] [2024-06-04 14:41:07,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:07,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:07,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:07,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:07,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:07,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 335 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:07,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:07,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:08,269 INFO L124 PetriNetUnfolderBase]: 1856/2951 cut-off events. [2024-06-04 14:41:08,270 INFO L125 PetriNetUnfolderBase]: For 11476/11482 co-relation queries the response was YES. [2024-06-04 14:41:08,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 2951 events. 1856/2951 cut-off events. For 11476/11482 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15273 event pairs, 727 based on Foata normal form. 8/2955 useless extension candidates. Maximal degree in co-relation 10542. Up to 2663 conditions per place. [2024-06-04 14:41:08,284 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-04 14:41:08,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 84 transitions, 589 flow [2024-06-04 14:41:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:41:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:41:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-04 14:41:08,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-04 14:41:08,288 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 335 flow. Second operand 6 states and 129 transitions. [2024-06-04 14:41:08,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 84 transitions, 589 flow [2024-06-04 14:41:08,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 557 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:08,295 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 375 flow [2024-06-04 14:41:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-04 14:41:08,297 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-04 14:41:08,297 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 375 flow [2024-06-04 14:41:08,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:08,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:08,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:08,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:41:08,298 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 14:41:08,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1171629722, now seen corresponding path program 2 times [2024-06-04 14:41:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:08,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805674746] [2024-06-04 14:41:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:08,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805674746] [2024-06-04 14:41:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805674746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:08,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:08,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:08,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626049566] [2024-06-04 14:41:08,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:08,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:08,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:08,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:08,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:09,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:09,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 375 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:09,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:09,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:09,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:09,509 INFO L124 PetriNetUnfolderBase]: 1841/2925 cut-off events. [2024-06-04 14:41:09,509 INFO L125 PetriNetUnfolderBase]: For 13354/13354 co-relation queries the response was YES. [2024-06-04 14:41:09,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10801 conditions, 2925 events. 1841/2925 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15100 event pairs, 723 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 10774. Up to 2704 conditions per place. [2024-06-04 14:41:09,526 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-04 14:41:09,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 79 transitions, 557 flow [2024-06-04 14:41:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:41:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:41:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-04 14:41:09,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 14:41:09,527 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 375 flow. Second operand 6 states and 120 transitions. [2024-06-04 14:41:09,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 79 transitions, 557 flow [2024-06-04 14:41:09,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:09,535 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 376 flow [2024-06-04 14:41:09,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-04 14:41:09,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-04 14:41:09,536 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 376 flow [2024-06-04 14:41:09,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:09,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:09,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:09,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:41:09,536 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 14:41:09,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:09,540 INFO L85 PathProgramCache]: Analyzing trace with hash 798952248, now seen corresponding path program 1 times [2024-06-04 14:41:09,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:09,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234080358] [2024-06-04 14:41:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:10,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:10,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234080358] [2024-06-04 14:41:10,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234080358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:10,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:10,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:10,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811029149] [2024-06-04 14:41:10,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:10,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:10,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:10,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:10,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:10,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:10,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:10,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:11,014 INFO L124 PetriNetUnfolderBase]: 1948/3011 cut-off events. [2024-06-04 14:41:11,015 INFO L125 PetriNetUnfolderBase]: For 15615/15615 co-relation queries the response was YES. [2024-06-04 14:41:11,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11345 conditions, 3011 events. 1948/3011 cut-off events. For 15615/15615 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14913 event pairs, 753 based on Foata normal form. 4/3012 useless extension candidates. Maximal degree in co-relation 11317. Up to 2848 conditions per place. [2024-06-04 14:41:11,065 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 68 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-04 14:41:11,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 87 transitions, 614 flow [2024-06-04 14:41:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 14:41:11,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:41:11,076 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 376 flow. Second operand 7 states and 133 transitions. [2024-06-04 14:41:11,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 87 transitions, 614 flow [2024-06-04 14:41:11,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 567 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:11,084 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 395 flow [2024-06-04 14:41:11,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-04 14:41:11,086 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-04 14:41:11,086 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 395 flow [2024-06-04 14:41:11,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:11,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:11,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:41:11,086 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 14:41:11,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1179660042, now seen corresponding path program 1 times [2024-06-04 14:41:11,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:11,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362953551] [2024-06-04 14:41:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:11,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:11,901 INFO 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 14:41:11,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:11,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362953551] [2024-06-04 14:41:11,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362953551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:11,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:11,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:11,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617202132] [2024-06-04 14:41:11,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:11,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:11,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:11,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:11,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:11,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:12,463 INFO L124 PetriNetUnfolderBase]: 1970/3078 cut-off events. [2024-06-04 14:41:12,463 INFO L125 PetriNetUnfolderBase]: For 18554/18560 co-relation queries the response was YES. [2024-06-04 14:41:12,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12101 conditions, 3078 events. 1970/3078 cut-off events. For 18554/18560 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15550 event pairs, 740 based on Foata normal form. 5/3079 useless extension candidates. Maximal degree in co-relation 12072. Up to 2770 conditions per place. [2024-06-04 14:41:12,479 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-04 14:41:12,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 743 flow [2024-06-04 14:41:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-04 14:41:12,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-04 14:41:12,481 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 395 flow. Second operand 7 states and 144 transitions. [2024-06-04 14:41:12,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 743 flow [2024-06-04 14:41:12,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 99 transitions, 701 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:12,494 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 476 flow [2024-06-04 14:41:12,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-04 14:41:12,495 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-04 14:41:12,495 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 476 flow [2024-06-04 14:41:12,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:12,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:12,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:12,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:41:12,495 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 14:41:12,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:12,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1960784596, now seen corresponding path program 2 times [2024-06-04 14:41:12,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:12,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579712122] [2024-06-04 14:41:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:12,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579712122] [2024-06-04 14:41:13,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579712122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:13,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720070434] [2024-06-04 14:41:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:13,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:13,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:13,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:13,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:13,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 476 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:13,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:13,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:13,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:13,746 INFO L124 PetriNetUnfolderBase]: 1981/3093 cut-off events. [2024-06-04 14:41:13,746 INFO L125 PetriNetUnfolderBase]: For 22356/22356 co-relation queries the response was YES. [2024-06-04 14:41:13,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12966 conditions, 3093 events. 1981/3093 cut-off events. For 22356/22356 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15574 event pairs, 732 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 12936. Up to 2885 conditions per place. [2024-06-04 14:41:13,762 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 77 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-06-04 14:41:13,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 828 flow [2024-06-04 14:41:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 14:41:13,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-04 14:41:13,763 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 476 flow. Second operand 7 states and 136 transitions. [2024-06-04 14:41:13,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 828 flow [2024-06-04 14:41:13,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 790 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:13,776 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 554 flow [2024-06-04 14:41:13,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-04 14:41:13,776 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-04 14:41:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 554 flow [2024-06-04 14:41:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:13,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:13,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:41:13,777 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 14:41:13,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash -921594178, now seen corresponding path program 3 times [2024-06-04 14:41:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:13,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120164341] [2024-06-04 14:41:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:14,561 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 14:41:14,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120164341] [2024-06-04 14:41:14,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120164341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:14,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:14,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:14,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047347952] [2024-06-04 14:41:14,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:14,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:14,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 554 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:14,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:14,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:14,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:15,210 INFO L124 PetriNetUnfolderBase]: 1976/3086 cut-off events. [2024-06-04 14:41:15,210 INFO L125 PetriNetUnfolderBase]: For 25850/25850 co-relation queries the response was YES. [2024-06-04 14:41:15,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13344 conditions, 3086 events. 1976/3086 cut-off events. For 25850/25850 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15603 event pairs, 732 based on Foata normal form. 2/3085 useless extension candidates. Maximal degree in co-relation 13312. Up to 2898 conditions per place. [2024-06-04 14:41:15,223 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-04 14:41:15,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 99 transitions, 790 flow [2024-06-04 14:41:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 14:41:15,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:41:15,225 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 554 flow. Second operand 7 states and 132 transitions. [2024-06-04 14:41:15,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 99 transitions, 790 flow [2024-06-04 14:41:15,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 99 transitions, 738 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:15,238 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 538 flow [2024-06-04 14:41:15,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=538, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-04 14:41:15,239 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-04 14:41:15,239 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 538 flow [2024-06-04 14:41:15,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:15,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:15,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:15,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:41:15,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:15,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2045730303, now seen corresponding path program 1 times [2024-06-04 14:41:15,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:15,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474315359] [2024-06-04 14:41:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:15,860 INFO 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 14:41:15,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:15,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474315359] [2024-06-04 14:41:15,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474315359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:15,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:15,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:41:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5612916] [2024-06-04 14:41:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:41:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:41:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:41:15,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:41:15,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:15,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:15,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:41:15,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:16,405 INFO L124 PetriNetUnfolderBase]: 2486/3721 cut-off events. [2024-06-04 14:41:16,405 INFO L125 PetriNetUnfolderBase]: For 37962/37962 co-relation queries the response was YES. [2024-06-04 14:41:16,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16703 conditions, 3721 events. 2486/3721 cut-off events. For 37962/37962 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17869 event pairs, 990 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 16669. Up to 3628 conditions per place. [2024-06-04 14:41:16,426 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 73 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-06-04 14:41:16,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 92 transitions, 760 flow [2024-06-04 14:41:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:41:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:41:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-04 14:41:16,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-04 14:41:16,428 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 538 flow. Second operand 6 states and 100 transitions. [2024-06-04 14:41:16,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 92 transitions, 760 flow [2024-06-04 14:41:16,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 92 transitions, 722 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:16,448 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 575 flow [2024-06-04 14:41:16,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-04 14:41:16,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-04 14:41:16,449 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 575 flow [2024-06-04 14:41:16,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:16,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:16,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:16,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:41:16,449 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 14:41:16,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:16,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2081430743, now seen corresponding path program 1 times [2024-06-04 14:41:16,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:16,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554400303] [2024-06-04 14:41:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:16,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:17,457 INFO 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 14:41:17,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:17,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554400303] [2024-06-04 14:41:17,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554400303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:17,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:17,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:17,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466885] [2024-06-04 14:41:17,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:17,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:17,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:17,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:17,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:17,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:17,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:17,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:17,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:18,053 INFO L124 PetriNetUnfolderBase]: 1964/3080 cut-off events. [2024-06-04 14:41:18,053 INFO L125 PetriNetUnfolderBase]: For 37665/37668 co-relation queries the response was YES. [2024-06-04 14:41:18,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14673 conditions, 3080 events. 1964/3080 cut-off events. For 37665/37668 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15873 event pairs, 720 based on Foata normal form. 4/3080 useless extension candidates. Maximal degree in co-relation 14637. Up to 2716 conditions per place. [2024-06-04 14:41:18,069 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 27 changer transitions 0/116 dead transitions. [2024-06-04 14:41:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 889 flow [2024-06-04 14:41:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-04 14:41:18,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-04 14:41:18,071 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 575 flow. Second operand 8 states and 167 transitions. [2024-06-04 14:41:18,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 889 flow [2024-06-04 14:41:18,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 857 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:18,086 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 642 flow [2024-06-04 14:41:18,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-04 14:41:18,086 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-04 14:41:18,086 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 642 flow [2024-06-04 14:41:18,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:18,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:18,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:41:18,087 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 14:41:18,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1351260827, now seen corresponding path program 1 times [2024-06-04 14:41:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:18,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086468352] [2024-06-04 14:41:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086468352] [2024-06-04 14:41:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086468352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724768376] [2024-06-04 14:41:19,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:19,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:19,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:19,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 642 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:19,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:19,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:19,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:19,741 INFO L124 PetriNetUnfolderBase]: 2151/3306 cut-off events. [2024-06-04 14:41:19,741 INFO L125 PetriNetUnfolderBase]: For 44274/44277 co-relation queries the response was YES. [2024-06-04 14:41:19,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 3306 events. 2151/3306 cut-off events. For 44274/44277 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16590 event pairs, 689 based on Foata normal form. 8/3310 useless extension candidates. Maximal degree in co-relation 16391. Up to 2852 conditions per place. [2024-06-04 14:41:19,756 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 85 selfloop transitions, 37 changer transitions 0/128 dead transitions. [2024-06-04 14:41:19,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1108 flow [2024-06-04 14:41:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-04 14:41:19,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-04 14:41:19,759 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 642 flow. Second operand 8 states and 166 transitions. [2024-06-04 14:41:19,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1108 flow [2024-06-04 14:41:19,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 1035 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:19,812 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 757 flow [2024-06-04 14:41:19,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=757, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-04 14:41:19,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-04 14:41:19,813 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 757 flow [2024-06-04 14:41:19,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:19,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:19,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:19,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:41:19,815 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 14:41:19,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2085240178, now seen corresponding path program 1 times [2024-06-04 14:41:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:19,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621309486] [2024-06-04 14:41:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:19,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:20,727 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 14:41:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621309486] [2024-06-04 14:41:20,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621309486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:20,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:20,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464762345] [2024-06-04 14:41:20,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:20,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:20,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:20,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:20,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 757 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:20,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:20,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:20,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:21,309 INFO L124 PetriNetUnfolderBase]: 2162/3322 cut-off events. [2024-06-04 14:41:21,309 INFO L125 PetriNetUnfolderBase]: For 50185/50188 co-relation queries the response was YES. [2024-06-04 14:41:21,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17578 conditions, 3322 events. 2162/3322 cut-off events. For 50185/50188 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16699 event pairs, 720 based on Foata normal form. 2/3320 useless extension candidates. Maximal degree in co-relation 17539. Up to 2993 conditions per place. [2024-06-04 14:41:21,328 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-04 14:41:21,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 127 transitions, 1169 flow [2024-06-04 14:41:21,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-04 14:41:21,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-04 14:41:21,330 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 757 flow. Second operand 7 states and 147 transitions. [2024-06-04 14:41:21,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 127 transitions, 1169 flow [2024-06-04 14:41:21,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 1124 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:21,355 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 832 flow [2024-06-04 14:41:21,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-04 14:41:21,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-04 14:41:21,355 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 832 flow [2024-06-04 14:41:21,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:21,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:21,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:21,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:41:21,356 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 14:41:21,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1351260610, now seen corresponding path program 2 times [2024-06-04 14:41:21,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:21,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851121060] [2024-06-04 14:41:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:21,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:22,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:22,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851121060] [2024-06-04 14:41:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851121060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:22,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285272342] [2024-06-04 14:41:22,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:22,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:22,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 832 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:22,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:22,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:22,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:22,890 INFO L124 PetriNetUnfolderBase]: 2173/3338 cut-off events. [2024-06-04 14:41:22,891 INFO L125 PetriNetUnfolderBase]: For 55656/55659 co-relation queries the response was YES. [2024-06-04 14:41:22,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18002 conditions, 3338 events. 2173/3338 cut-off events. For 55656/55659 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16804 event pairs, 720 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 17960. Up to 3005 conditions per place. [2024-06-04 14:41:22,908 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 84 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-04 14:41:22,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 127 transitions, 1244 flow [2024-06-04 14:41:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-04 14:41:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-04 14:41:22,910 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 832 flow. Second operand 7 states and 143 transitions. [2024-06-04 14:41:22,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 127 transitions, 1244 flow [2024-06-04 14:41:22,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1129 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:22,938 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 844 flow [2024-06-04 14:41:22,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-04 14:41:22,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-04 14:41:22,938 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 844 flow [2024-06-04 14:41:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:22,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:22,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:22,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:41:22,939 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 14:41:22,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 654781945, now seen corresponding path program 2 times [2024-06-04 14:41:22,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:22,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091997623] [2024-06-04 14:41:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:23,791 INFO 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 14:41:23,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:23,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091997623] [2024-06-04 14:41:23,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091997623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:23,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:23,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:23,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994099451] [2024-06-04 14:41:23,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:23,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:23,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:23,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:24,466 INFO L124 PetriNetUnfolderBase]: 2195/3369 cut-off events. [2024-06-04 14:41:24,466 INFO L125 PetriNetUnfolderBase]: For 61437/61437 co-relation queries the response was YES. [2024-06-04 14:41:24,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18447 conditions, 3369 events. 2195/3369 cut-off events. For 61437/61437 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16909 event pairs, 712 based on Foata normal form. 4/3370 useless extension candidates. Maximal degree in co-relation 18404. Up to 3095 conditions per place. [2024-06-04 14:41:24,487 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 103 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2024-06-04 14:41:24,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1322 flow [2024-06-04 14:41:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 14:41:24,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-04 14:41:24,495 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 844 flow. Second operand 8 states and 157 transitions. [2024-06-04 14:41:24,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1322 flow [2024-06-04 14:41:24,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1253 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:24,521 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 923 flow [2024-06-04 14:41:24,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-04 14:41:24,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 53 predicate places. [2024-06-04 14:41:24,522 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 923 flow [2024-06-04 14:41:24,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:24,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:24,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:24,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:41:24,522 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 14:41:24,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1005992937, now seen corresponding path program 3 times [2024-06-04 14:41:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:24,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177243970] [2024-06-04 14:41:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:24,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:25,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:25,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177243970] [2024-06-04 14:41:25,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177243970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:25,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:25,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:25,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305230811] [2024-06-04 14:41:25,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:25,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:25,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:25,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:25,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:25,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 923 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:25,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:25,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:25,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:26,015 INFO L124 PetriNetUnfolderBase]: 2217/3406 cut-off events. [2024-06-04 14:41:26,015 INFO L125 PetriNetUnfolderBase]: For 68459/68459 co-relation queries the response was YES. [2024-06-04 14:41:26,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19078 conditions, 3406 events. 2217/3406 cut-off events. For 68459/68459 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17164 event pairs, 712 based on Foata normal form. 4/3407 useless extension candidates. Maximal degree in co-relation 19034. Up to 3183 conditions per place. [2024-06-04 14:41:26,032 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 18 changer transitions 0/136 dead transitions. [2024-06-04 14:41:26,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 136 transitions, 1289 flow [2024-06-04 14:41:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:41:26,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:41:26,033 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 923 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:41:26,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 136 transitions, 1289 flow [2024-06-04 14:41:26,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1235 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:26,062 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 965 flow [2024-06-04 14:41:26,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=965, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-04 14:41:26,063 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-04 14:41:26,063 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 965 flow [2024-06-04 14:41:26,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:26,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:26,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:26,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:41:26,064 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 14:41:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1006259847, now seen corresponding path program 4 times [2024-06-04 14:41:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:26,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417361592] [2024-06-04 14:41:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:26,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:26,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417361592] [2024-06-04 14:41:26,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417361592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:26,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:26,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:26,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326849458] [2024-06-04 14:41:26,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:26,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:26,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:26,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:26,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:26,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 965 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:26,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:26,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:26,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:27,344 INFO L124 PetriNetUnfolderBase]: 2207/3392 cut-off events. [2024-06-04 14:41:27,344 INFO L125 PetriNetUnfolderBase]: For 72719/72719 co-relation queries the response was YES. [2024-06-04 14:41:27,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19111 conditions, 3392 events. 2207/3392 cut-off events. For 72719/72719 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17078 event pairs, 710 based on Foata normal form. 4/3393 useless extension candidates. Maximal degree in co-relation 19066. Up to 3142 conditions per place. [2024-06-04 14:41:27,366 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 108 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-04 14:41:27,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 137 transitions, 1291 flow [2024-06-04 14:41:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:41:27,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:41:27,367 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 965 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:41:27,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 137 transitions, 1291 flow [2024-06-04 14:41:27,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 137 transitions, 1203 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:27,409 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 931 flow [2024-06-04 14:41:27,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-06-04 14:41:27,409 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-04 14:41:27,410 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 931 flow [2024-06-04 14:41:27,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:27,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:27,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:41:27,410 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 14:41:27,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1006260064, now seen corresponding path program 3 times [2024-06-04 14:41:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24190471] [2024-06-04 14:41:27,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:27,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:28,138 INFO 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 14:41:28,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:28,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24190471] [2024-06-04 14:41:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24190471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:28,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:41:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945577323] [2024-06-04 14:41:28,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:28,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:41:28,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:41:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:41:28,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:28,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 931 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:28,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:28,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:28,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:28,747 INFO L124 PetriNetUnfolderBase]: 2202/3386 cut-off events. [2024-06-04 14:41:28,747 INFO L125 PetriNetUnfolderBase]: For 77408/77411 co-relation queries the response was YES. [2024-06-04 14:41:28,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19242 conditions, 3386 events. 2202/3386 cut-off events. For 77408/77411 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17037 event pairs, 714 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 19196. Up to 3171 conditions per place. [2024-06-04 14:41:28,768 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-04 14:41:28,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 131 transitions, 1227 flow [2024-06-04 14:41:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:28,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 14:41:28,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:41:28,770 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 931 flow. Second operand 7 states and 133 transitions. [2024-06-04 14:41:28,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 131 transitions, 1227 flow [2024-06-04 14:41:28,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1128 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 14:41:28,807 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 874 flow [2024-06-04 14:41:28,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-04 14:41:28,808 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-04 14:41:28,808 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 874 flow [2024-06-04 14:41:28,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:28,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:28,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:28,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:41:28,809 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:28,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:28,809 INFO L85 PathProgramCache]: Analyzing trace with hash 957716127, now seen corresponding path program 1 times [2024-06-04 14:41:28,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:28,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116796421] [2024-06-04 14:41:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:28,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:29,437 INFO 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 14:41:29,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:29,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116796421] [2024-06-04 14:41:29,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116796421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:29,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:29,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:29,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067932912] [2024-06-04 14:41:29,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:29,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:29,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:29,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:29,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:41:29,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:29,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:29,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:41:29,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:30,225 INFO L124 PetriNetUnfolderBase]: 2629/3935 cut-off events. [2024-06-04 14:41:30,225 INFO L125 PetriNetUnfolderBase]: For 94230/94230 co-relation queries the response was YES. [2024-06-04 14:41:30,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22111 conditions, 3935 events. 2629/3935 cut-off events. For 94230/94230 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18789 event pairs, 916 based on Foata normal form. 3/3935 useless extension candidates. Maximal degree in co-relation 22065. Up to 3828 conditions per place. [2024-06-04 14:41:30,253 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 102 selfloop transitions, 13 changer transitions 0/126 dead transitions. [2024-06-04 14:41:30,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 126 transitions, 1156 flow [2024-06-04 14:41:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:41:30,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-04 14:41:30,269 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 874 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:41:30,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 126 transitions, 1156 flow [2024-06-04 14:41:30,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 126 transitions, 1088 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:41:30,344 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 872 flow [2024-06-04 14:41:30,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=872, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-04 14:41:30,345 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-04 14:41:30,345 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 872 flow [2024-06-04 14:41:30,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:30,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:30,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:30,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:41:30,345 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 14:41:30,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1178918507, now seen corresponding path program 1 times [2024-06-04 14:41:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:30,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263012353] [2024-06-04 14:41:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:30,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:31,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:31,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263012353] [2024-06-04 14:41:31,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263012353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:31,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:31,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584320210] [2024-06-04 14:41:31,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:31,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:31,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 14:41:31,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:31,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:31,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:32,137 INFO L124 PetriNetUnfolderBase]: 2101/3297 cut-off events. [2024-06-04 14:41:32,137 INFO L125 PetriNetUnfolderBase]: For 89222/89225 co-relation queries the response was YES. [2024-06-04 14:41:32,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3297 events. 2101/3297 cut-off events. For 89222/89225 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17092 event pairs, 488 based on Foata normal form. 6/3299 useless extension candidates. Maximal degree in co-relation 19474. Up to 2812 conditions per place. [2024-06-04 14:41:32,159 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 108 selfloop transitions, 30 changer transitions 0/152 dead transitions. [2024-06-04 14:41:32,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1384 flow [2024-06-04 14:41:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 14:41:32,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-04 14:41:32,160 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 872 flow. Second operand 8 states and 169 transitions. [2024-06-04 14:41:32,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1384 flow [2024-06-04 14:41:32,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 152 transitions, 1340 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:32,211 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 963 flow [2024-06-04 14:41:32,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=963, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-04 14:41:32,212 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-04 14:41:32,212 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 963 flow [2024-06-04 14:41:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 14:41:32,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:32,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:32,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:41:32,213 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 14:41:32,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:32,213 INFO L85 PathProgramCache]: Analyzing trace with hash 99845175, now seen corresponding path program 1 times [2024-06-04 14:41:32,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:32,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113392108] [2024-06-04 14:41:32,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:33,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:33,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113392108] [2024-06-04 14:41:33,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113392108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:33,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:33,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:33,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449447360] [2024-06-04 14:41:33,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:33,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:33,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:33,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 963 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:33,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:33,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:33,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:34,075 INFO L124 PetriNetUnfolderBase]: 2226/3424 cut-off events. [2024-06-04 14:41:34,075 INFO L125 PetriNetUnfolderBase]: For 96343/96346 co-relation queries the response was YES. [2024-06-04 14:41:34,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3424 events. 2226/3424 cut-off events. For 96343/96346 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17289 event pairs, 662 based on Foata normal form. 2/3422 useless extension candidates. Maximal degree in co-relation 20576. Up to 3008 conditions per place. [2024-06-04 14:41:34,099 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 109 selfloop transitions, 49 changer transitions 0/164 dead transitions. [2024-06-04 14:41:34,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 164 transitions, 1543 flow [2024-06-04 14:41:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:41:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:41:34,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-04 14:41:34,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 14:41:34,101 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 963 flow. Second operand 10 states and 200 transitions. [2024-06-04 14:41:34,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 164 transitions, 1543 flow [2024-06-04 14:41:34,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 164 transitions, 1478 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:34,149 INFO L231 Difference]: Finished difference. Result has 112 places, 126 transitions, 1083 flow [2024-06-04 14:41:34,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1083, PETRI_PLACES=112, PETRI_TRANSITIONS=126} [2024-06-04 14:41:34,150 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-04 14:41:34,150 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 126 transitions, 1083 flow [2024-06-04 14:41:34,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:34,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:34,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:34,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:41:34,151 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 14:41:34,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1178858057, now seen corresponding path program 2 times [2024-06-04 14:41:34,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:34,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878707987] [2024-06-04 14:41:34,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:34,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:35,151 INFO 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 14:41:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:35,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878707987] [2024-06-04 14:41:35,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878707987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:35,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:35,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:35,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964130344] [2024-06-04 14:41:35,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:35,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:35,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:35,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:35,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:35,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 1083 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 14:41:35,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:35,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:35,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:35,816 INFO L124 PetriNetUnfolderBase]: 2148/3366 cut-off events. [2024-06-04 14:41:35,816 INFO L125 PetriNetUnfolderBase]: For 105944/105947 co-relation queries the response was YES. [2024-06-04 14:41:35,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21015 conditions, 3366 events. 2148/3366 cut-off events. For 105944/105947 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17442 event pairs, 623 based on Foata normal form. 6/3368 useless extension candidates. Maximal degree in co-relation 20965. Up to 2944 conditions per place. [2024-06-04 14:41:35,838 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 115 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-06-04 14:41:35,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1499 flow [2024-06-04 14:41:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-04 14:41:35,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-04 14:41:35,840 INFO L175 Difference]: Start difference. First operand has 112 places, 126 transitions, 1083 flow. Second operand 8 states and 166 transitions. [2024-06-04 14:41:35,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1499 flow [2024-06-04 14:41:35,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1406 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:35,900 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1109 flow [2024-06-04 14:41:35,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1109, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-04 14:41:35,901 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-04 14:41:35,901 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1109 flow [2024-06-04 14:41:35,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 14:41:35,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:35,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:35,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:41:35,902 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 14:41:35,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash 102641561, now seen corresponding path program 3 times [2024-06-04 14:41:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072571627] [2024-06-04 14:41:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:37,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:37,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072571627] [2024-06-04 14:41:37,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072571627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:37,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:37,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:37,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587679842] [2024-06-04 14:41:37,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:37,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:37,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:37,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:37,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:37,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:41:37,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1109 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 14:41:37,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:37,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:41:37,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:37,736 INFO L124 PetriNetUnfolderBase]: 2141/3353 cut-off events. [2024-06-04 14:41:37,736 INFO L125 PetriNetUnfolderBase]: For 112528/112531 co-relation queries the response was YES. [2024-06-04 14:41:37,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21212 conditions, 3353 events. 2141/3353 cut-off events. For 112528/112531 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17367 event pairs, 622 based on Foata normal form. 6/3355 useless extension candidates. Maximal degree in co-relation 21160. Up to 2966 conditions per place. [2024-06-04 14:41:37,759 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-04 14:41:37,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 157 transitions, 1459 flow [2024-06-04 14:41:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-04 14:41:37,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-04 14:41:37,761 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1109 flow. Second operand 8 states and 163 transitions. [2024-06-04 14:41:37,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 157 transitions, 1459 flow [2024-06-04 14:41:37,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1381 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:37,814 INFO L231 Difference]: Finished difference. Result has 118 places, 131 transitions, 1088 flow [2024-06-04 14:41:37,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1088, PETRI_PLACES=118, PETRI_TRANSITIONS=131} [2024-06-04 14:41:37,815 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-04 14:41:37,815 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 131 transitions, 1088 flow [2024-06-04 14:41:37,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 14:41:37,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:37,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:37,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:41:37,816 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 14:41:37,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2145408719, now seen corresponding path program 2 times [2024-06-04 14:41:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:37,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495959078] [2024-06-04 14:41:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:37,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:38,824 INFO 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 14:41:38,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:38,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495959078] [2024-06-04 14:41:38,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495959078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:38,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:38,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:38,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165493564] [2024-06-04 14:41:38,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:38,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:38,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:38,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 131 transitions, 1088 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:38,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:38,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:38,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:39,477 INFO L124 PetriNetUnfolderBase]: 2257/3469 cut-off events. [2024-06-04 14:41:39,478 INFO L125 PetriNetUnfolderBase]: For 119302/119305 co-relation queries the response was YES. [2024-06-04 14:41:39,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22015 conditions, 3469 events. 2257/3469 cut-off events. For 119302/119305 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17538 event pairs, 660 based on Foata normal form. 2/3467 useless extension candidates. Maximal degree in co-relation 21962. Up to 3079 conditions per place. [2024-06-04 14:41:39,501 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 112 selfloop transitions, 49 changer transitions 0/167 dead transitions. [2024-06-04 14:41:39,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1638 flow [2024-06-04 14:41:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-04 14:41:39,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-04 14:41:39,504 INFO L175 Difference]: Start difference. First operand has 118 places, 131 transitions, 1088 flow. Second operand 8 states and 169 transitions. [2024-06-04 14:41:39,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1638 flow [2024-06-04 14:41:39,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1560 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:41:39,568 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 1150 flow [2024-06-04 14:41:39,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1150, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-04 14:41:39,573 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 73 predicate places. [2024-06-04 14:41:39,573 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 1150 flow [2024-06-04 14:41:39,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:39,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:39,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:39,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:41:39,574 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 14:41:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1060585927, now seen corresponding path program 1 times [2024-06-04 14:41:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690750497] [2024-06-04 14:41:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:39,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:40,465 INFO 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 14:41:40,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690750497] [2024-06-04 14:41:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690750497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:40,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:40,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:40,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898163370] [2024-06-04 14:41:40,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:40,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:40,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:40,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:40,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 1150 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:40,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:40,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:40,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:41,246 INFO L124 PetriNetUnfolderBase]: 2311/3552 cut-off events. [2024-06-04 14:41:41,247 INFO L125 PetriNetUnfolderBase]: For 130230/130233 co-relation queries the response was YES. [2024-06-04 14:41:41,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 3552 events. 2311/3552 cut-off events. For 130230/130233 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17967 event pairs, 634 based on Foata normal form. 4/3552 useless extension candidates. Maximal degree in co-relation 22819. Up to 3006 conditions per place. [2024-06-04 14:41:41,274 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 111 selfloop transitions, 55 changer transitions 0/172 dead transitions. [2024-06-04 14:41:41,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 172 transitions, 1864 flow [2024-06-04 14:41:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 14:41:41,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-04 14:41:41,277 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 1150 flow. Second operand 8 states and 168 transitions. [2024-06-04 14:41:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 172 transitions, 1864 flow [2024-06-04 14:41:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 172 transitions, 1746 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:41,351 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1231 flow [2024-06-04 14:41:41,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1231, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-04 14:41:41,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-04 14:41:41,352 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1231 flow [2024-06-04 14:41:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:41:41,353 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 14:41:41,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash 218110671, now seen corresponding path program 2 times [2024-06-04 14:41:41,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:41,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416843307] [2024-06-04 14:41:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:41,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:42,271 INFO 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 14:41:42,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:42,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416843307] [2024-06-04 14:41:42,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416843307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:42,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:42,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112920984] [2024-06-04 14:41:42,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:42,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:42,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:42,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:42,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:42,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:43,005 INFO L124 PetriNetUnfolderBase]: 2333/3589 cut-off events. [2024-06-04 14:41:43,006 INFO L125 PetriNetUnfolderBase]: For 139410/139413 co-relation queries the response was YES. [2024-06-04 14:41:43,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23426 conditions, 3589 events. 2333/3589 cut-off events. For 139410/139413 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18260 event pairs, 634 based on Foata normal form. 4/3589 useless extension candidates. Maximal degree in co-relation 23371. Up to 3025 conditions per place. [2024-06-04 14:41:43,029 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-04 14:41:43,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1931 flow [2024-06-04 14:41:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 14:41:43,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-04 14:41:43,031 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1231 flow. Second operand 8 states and 170 transitions. [2024-06-04 14:41:43,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1931 flow [2024-06-04 14:41:43,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1817 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:43,123 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1285 flow [2024-06-04 14:41:43,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1285, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-04 14:41:43,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-04 14:41:43,124 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1285 flow [2024-06-04 14:41:43,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:43,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:43,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:41:43,124 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:43,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash 217937505, now seen corresponding path program 3 times [2024-06-04 14:41:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:43,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942618649] [2024-06-04 14:41:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:43,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:44,093 INFO 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 14:41:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942618649] [2024-06-04 14:41:44,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942618649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:44,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:44,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:44,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231531117] [2024-06-04 14:41:44,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:44,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:44,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:44,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:44,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:44,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:44,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1285 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:44,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:44,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:44,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:44,731 INFO L124 PetriNetUnfolderBase]: 2344/3605 cut-off events. [2024-06-04 14:41:44,731 INFO L125 PetriNetUnfolderBase]: For 147618/147621 co-relation queries the response was YES. [2024-06-04 14:41:44,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23745 conditions, 3605 events. 2344/3605 cut-off events. For 147618/147621 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18335 event pairs, 667 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 23689. Up to 3250 conditions per place. [2024-06-04 14:41:44,756 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 125 selfloop transitions, 43 changer transitions 0/174 dead transitions. [2024-06-04 14:41:44,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 174 transitions, 1731 flow [2024-06-04 14:41:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-04 14:41:44,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-04 14:41:44,757 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1285 flow. Second operand 8 states and 162 transitions. [2024-06-04 14:41:44,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 174 transitions, 1731 flow [2024-06-04 14:41:44,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1621 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:44,841 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1309 flow [2024-06-04 14:41:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1309, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-04 14:41:44,842 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-04 14:41:44,842 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1309 flow [2024-06-04 14:41:44,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:44,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:44,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:44,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:41:44,842 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 14:41:44,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1060765417, now seen corresponding path program 3 times [2024-06-04 14:41:44,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:44,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450156934] [2024-06-04 14:41:44,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:44,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:45,573 INFO 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 14:41:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450156934] [2024-06-04 14:41:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450156934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:45,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:45,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:45,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094679187] [2024-06-04 14:41:45,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:45,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:45,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:45,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:45,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:45,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:45,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:45,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:45,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:46,301 INFO L124 PetriNetUnfolderBase]: 2334/3591 cut-off events. [2024-06-04 14:41:46,301 INFO L125 PetriNetUnfolderBase]: For 155345/155348 co-relation queries the response was YES. [2024-06-04 14:41:46,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23763 conditions, 3591 events. 2334/3591 cut-off events. For 155345/155348 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18265 event pairs, 625 based on Foata normal form. 4/3591 useless extension candidates. Maximal degree in co-relation 23706. Up to 3033 conditions per place. [2024-06-04 14:41:46,326 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 111 selfloop transitions, 62 changer transitions 0/179 dead transitions. [2024-06-04 14:41:46,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 1867 flow [2024-06-04 14:41:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-04 14:41:46,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-04 14:41:46,328 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1309 flow. Second operand 8 states and 170 transitions. [2024-06-04 14:41:46,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 1867 flow [2024-06-04 14:41:46,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 179 transitions, 1747 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:46,426 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1321 flow [2024-06-04 14:41:46,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-04 14:41:46,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-04 14:41:46,426 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1321 flow [2024-06-04 14:41:46,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:46,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:46,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:46,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:41:46,427 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 14:41:46,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 218110485, now seen corresponding path program 4 times [2024-06-04 14:41:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:46,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671243273] [2024-06-04 14:41:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:47,396 INFO 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 14:41:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:47,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671243273] [2024-06-04 14:41:47,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671243273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:47,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150292910] [2024-06-04 14:41:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:47,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:47,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:47,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:47,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:47,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:48,088 INFO L124 PetriNetUnfolderBase]: 2345/3607 cut-off events. [2024-06-04 14:41:48,089 INFO L125 PetriNetUnfolderBase]: For 163953/163956 co-relation queries the response was YES. [2024-06-04 14:41:48,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24255 conditions, 3607 events. 2345/3607 cut-off events. For 163953/163956 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18365 event pairs, 665 based on Foata normal form. 2/3605 useless extension candidates. Maximal degree in co-relation 24197. Up to 3252 conditions per place. [2024-06-04 14:41:48,120 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 128 selfloop transitions, 40 changer transitions 0/174 dead transitions. [2024-06-04 14:41:48,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 174 transitions, 1763 flow [2024-06-04 14:41:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:48,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 14:41:48,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-04 14:41:48,121 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1321 flow. Second operand 8 states and 158 transitions. [2024-06-04 14:41:48,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 174 transitions, 1763 flow [2024-06-04 14:41:48,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1585 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:41:48,214 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1277 flow [2024-06-04 14:41:48,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1277, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-04 14:41:48,214 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-04 14:41:48,215 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1277 flow [2024-06-04 14:41:48,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:48,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:48,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:41:48,215 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:48,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash -388918226, now seen corresponding path program 1 times [2024-06-04 14:41:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:48,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894955026] [2024-06-04 14:41:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:41:48,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:48,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894955026] [2024-06-04 14:41:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894955026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:48,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303333479] [2024-06-04 14:41:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:48,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:48,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:48,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:41:48,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1277 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:48,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:48,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:41:48,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:49,582 INFO L124 PetriNetUnfolderBase]: 2836/4241 cut-off events. [2024-06-04 14:41:49,582 INFO L125 PetriNetUnfolderBase]: For 196747/196747 co-relation queries the response was YES. [2024-06-04 14:41:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28113 conditions, 4241 events. 2836/4241 cut-off events. For 196747/196747 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20500 event pairs, 867 based on Foata normal form. 1/4239 useless extension candidates. Maximal degree in co-relation 28054. Up to 4094 conditions per place. [2024-06-04 14:41:49,612 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 137 selfloop transitions, 18 changer transitions 0/171 dead transitions. [2024-06-04 14:41:49,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 171 transitions, 1778 flow [2024-06-04 14:41:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:41:49,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-04 14:41:49,613 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1277 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:41:49,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 171 transitions, 1778 flow [2024-06-04 14:41:49,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 171 transitions, 1672 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 14:41:49,748 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1324 flow [2024-06-04 14:41:49,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2024-06-04 14:41:49,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-04 14:41:49,749 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1324 flow [2024-06-04 14:41:49,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:49,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:49,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:49,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:41:49,749 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 14:41:49,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1129289485, now seen corresponding path program 5 times [2024-06-04 14:41:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:49,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054771761] [2024-06-04 14:41:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:49,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:50,613 INFO 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 14:41:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:50,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054771761] [2024-06-04 14:41:50,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054771761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:50,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:50,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44991806] [2024-06-04 14:41:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:50,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:50,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:50,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:50,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:50,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:51,341 INFO L124 PetriNetUnfolderBase]: 2380/3653 cut-off events. [2024-06-04 14:41:51,341 INFO L125 PetriNetUnfolderBase]: For 182905/182908 co-relation queries the response was YES. [2024-06-04 14:41:51,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25139 conditions, 3653 events. 2380/3653 cut-off events. For 182905/182908 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 18406 event pairs, 661 based on Foata normal form. 4/3653 useless extension candidates. Maximal degree in co-relation 25078. Up to 3413 conditions per place. [2024-06-04 14:41:51,368 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 20 changer transitions 0/180 dead transitions. [2024-06-04 14:41:51,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 180 transitions, 1724 flow [2024-06-04 14:41:51,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:41:51,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:41:51,370 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1324 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:41:51,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 180 transitions, 1724 flow [2024-06-04 14:41:51,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 180 transitions, 1669 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 14:41:51,462 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1317 flow [2024-06-04 14:41:51,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1317, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-06-04 14:41:51,462 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-04 14:41:51,462 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1317 flow [2024-06-04 14:41:51,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:51,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:51,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:51,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:41:51,463 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 14:41:51,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash -948693639, now seen corresponding path program 4 times [2024-06-04 14:41:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:51,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535387769] [2024-06-04 14:41:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:51,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:52,348 INFO 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 14:41:52,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:52,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535387769] [2024-06-04 14:41:52,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535387769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:52,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:52,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055308831] [2024-06-04 14:41:52,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:52,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:52,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:52,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1317 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:52,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:52,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:52,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:53,074 INFO L124 PetriNetUnfolderBase]: 2434/3736 cut-off events. [2024-06-04 14:41:53,074 INFO L125 PetriNetUnfolderBase]: For 197083/197086 co-relation queries the response was YES. [2024-06-04 14:41:53,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25979 conditions, 3736 events. 2434/3736 cut-off events. For 197083/197086 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18941 event pairs, 663 based on Foata normal form. 6/3738 useless extension candidates. Maximal degree in co-relation 25916. Up to 3379 conditions per place. [2024-06-04 14:41:53,102 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 153 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-04 14:41:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 193 transitions, 2109 flow [2024-06-04 14:41:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 14:41:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-04 14:41:53,104 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1317 flow. Second operand 8 states and 161 transitions. [2024-06-04 14:41:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 193 transitions, 2109 flow [2024-06-04 14:41:53,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 193 transitions, 2038 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:41:53,226 INFO L231 Difference]: Finished difference. Result has 137 places, 164 transitions, 1396 flow [2024-06-04 14:41:53,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1396, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2024-06-04 14:41:53,226 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-04 14:41:53,227 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1396 flow [2024-06-04 14:41:53,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:53,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:53,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:41:53,227 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 14:41:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -940419429, now seen corresponding path program 5 times [2024-06-04 14:41:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392528459] [2024-06-04 14:41:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:53,948 INFO 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 14:41:53,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:53,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392528459] [2024-06-04 14:41:53,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392528459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:53,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:53,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568691696] [2024-06-04 14:41:53,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:53,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:53,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:54,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:54,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1396 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:54,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:54,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:54,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:54,692 INFO L124 PetriNetUnfolderBase]: 2424/3722 cut-off events. [2024-06-04 14:41:54,693 INFO L125 PetriNetUnfolderBase]: For 205479/205482 co-relation queries the response was YES. [2024-06-04 14:41:54,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26123 conditions, 3722 events. 2424/3722 cut-off events. For 205479/205482 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 18842 event pairs, 661 based on Foata normal form. 6/3724 useless extension candidates. Maximal degree in co-relation 26059. Up to 3454 conditions per place. [2024-06-04 14:41:54,723 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 160 selfloop transitions, 20 changer transitions 0/188 dead transitions. [2024-06-04 14:41:54,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 188 transitions, 1820 flow [2024-06-04 14:41:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 14:41:54,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:41:54,725 INFO L175 Difference]: Start difference. First operand has 137 places, 164 transitions, 1396 flow. Second operand 8 states and 152 transitions. [2024-06-04 14:41:54,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 188 transitions, 1820 flow [2024-06-04 14:41:54,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 1697 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 14:41:54,834 INFO L231 Difference]: Finished difference. Result has 140 places, 164 transitions, 1321 flow [2024-06-04 14:41:54,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=140, PETRI_TRANSITIONS=164} [2024-06-04 14:41:54,834 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-04 14:41:54,834 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 164 transitions, 1321 flow [2024-06-04 14:41:54,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:54,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:54,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:54,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:41:54,835 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 14:41:54,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:54,835 INFO L85 PathProgramCache]: Analyzing trace with hash 546809225, now seen corresponding path program 6 times [2024-06-04 14:41:54,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:54,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688175310] [2024-06-04 14:41:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:55,673 INFO 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 14:41:55,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688175310] [2024-06-04 14:41:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688175310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:55,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:41:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952282610] [2024-06-04 14:41:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:41:55,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:41:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:41:55,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:41:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 164 transitions, 1321 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:55,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:55,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:41:55,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:56,472 INFO L124 PetriNetUnfolderBase]: 2414/3708 cut-off events. [2024-06-04 14:41:56,472 INFO L125 PetriNetUnfolderBase]: For 212858/212861 co-relation queries the response was YES. [2024-06-04 14:41:56,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3708 events. 2414/3708 cut-off events. For 212858/212861 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18777 event pairs, 654 based on Foata normal form. 6/3710 useless extension candidates. Maximal degree in co-relation 25969. Up to 3363 conditions per place. [2024-06-04 14:41:56,502 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 148 selfloop transitions, 33 changer transitions 0/189 dead transitions. [2024-06-04 14:41:56,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 189 transitions, 1751 flow [2024-06-04 14:41:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:41:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:41:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:41:56,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:41:56,503 INFO L175 Difference]: Start difference. First operand has 140 places, 164 transitions, 1321 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:41:56,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 189 transitions, 1751 flow [2024-06-04 14:41:56,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 1683 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:41:56,643 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1327 flow [2024-06-04 14:41:56,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-04 14:41:56,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-04 14:41:56,644 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1327 flow [2024-06-04 14:41:56,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:56,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:56,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:56,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:41:56,645 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:56,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash -375585746, now seen corresponding path program 2 times [2024-06-04 14:41:56,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:56,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652696972] [2024-06-04 14:41:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:56,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:57,348 INFO 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 14:41:57,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:57,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652696972] [2024-06-04 14:41:57,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652696972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:57,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:57,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:57,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365534835] [2024-06-04 14:41:57,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:57,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:57,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:57,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:57,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:57,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:41:57,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1327 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:57,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:57,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:41:57,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:58,047 INFO L124 PetriNetUnfolderBase]: 2879/4305 cut-off events. [2024-06-04 14:41:58,047 INFO L125 PetriNetUnfolderBase]: For 250432/250432 co-relation queries the response was YES. [2024-06-04 14:41:58,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29964 conditions, 4305 events. 2879/4305 cut-off events. For 250432/250432 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20781 event pairs, 882 based on Foata normal form. 1/4303 useless extension candidates. Maximal degree in co-relation 29898. Up to 4175 conditions per place. [2024-06-04 14:41:58,134 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 144 selfloop transitions, 12 changer transitions 0/172 dead transitions. [2024-06-04 14:41:58,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 172 transitions, 1659 flow [2024-06-04 14:41:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:41:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:41:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-04 14:41:58,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39015151515151514 [2024-06-04 14:41:58,135 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1327 flow. Second operand 6 states and 103 transitions. [2024-06-04 14:41:58,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 172 transitions, 1659 flow [2024-06-04 14:41:58,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 172 transitions, 1537 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 14:41:58,274 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1235 flow [2024-06-04 14:41:58,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1235, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-06-04 14:41:58,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-04 14:41:58,275 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1235 flow [2024-06-04 14:41:58,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:58,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:58,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:58,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:41:58,275 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:58,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash -153776176, now seen corresponding path program 3 times [2024-06-04 14:41:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:58,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577480736] [2024-06-04 14:41:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:41:58,821 INFO 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 14:41:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:41:58,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577480736] [2024-06-04 14:41:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577480736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:41:58,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:41:58,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:41:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654122678] [2024-06-04 14:41:58,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:41:58,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:41:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:41:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:41:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:41:58,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:41:58,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1235 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:58,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:41:58,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:41:58,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:41:59,590 INFO L124 PetriNetUnfolderBase]: 2888/4319 cut-off events. [2024-06-04 14:41:59,590 INFO L125 PetriNetUnfolderBase]: For 261007/261007 co-relation queries the response was YES. [2024-06-04 14:41:59,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30019 conditions, 4319 events. 2888/4319 cut-off events. For 261007/261007 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20883 event pairs, 882 based on Foata normal form. 1/4317 useless extension candidates. Maximal degree in co-relation 29952. Up to 4157 conditions per place. [2024-06-04 14:41:59,618 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 146 selfloop transitions, 31 changer transitions 0/193 dead transitions. [2024-06-04 14:41:59,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 193 transitions, 1736 flow [2024-06-04 14:41:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:41:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:41:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 14:41:59,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-04 14:41:59,620 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1235 flow. Second operand 7 states and 128 transitions. [2024-06-04 14:41:59,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 193 transitions, 1736 flow [2024-06-04 14:41:59,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 193 transitions, 1710 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 14:41:59,828 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1416 flow [2024-06-04 14:41:59,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1416, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-04 14:41:59,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-04 14:41:59,828 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1416 flow [2024-06-04 14:41:59,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:41:59,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:41:59,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:41:59,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:41:59,829 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:41:59,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:41:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash -383198354, now seen corresponding path program 1 times [2024-06-04 14:41:59,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:41:59,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498021521] [2024-06-04 14:41:59,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:41:59,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:41:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:00,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498021521] [2024-06-04 14:42:00,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498021521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:00,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:00,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:42:00,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139835754] [2024-06-04 14:42:00,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:00,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:42:00,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:42:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:42:00,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:00,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1416 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:00,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:00,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:01,314 INFO L124 PetriNetUnfolderBase]: 2893/4326 cut-off events. [2024-06-04 14:42:01,315 INFO L125 PetriNetUnfolderBase]: For 273164/273164 co-relation queries the response was YES. [2024-06-04 14:42:01,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30964 conditions, 4326 events. 2893/4326 cut-off events. For 273164/273164 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20891 event pairs, 883 based on Foata normal form. 1/4324 useless extension candidates. Maximal degree in co-relation 30894. Up to 4182 conditions per place. [2024-06-04 14:42:01,348 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 160 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-04 14:42:01,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 194 transitions, 1954 flow [2024-06-04 14:42:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 14:42:01,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:42:01,349 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1416 flow. Second operand 7 states and 119 transitions. [2024-06-04 14:42:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 194 transitions, 1954 flow [2024-06-04 14:42:01,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 194 transitions, 1894 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:01,491 INFO L231 Difference]: Finished difference. Result has 148 places, 182 transitions, 1472 flow [2024-06-04 14:42:01,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1472, PETRI_PLACES=148, PETRI_TRANSITIONS=182} [2024-06-04 14:42:01,492 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-04 14:42:01,492 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 182 transitions, 1472 flow [2024-06-04 14:42:01,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:01,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:01,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:42:01,492 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:01,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1067878492, now seen corresponding path program 2 times [2024-06-04 14:42:01,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:01,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372574640] [2024-06-04 14:42:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:02,279 INFO 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 14:42:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372574640] [2024-06-04 14:42:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372574640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:02,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:02,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:02,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021258488] [2024-06-04 14:42:02,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:02,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:02,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:02,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:02,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:02,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 182 transitions, 1472 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:02,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:02,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:02,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:03,143 INFO L124 PetriNetUnfolderBase]: 2890/4323 cut-off events. [2024-06-04 14:42:03,143 INFO L125 PetriNetUnfolderBase]: For 286147/286150 co-relation queries the response was YES. [2024-06-04 14:42:03,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31554 conditions, 4323 events. 2890/4323 cut-off events. For 286147/286150 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20942 event pairs, 886 based on Foata normal form. 3/4322 useless extension candidates. Maximal degree in co-relation 31483. Up to 4179 conditions per place. [2024-06-04 14:42:03,175 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 156 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2024-06-04 14:42:03,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 190 transitions, 1842 flow [2024-06-04 14:42:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:42:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37337662337662336 [2024-06-04 14:42:03,176 INFO L175 Difference]: Start difference. First operand has 148 places, 182 transitions, 1472 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:42:03,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 190 transitions, 1842 flow [2024-06-04 14:42:03,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 190 transitions, 1779 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:03,404 INFO L231 Difference]: Finished difference. Result has 152 places, 182 transitions, 1451 flow [2024-06-04 14:42:03,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1451, PETRI_PLACES=152, PETRI_TRANSITIONS=182} [2024-06-04 14:42:03,405 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-04 14:42:03,405 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 182 transitions, 1451 flow [2024-06-04 14:42:03,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:03,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:03,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:42:03,406 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 14:42:03,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -940111599, now seen corresponding path program 1 times [2024-06-04 14:42:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688467083] [2024-06-04 14:42:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:03,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:04,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688467083] [2024-06-04 14:42:04,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688467083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:04,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:04,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:04,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359394911] [2024-06-04 14:42:04,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:04,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:04,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:04,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 182 transitions, 1451 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:04,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:04,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:04,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:05,488 INFO L124 PetriNetUnfolderBase]: 2822/4250 cut-off events. [2024-06-04 14:42:05,488 INFO L125 PetriNetUnfolderBase]: For 299198/299198 co-relation queries the response was YES. [2024-06-04 14:42:05,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31389 conditions, 4250 events. 2822/4250 cut-off events. For 299198/299198 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 20719 event pairs, 789 based on Foata normal form. 4/4251 useless extension candidates. Maximal degree in co-relation 31316. Up to 4024 conditions per place. [2024-06-04 14:42:05,521 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 181 selfloop transitions, 22 changer transitions 0/214 dead transitions. [2024-06-04 14:42:05,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 214 transitions, 1995 flow [2024-06-04 14:42:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:42:05,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-04 14:42:05,523 INFO L175 Difference]: Start difference. First operand has 152 places, 182 transitions, 1451 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:42:05,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 214 transitions, 1995 flow [2024-06-04 14:42:05,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 214 transitions, 1942 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:42:05,765 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 1517 flow [2024-06-04 14:42:05,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1517, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-06-04 14:42:05,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-04 14:42:05,766 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 1517 flow [2024-06-04 14:42:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:05,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:05,767 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 14:42:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:42:05,767 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 14:42:05,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1201643083, now seen corresponding path program 1 times [2024-06-04 14:42:05,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:05,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116986928] [2024-06-04 14:42:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:06,655 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 14:42:06,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:06,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116986928] [2024-06-04 14:42:06,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116986928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:06,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:06,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:06,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277862382] [2024-06-04 14:42:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:06,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:06,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:06,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:06,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 1517 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:06,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:06,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:06,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:07,530 INFO L124 PetriNetUnfolderBase]: 2683/4101 cut-off events. [2024-06-04 14:42:07,530 INFO L125 PetriNetUnfolderBase]: For 307194/307197 co-relation queries the response was YES. [2024-06-04 14:42:07,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31234 conditions, 4101 events. 2683/4101 cut-off events. For 307194/307197 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20713 event pairs, 590 based on Foata normal form. 4/4096 useless extension candidates. Maximal degree in co-relation 31160. Up to 3398 conditions per place. [2024-06-04 14:42:07,570 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 150 selfloop transitions, 65 changer transitions 0/228 dead transitions. [2024-06-04 14:42:07,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2289 flow [2024-06-04 14:42:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 14:42:07,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-04 14:42:07,571 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 1517 flow. Second operand 9 states and 183 transitions. [2024-06-04 14:42:07,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2289 flow [2024-06-04 14:42:07,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 2214 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:42:07,796 INFO L231 Difference]: Finished difference. Result has 158 places, 191 transitions, 1655 flow [2024-06-04 14:42:07,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=158, PETRI_TRANSITIONS=191} [2024-06-04 14:42:07,797 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-04 14:42:07,797 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 191 transitions, 1655 flow [2024-06-04 14:42:07,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:07,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:07,798 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 14:42:07,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:42:07,798 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:07,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:07,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1976121419, now seen corresponding path program 2 times [2024-06-04 14:42:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608976345] [2024-06-04 14:42:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:08,830 INFO 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 14:42:08,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608976345] [2024-06-04 14:42:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608976345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:08,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:08,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555876860] [2024-06-04 14:42:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:08,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:09,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:09,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 191 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:09,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:09,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:09,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:09,781 INFO L124 PetriNetUnfolderBase]: 2737/4184 cut-off events. [2024-06-04 14:42:09,781 INFO L125 PetriNetUnfolderBase]: For 326144/326147 co-relation queries the response was YES. [2024-06-04 14:42:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32454 conditions, 4184 events. 2737/4184 cut-off events. For 326144/326147 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 21226 event pairs, 739 based on Foata normal form. 4/4179 useless extension candidates. Maximal degree in co-relation 32379. Up to 3615 conditions per place. [2024-06-04 14:42:09,818 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 156 selfloop transitions, 65 changer transitions 0/234 dead transitions. [2024-06-04 14:42:09,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 234 transitions, 2470 flow [2024-06-04 14:42:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-04 14:42:09,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-04 14:42:09,821 INFO L175 Difference]: Start difference. First operand has 158 places, 191 transitions, 1655 flow. Second operand 9 states and 183 transitions. [2024-06-04 14:42:09,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 234 transitions, 2470 flow [2024-06-04 14:42:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2330 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:10,080 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 1757 flow [2024-06-04 14:42:10,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1757, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2024-06-04 14:42:10,082 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-04 14:42:10,082 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 1757 flow [2024-06-04 14:42:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:10,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:10,082 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 14:42:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:42:10,083 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:10,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1199765258, now seen corresponding path program 1 times [2024-06-04 14:42:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:10,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311900476] [2024-06-04 14:42:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:11,227 INFO 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 14:42:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311900476] [2024-06-04 14:42:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311900476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:11,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:11,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404679454] [2024-06-04 14:42:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:11,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:11,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:11,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 1757 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:11,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:11,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:11,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:12,320 INFO L124 PetriNetUnfolderBase]: 2782/4247 cut-off events. [2024-06-04 14:42:12,321 INFO L125 PetriNetUnfolderBase]: For 343036/343043 co-relation queries the response was YES. [2024-06-04 14:42:12,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33215 conditions, 4247 events. 2782/4247 cut-off events. For 343036/343043 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21507 event pairs, 690 based on Foata normal form. 4/4245 useless extension candidates. Maximal degree in co-relation 33138. Up to 3373 conditions per place. [2024-06-04 14:42:12,359 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 144 selfloop transitions, 97 changer transitions 0/254 dead transitions. [2024-06-04 14:42:12,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 254 transitions, 2651 flow [2024-06-04 14:42:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:42:12,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:42:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-04 14:42:12,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 14:42:12,361 INFO L175 Difference]: Start difference. First operand has 162 places, 198 transitions, 1757 flow. Second operand 12 states and 242 transitions. [2024-06-04 14:42:12,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 254 transitions, 2651 flow [2024-06-04 14:42:12,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 254 transitions, 2592 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:12,615 INFO L231 Difference]: Finished difference. Result has 171 places, 204 transitions, 1996 flow [2024-06-04 14:42:12,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1996, PETRI_PLACES=171, PETRI_TRANSITIONS=204} [2024-06-04 14:42:12,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-04 14:42:12,616 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 204 transitions, 1996 flow [2024-06-04 14:42:12,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:12,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:12,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:42:12,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:42:12,616 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:12,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:12,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1199765413, now seen corresponding path program 3 times [2024-06-04 14:42:12,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:12,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459446205] [2024-06-04 14:42:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:12,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:13,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:13,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459446205] [2024-06-04 14:42:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459446205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:13,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:13,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647208948] [2024-06-04 14:42:13,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:13,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:13,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:13,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 204 transitions, 1996 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:13,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:13,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:13,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:14,828 INFO L124 PetriNetUnfolderBase]: 2791/4262 cut-off events. [2024-06-04 14:42:14,828 INFO L125 PetriNetUnfolderBase]: For 359319/359326 co-relation queries the response was YES. [2024-06-04 14:42:14,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34219 conditions, 4262 events. 2791/4262 cut-off events. For 359319/359326 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21617 event pairs, 737 based on Foata normal form. 8/4259 useless extension candidates. Maximal degree in co-relation 34140. Up to 3721 conditions per place. [2024-06-04 14:42:14,861 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 162 selfloop transitions, 72 changer transitions 0/247 dead transitions. [2024-06-04 14:42:14,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 247 transitions, 2624 flow [2024-06-04 14:42:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:42:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:42:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-04 14:42:14,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-04 14:42:14,863 INFO L175 Difference]: Start difference. First operand has 171 places, 204 transitions, 1996 flow. Second operand 11 states and 215 transitions. [2024-06-04 14:42:14,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 247 transitions, 2624 flow [2024-06-04 14:42:15,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 247 transitions, 2459 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-04 14:42:15,141 INFO L231 Difference]: Finished difference. Result has 174 places, 206 transitions, 2021 flow [2024-06-04 14:42:15,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1831, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2021, PETRI_PLACES=174, PETRI_TRANSITIONS=206} [2024-06-04 14:42:15,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-04 14:42:15,142 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 206 transitions, 2021 flow [2024-06-04 14:42:15,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:15,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:15,142 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 14:42:15,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:42:15,142 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:15,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1475858263, now seen corresponding path program 4 times [2024-06-04 14:42:15,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:15,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035052933] [2024-06-04 14:42:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:15,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:16,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035052933] [2024-06-04 14:42:16,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035052933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:16,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:16,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:16,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343671083] [2024-06-04 14:42:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:16,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:16,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:16,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:16,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 206 transitions, 2021 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:16,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:16,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:16,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:17,093 INFO L124 PetriNetUnfolderBase]: 2833/4328 cut-off events. [2024-06-04 14:42:17,094 INFO L125 PetriNetUnfolderBase]: For 374961/374968 co-relation queries the response was YES. [2024-06-04 14:42:17,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35169 conditions, 4328 events. 2833/4328 cut-off events. For 374961/374968 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21997 event pairs, 593 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 35088. Up to 3754 conditions per place. [2024-06-04 14:42:17,130 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 66 changer transitions 0/248 dead transitions. [2024-06-04 14:42:17,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 248 transitions, 2853 flow [2024-06-04 14:42:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-04 14:42:17,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-04 14:42:17,131 INFO L175 Difference]: Start difference. First operand has 174 places, 206 transitions, 2021 flow. Second operand 9 states and 188 transitions. [2024-06-04 14:42:17,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 248 transitions, 2853 flow [2024-06-04 14:42:17,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 248 transitions, 2693 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 14:42:17,419 INFO L231 Difference]: Finished difference. Result has 174 places, 210 transitions, 2076 flow [2024-06-04 14:42:17,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2076, PETRI_PLACES=174, PETRI_TRANSITIONS=210} [2024-06-04 14:42:17,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-04 14:42:17,420 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 210 transitions, 2076 flow [2024-06-04 14:42:17,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:17,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:17,421 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 14:42:17,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:42:17,421 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:17,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1834014629, now seen corresponding path program 5 times [2024-06-04 14:42:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:17,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535092215] [2024-06-04 14:42:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:17,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:18,524 INFO 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 14:42:18,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:18,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535092215] [2024-06-04 14:42:18,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535092215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:18,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:18,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002803072] [2024-06-04 14:42:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:18,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:18,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:18,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 210 transitions, 2076 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:18,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:18,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:18,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:19,519 INFO L124 PetriNetUnfolderBase]: 2850/4355 cut-off events. [2024-06-04 14:42:19,520 INFO L125 PetriNetUnfolderBase]: For 391015/391022 co-relation queries the response was YES. [2024-06-04 14:42:19,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35649 conditions, 4355 events. 2850/4355 cut-off events. For 391015/391022 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22213 event pairs, 744 based on Foata normal form. 4/4353 useless extension candidates. Maximal degree in co-relation 35567. Up to 3868 conditions per place. [2024-06-04 14:42:19,559 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 63 changer transitions 0/251 dead transitions. [2024-06-04 14:42:19,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 2714 flow [2024-06-04 14:42:19,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:42:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:42:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-04 14:42:19,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-04 14:42:19,561 INFO L175 Difference]: Start difference. First operand has 174 places, 210 transitions, 2076 flow. Second operand 10 states and 201 transitions. [2024-06-04 14:42:19,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 2714 flow [2024-06-04 14:42:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 251 transitions, 2600 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:19,965 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2140 flow [2024-06-04 14:42:19,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2140, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-04 14:42:19,966 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-04 14:42:19,966 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2140 flow [2024-06-04 14:42:19,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:19,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:19,966 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 14:42:19,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:42:19,967 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 14:42:19,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1834014474, now seen corresponding path program 2 times [2024-06-04 14:42:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:19,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690441071] [2024-06-04 14:42:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:19,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:20,931 INFO 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 14:42:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690441071] [2024-06-04 14:42:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690441071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:20,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520861947] [2024-06-04 14:42:20,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:21,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:21,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2140 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:21,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:21,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:21,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:21,908 INFO L124 PetriNetUnfolderBase]: 2869/4393 cut-off events. [2024-06-04 14:42:21,908 INFO L125 PetriNetUnfolderBase]: For 406969/406972 co-relation queries the response was YES. [2024-06-04 14:42:21,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36274 conditions, 4393 events. 2869/4393 cut-off events. For 406969/406972 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 22595 event pairs, 690 based on Foata normal form. 4/4393 useless extension candidates. Maximal degree in co-relation 36190. Up to 3525 conditions per place. [2024-06-04 14:42:21,950 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 103 changer transitions 0/268 dead transitions. [2024-06-04 14:42:21,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 268 transitions, 3528 flow [2024-06-04 14:42:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 14:42:21,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025252525252525 [2024-06-04 14:42:21,952 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2140 flow. Second operand 9 states and 199 transitions. [2024-06-04 14:42:21,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 268 transitions, 3528 flow [2024-06-04 14:42:22,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 268 transitions, 3382 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 14:42:22,418 INFO L231 Difference]: Finished difference. Result has 183 places, 224 transitions, 2528 flow [2024-06-04 14:42:22,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2528, PETRI_PLACES=183, PETRI_TRANSITIONS=224} [2024-06-04 14:42:22,418 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-04 14:42:22,419 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 224 transitions, 2528 flow [2024-06-04 14:42:22,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:22,419 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 14:42:22,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:42:22,419 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:22,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1944630437, now seen corresponding path program 6 times [2024-06-04 14:42:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:22,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216516956] [2024-06-04 14:42:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:22,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:23,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:23,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216516956] [2024-06-04 14:42:23,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216516956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:23,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:23,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:23,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068210885] [2024-06-04 14:42:23,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:23,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:23,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:23,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:23,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:23,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 224 transitions, 2528 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:24,482 INFO L124 PetriNetUnfolderBase]: 2861/4381 cut-off events. [2024-06-04 14:42:24,482 INFO L125 PetriNetUnfolderBase]: For 422332/422335 co-relation queries the response was YES. [2024-06-04 14:42:24,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37616 conditions, 4381 events. 2861/4381 cut-off events. For 422332/422335 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 22486 event pairs, 726 based on Foata normal form. 4/4376 useless extension candidates. Maximal degree in co-relation 37528. Up to 3886 conditions per place. [2024-06-04 14:42:24,530 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 191 selfloop transitions, 51 changer transitions 0/255 dead transitions. [2024-06-04 14:42:24,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3106 flow [2024-06-04 14:42:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-04 14:42:24,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-04 14:42:24,536 INFO L175 Difference]: Start difference. First operand has 183 places, 224 transitions, 2528 flow. Second operand 9 states and 178 transitions. [2024-06-04 14:42:24,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3106 flow [2024-06-04 14:42:25,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 255 transitions, 3045 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:25,044 INFO L231 Difference]: Finished difference. Result has 189 places, 224 transitions, 2576 flow [2024-06-04 14:42:25,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2576, PETRI_PLACES=189, PETRI_TRANSITIONS=224} [2024-06-04 14:42:25,045 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-04 14:42:25,045 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 224 transitions, 2576 flow [2024-06-04 14:42:25,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:25,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:25,046 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 14:42:25,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:42:25,046 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 14:42:25,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:25,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1833870324, now seen corresponding path program 3 times [2024-06-04 14:42:25,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:25,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446977646] [2024-06-04 14:42:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:25,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:26,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446977646] [2024-06-04 14:42:26,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446977646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:26,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:26,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:26,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302586863] [2024-06-04 14:42:26,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:26,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:26,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:26,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:26,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 224 transitions, 2576 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:26,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:26,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:26,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:27,106 INFO L124 PetriNetUnfolderBase]: 2915/4459 cut-off events. [2024-06-04 14:42:27,106 INFO L125 PetriNetUnfolderBase]: For 442456/442459 co-relation queries the response was YES. [2024-06-04 14:42:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38624 conditions, 4459 events. 2915/4459 cut-off events. For 442456/442459 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23032 event pairs, 686 based on Foata normal form. 4/4459 useless extension candidates. Maximal degree in co-relation 38534. Up to 3720 conditions per place. [2024-06-04 14:42:27,148 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 168 selfloop transitions, 91 changer transitions 0/272 dead transitions. [2024-06-04 14:42:27,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 272 transitions, 3894 flow [2024-06-04 14:42:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-04 14:42:27,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-04 14:42:27,151 INFO L175 Difference]: Start difference. First operand has 189 places, 224 transitions, 2576 flow. Second operand 9 states and 196 transitions. [2024-06-04 14:42:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 272 transitions, 3894 flow [2024-06-04 14:42:27,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 272 transitions, 3626 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-04 14:42:27,671 INFO L231 Difference]: Finished difference. Result has 189 places, 230 transitions, 2606 flow [2024-06-04 14:42:27,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=189, PETRI_TRANSITIONS=230} [2024-06-04 14:42:27,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-04 14:42:27,680 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 230 transitions, 2606 flow [2024-06-04 14:42:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:27,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:27,680 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 14:42:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:42:27,681 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 14:42:27,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1833864744, now seen corresponding path program 4 times [2024-06-04 14:42:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:27,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508882160] [2024-06-04 14:42:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:28,807 INFO 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 14:42:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508882160] [2024-06-04 14:42:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508882160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:28,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:28,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97480323] [2024-06-04 14:42:28,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:28,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:28,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:28,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 230 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:28,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:28,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:28,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:29,837 INFO L124 PetriNetUnfolderBase]: 2905/4445 cut-off events. [2024-06-04 14:42:29,838 INFO L125 PetriNetUnfolderBase]: For 454477/454480 co-relation queries the response was YES. [2024-06-04 14:42:29,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38402 conditions, 4445 events. 2905/4445 cut-off events. For 454477/454480 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22942 event pairs, 686 based on Foata normal form. 4/4445 useless extension candidates. Maximal degree in co-relation 38313. Up to 3772 conditions per place. [2024-06-04 14:42:29,877 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 174 selfloop transitions, 78 changer transitions 0/265 dead transitions. [2024-06-04 14:42:29,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 265 transitions, 3222 flow [2024-06-04 14:42:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-04 14:42:29,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-04 14:42:29,879 INFO L175 Difference]: Start difference. First operand has 189 places, 230 transitions, 2606 flow. Second operand 9 states and 186 transitions. [2024-06-04 14:42:29,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 265 transitions, 3222 flow [2024-06-04 14:42:30,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 265 transitions, 3058 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:30,318 INFO L231 Difference]: Finished difference. Result has 193 places, 230 transitions, 2606 flow [2024-06-04 14:42:30,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=193, PETRI_TRANSITIONS=230} [2024-06-04 14:42:30,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-04 14:42:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 230 transitions, 2606 flow [2024-06-04 14:42:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:30,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:30,319 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 14:42:30,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:42:30,319 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:30,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:30,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1828300554, now seen corresponding path program 5 times [2024-06-04 14:42:30,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:30,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948934578] [2024-06-04 14:42:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:30,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:31,439 INFO 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 14:42:31,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:31,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948934578] [2024-06-04 14:42:31,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948934578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:31,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:31,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:31,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706207982] [2024-06-04 14:42:31,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:31,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:31,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:31,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:31,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:31,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:31,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 230 transitions, 2606 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:31,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:31,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:31,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:32,622 INFO L124 PetriNetUnfolderBase]: 2927/4482 cut-off events. [2024-06-04 14:42:32,623 INFO L125 PetriNetUnfolderBase]: For 471144/471147 co-relation queries the response was YES. [2024-06-04 14:42:32,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39111 conditions, 4482 events. 2927/4482 cut-off events. For 471144/471147 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 23210 event pairs, 700 based on Foata normal form. 4/4482 useless extension candidates. Maximal degree in co-relation 39020. Up to 3771 conditions per place. [2024-06-04 14:42:32,676 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 177 selfloop transitions, 78 changer transitions 0/268 dead transitions. [2024-06-04 14:42:32,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 268 transitions, 3481 flow [2024-06-04 14:42:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-04 14:42:32,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-04 14:42:32,680 INFO L175 Difference]: Start difference. First operand has 193 places, 230 transitions, 2606 flow. Second operand 9 states and 185 transitions. [2024-06-04 14:42:32,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 268 transitions, 3481 flow [2024-06-04 14:42:33,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 268 transitions, 3315 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 14:42:33,146 INFO L231 Difference]: Finished difference. Result has 194 places, 233 transitions, 2667 flow [2024-06-04 14:42:33,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2667, PETRI_PLACES=194, PETRI_TRANSITIONS=233} [2024-06-04 14:42:33,146 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-04 14:42:33,146 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 233 transitions, 2667 flow [2024-06-04 14:42:33,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:33,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:33,147 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 14:42:33,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:42:33,147 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 14:42:33,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1828508099, now seen corresponding path program 7 times [2024-06-04 14:42:33,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:33,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650540459] [2024-06-04 14:42:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:33,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:34,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:34,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650540459] [2024-06-04 14:42:34,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650540459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:34,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:34,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:34,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434634883] [2024-06-04 14:42:34,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:34,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:34,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:34,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:34,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:34,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 233 transitions, 2667 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:34,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:34,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:34,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:35,249 INFO L124 PetriNetUnfolderBase]: 2944/4509 cut-off events. [2024-06-04 14:42:35,249 INFO L125 PetriNetUnfolderBase]: For 489028/489031 co-relation queries the response was YES. [2024-06-04 14:42:35,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39609 conditions, 4509 events. 2944/4509 cut-off events. For 489028/489031 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23390 event pairs, 741 based on Foata normal form. 4/4504 useless extension candidates. Maximal degree in co-relation 39517. Up to 4064 conditions per place. [2024-06-04 14:42:35,292 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 208 selfloop transitions, 44 changer transitions 0/265 dead transitions. [2024-06-04 14:42:35,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 265 transitions, 3299 flow [2024-06-04 14:42:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:42:35,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-04 14:42:35,316 INFO L175 Difference]: Start difference. First operand has 194 places, 233 transitions, 2667 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:42:35,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 265 transitions, 3299 flow [2024-06-04 14:42:35,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 265 transitions, 3150 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:42:35,829 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2653 flow [2024-06-04 14:42:35,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2653, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2024-06-04 14:42:35,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-04 14:42:35,830 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2653 flow [2024-06-04 14:42:35,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:35,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:35,830 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 14:42:35,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:42:35,831 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 14:42:35,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1828507944, now seen corresponding path program 6 times [2024-06-04 14:42:35,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531870087] [2024-06-04 14:42:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:35,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:36,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:36,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531870087] [2024-06-04 14:42:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531870087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:36,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:36,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721070813] [2024-06-04 14:42:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:36,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:37,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:37,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 2653 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:37,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:37,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:37,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:37,895 INFO L124 PetriNetUnfolderBase]: 2998/4587 cut-off events. [2024-06-04 14:42:37,895 INFO L125 PetriNetUnfolderBase]: For 512347/512350 co-relation queries the response was YES. [2024-06-04 14:42:37,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40513 conditions, 4587 events. 2998/4587 cut-off events. For 512347/512350 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23879 event pairs, 698 based on Foata normal form. 4/4587 useless extension candidates. Maximal degree in co-relation 40420. Up to 3820 conditions per place. [2024-06-04 14:42:37,936 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 181 selfloop transitions, 85 changer transitions 0/279 dead transitions. [2024-06-04 14:42:37,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 279 transitions, 3841 flow [2024-06-04 14:42:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 14:42:37,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-04 14:42:37,938 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2653 flow. Second operand 9 states and 190 transitions. [2024-06-04 14:42:37,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 279 transitions, 3841 flow [2024-06-04 14:42:38,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 279 transitions, 3728 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 14:42:38,397 INFO L231 Difference]: Finished difference. Result has 199 places, 241 transitions, 2850 flow [2024-06-04 14:42:38,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2850, PETRI_PLACES=199, PETRI_TRANSITIONS=241} [2024-06-04 14:42:38,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-04 14:42:38,398 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 241 transitions, 2850 flow [2024-06-04 14:42:38,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:38,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:38,398 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 14:42:38,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:42:38,398 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:38,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:38,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1828502364, now seen corresponding path program 7 times [2024-06-04 14:42:38,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:38,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669721885] [2024-06-04 14:42:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:38,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:39,644 INFO 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 14:42:39,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:39,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669721885] [2024-06-04 14:42:39,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669721885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:39,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:39,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027030869] [2024-06-04 14:42:39,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:39,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:39,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:39,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:39,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:39,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 241 transitions, 2850 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:39,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:39,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:39,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:40,715 INFO L124 PetriNetUnfolderBase]: 2988/4573 cut-off events. [2024-06-04 14:42:40,715 INFO L125 PetriNetUnfolderBase]: For 525254/525257 co-relation queries the response was YES. [2024-06-04 14:42:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40748 conditions, 4573 events. 2988/4573 cut-off events. For 525254/525257 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23749 event pairs, 696 based on Foata normal form. 4/4573 useless extension candidates. Maximal degree in co-relation 40654. Up to 3895 conditions per place. [2024-06-04 14:42:40,758 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 192 selfloop transitions, 70 changer transitions 0/275 dead transitions. [2024-06-04 14:42:40,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 275 transitions, 3484 flow [2024-06-04 14:42:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:40,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 14:42:40,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-04 14:42:40,760 INFO L175 Difference]: Start difference. First operand has 199 places, 241 transitions, 2850 flow. Second operand 9 states and 184 transitions. [2024-06-04 14:42:40,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 275 transitions, 3484 flow [2024-06-04 14:42:41,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 275 transitions, 3324 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 14:42:41,262 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2838 flow [2024-06-04 14:42:41,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2838, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-04 14:42:41,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-04 14:42:41,262 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2838 flow [2024-06-04 14:42:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:41,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:41,263 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 14:42:41,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:42:41,263 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 14:42:41,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1039443248, now seen corresponding path program 1 times [2024-06-04 14:42:41,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:41,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024392681] [2024-06-04 14:42:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:41,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:42,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:42,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024392681] [2024-06-04 14:42:42,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024392681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:42,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:42:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426560128] [2024-06-04 14:42:42,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:42,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:42:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:42:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:42:42,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:42,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2838 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:42,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:42,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:42,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:43,096 INFO L124 PetriNetUnfolderBase]: 3332/5000 cut-off events. [2024-06-04 14:42:43,096 INFO L125 PetriNetUnfolderBase]: For 556862/556865 co-relation queries the response was YES. [2024-06-04 14:42:43,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44320 conditions, 5000 events. 3332/5000 cut-off events. For 556862/556865 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 25068 event pairs, 896 based on Foata normal form. 4/5000 useless extension candidates. Maximal degree in co-relation 44224. Up to 4661 conditions per place. [2024-06-04 14:42:43,141 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-04 14:42:43,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 280 transitions, 3911 flow [2024-06-04 14:42:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:42:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:42:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:42:43,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:42:43,142 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2838 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:42:43,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 280 transitions, 3911 flow [2024-06-04 14:42:43,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 280 transitions, 3739 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:42:43,671 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 3089 flow [2024-06-04 14:42:43,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3089, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2024-06-04 14:42:43,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-04 14:42:43,672 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 3089 flow [2024-06-04 14:42:43,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:43,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:43,672 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 14:42:43,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:42:43,672 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 14:42:43,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1664935472, now seen corresponding path program 2 times [2024-06-04 14:42:43,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:43,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773858472] [2024-06-04 14:42:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:43,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:44,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773858472] [2024-06-04 14:42:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773858472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:44,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803550774] [2024-06-04 14:42:44,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 3089 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:44,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:45,374 INFO L124 PetriNetUnfolderBase]: 3372/5055 cut-off events. [2024-06-04 14:42:45,374 INFO L125 PetriNetUnfolderBase]: For 583664/583667 co-relation queries the response was YES. [2024-06-04 14:42:45,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45622 conditions, 5055 events. 3372/5055 cut-off events. For 583664/583667 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25371 event pairs, 893 based on Foata normal form. 6/5057 useless extension candidates. Maximal degree in co-relation 45523. Up to 4624 conditions per place. [2024-06-04 14:42:45,428 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 206 selfloop transitions, 62 changer transitions 0/294 dead transitions. [2024-06-04 14:42:45,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 294 transitions, 4179 flow [2024-06-04 14:42:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 14:42:45,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:42:45,429 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 3089 flow. Second operand 7 states and 132 transitions. [2024-06-04 14:42:45,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 294 transitions, 4179 flow [2024-06-04 14:42:46,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 294 transitions, 4088 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-04 14:42:46,117 INFO L231 Difference]: Finished difference. Result has 210 places, 276 transitions, 3427 flow [2024-06-04 14:42:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3427, PETRI_PLACES=210, PETRI_TRANSITIONS=276} [2024-06-04 14:42:46,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-04 14:42:46,117 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 276 transitions, 3427 flow [2024-06-04 14:42:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:46,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:46,118 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 14:42:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:42:46,118 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 14:42:46,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash 828438112, now seen corresponding path program 1 times [2024-06-04 14:42:46,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:46,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213382895] [2024-06-04 14:42:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:46,993 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 14:42:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:46,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213382895] [2024-06-04 14:42:46,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213382895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:46,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:46,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:42:46,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126810395] [2024-06-04 14:42:46,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:46,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:42:46,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:46,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:42:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:42:47,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:47,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 276 transitions, 3427 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:47,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:47,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:47,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:47,974 INFO L124 PetriNetUnfolderBase]: 3403/5096 cut-off events. [2024-06-04 14:42:47,975 INFO L125 PetriNetUnfolderBase]: For 609646/609646 co-relation queries the response was YES. [2024-06-04 14:42:48,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47233 conditions, 5096 events. 3403/5096 cut-off events. For 609646/609646 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 25519 event pairs, 886 based on Foata normal form. 3/5096 useless extension candidates. Maximal degree in co-relation 47131. Up to 4833 conditions per place. [2024-06-04 14:42:48,031 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 241 selfloop transitions, 37 changer transitions 0/304 dead transitions. [2024-06-04 14:42:48,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 304 transitions, 4257 flow [2024-06-04 14:42:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:42:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:42:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 14:42:48,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-04 14:42:48,033 INFO L175 Difference]: Start difference. First operand has 210 places, 276 transitions, 3427 flow. Second operand 7 states and 131 transitions. [2024-06-04 14:42:48,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 304 transitions, 4257 flow [2024-06-04 14:42:48,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 304 transitions, 4124 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-04 14:42:48,745 INFO L231 Difference]: Finished difference. Result has 216 places, 285 transitions, 3503 flow [2024-06-04 14:42:48,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3503, PETRI_PLACES=216, PETRI_TRANSITIONS=285} [2024-06-04 14:42:48,746 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-04 14:42:48,746 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 285 transitions, 3503 flow [2024-06-04 14:42:48,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:48,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:48,746 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 14:42:48,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:42:48,747 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:48,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash -640876824, now seen corresponding path program 8 times [2024-06-04 14:42:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:48,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412903928] [2024-06-04 14:42:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:49,751 INFO 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 14:42:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412903928] [2024-06-04 14:42:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412903928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:49,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:49,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279782165] [2024-06-04 14:42:49,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:49,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:49,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:49,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 285 transitions, 3503 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:49,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:49,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:49,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:50,925 INFO L124 PetriNetUnfolderBase]: 3176/4840 cut-off events. [2024-06-04 14:42:50,925 INFO L125 PetriNetUnfolderBase]: For 622648/622651 co-relation queries the response was YES. [2024-06-04 14:42:50,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46286 conditions, 4840 events. 3176/4840 cut-off events. For 622648/622651 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 25268 event pairs, 762 based on Foata normal form. 8/4839 useless extension candidates. Maximal degree in co-relation 46181. Up to 4430 conditions per place. [2024-06-04 14:42:50,978 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 265 selfloop transitions, 36 changer transitions 0/321 dead transitions. [2024-06-04 14:42:50,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 321 transitions, 4712 flow [2024-06-04 14:42:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:42:50,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-04 14:42:50,979 INFO L175 Difference]: Start difference. First operand has 216 places, 285 transitions, 3503 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:42:50,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 321 transitions, 4712 flow [2024-06-04 14:42:51,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 321 transitions, 4652 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 14:42:51,720 INFO L231 Difference]: Finished difference. Result has 223 places, 288 transitions, 3602 flow [2024-06-04 14:42:51,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3602, PETRI_PLACES=223, PETRI_TRANSITIONS=288} [2024-06-04 14:42:51,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-04 14:42:51,720 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 288 transitions, 3602 flow [2024-06-04 14:42:51,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:51,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:51,721 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 14:42:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:42:51,721 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:51,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 921301336, now seen corresponding path program 1 times [2024-06-04 14:42:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:51,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148665346] [2024-06-04 14:42:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:51,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:42:52,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:52,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148665346] [2024-06-04 14:42:52,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148665346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:52,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:52,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:42:52,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226098012] [2024-06-04 14:42:52,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:52,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:42:52,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:42:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:42:52,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:42:52,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 288 transitions, 3602 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:52,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:52,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:42:52,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:53,961 INFO L124 PetriNetUnfolderBase]: 3446/5163 cut-off events. [2024-06-04 14:42:53,962 INFO L125 PetriNetUnfolderBase]: For 644898/644898 co-relation queries the response was YES. [2024-06-04 14:42:53,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48914 conditions, 5163 events. 3446/5163 cut-off events. For 644898/644898 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25942 event pairs, 840 based on Foata normal form. 2/5162 useless extension candidates. Maximal degree in co-relation 48806. Up to 4895 conditions per place. [2024-06-04 14:42:54,018 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 274 selfloop transitions, 26 changer transitions 0/318 dead transitions. [2024-06-04 14:42:54,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 318 transitions, 4327 flow [2024-06-04 14:42:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:42:54,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40404040404040403 [2024-06-04 14:42:54,020 INFO L175 Difference]: Start difference. First operand has 223 places, 288 transitions, 3602 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:42:54,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 318 transitions, 4327 flow [2024-06-04 14:42:54,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 318 transitions, 3983 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-04 14:42:54,820 INFO L231 Difference]: Finished difference. Result has 223 places, 291 transitions, 3371 flow [2024-06-04 14:42:54,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3371, PETRI_PLACES=223, PETRI_TRANSITIONS=291} [2024-06-04 14:42:54,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-04 14:42:54,820 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 291 transitions, 3371 flow [2024-06-04 14:42:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:54,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:54,821 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 14:42:54,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:42:54,821 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash -648026664, now seen corresponding path program 9 times [2024-06-04 14:42:54,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:54,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984732837] [2024-06-04 14:42:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:55,845 INFO 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 14:42:55,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:55,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984732837] [2024-06-04 14:42:55,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984732837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:55,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:55,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:55,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619945340] [2024-06-04 14:42:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:55,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:55,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 291 transitions, 3371 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:55,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:55,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:55,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:42:57,061 INFO L124 PetriNetUnfolderBase]: 3225/4913 cut-off events. [2024-06-04 14:42:57,061 INFO L125 PetriNetUnfolderBase]: For 655144/655151 co-relation queries the response was YES. [2024-06-04 14:42:57,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 4913 events. 3225/4913 cut-off events. For 655144/655151 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25751 event pairs, 709 based on Foata normal form. 6/4913 useless extension candidates. Maximal degree in co-relation 46835. Up to 4409 conditions per place. [2024-06-04 14:42:57,118 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 260 selfloop transitions, 46 changer transitions 0/326 dead transitions. [2024-06-04 14:42:57,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 326 transitions, 4384 flow [2024-06-04 14:42:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:42:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:42:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-04 14:42:57,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-04 14:42:57,120 INFO L175 Difference]: Start difference. First operand has 223 places, 291 transitions, 3371 flow. Second operand 9 states and 178 transitions. [2024-06-04 14:42:57,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 326 transitions, 4384 flow [2024-06-04 14:42:57,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 326 transitions, 4328 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:42:57,784 INFO L231 Difference]: Finished difference. Result has 224 places, 294 transitions, 3496 flow [2024-06-04 14:42:57,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3496, PETRI_PLACES=224, PETRI_TRANSITIONS=294} [2024-06-04 14:42:57,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 179 predicate places. [2024-06-04 14:42:57,785 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 294 transitions, 3496 flow [2024-06-04 14:42:57,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:57,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:42:57,785 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 14:42:57,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:42:57,786 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:42:57,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:42:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash 655067880, now seen corresponding path program 10 times [2024-06-04 14:42:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:42:57,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909368567] [2024-06-04 14:42:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:42:57,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:42:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:42:58,910 INFO 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 14:42:58,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:42:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909368567] [2024-06-04 14:42:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909368567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:42:58,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:42:58,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:42:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022364126] [2024-06-04 14:42:58,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:42:58,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:42:58,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:42:58,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:42:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:42:59,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:42:59,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 294 transitions, 3496 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:42:59,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:42:59,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:42:59,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:00,050 INFO L124 PetriNetUnfolderBase]: 3247/4950 cut-off events. [2024-06-04 14:43:00,050 INFO L125 PetriNetUnfolderBase]: For 677216/677223 co-relation queries the response was YES. [2024-06-04 14:43:00,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47746 conditions, 4950 events. 3247/4950 cut-off events. For 677216/677223 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 26029 event pairs, 704 based on Foata normal form. 6/4950 useless extension candidates. Maximal degree in co-relation 47637. Up to 4470 conditions per place. [2024-06-04 14:43:00,105 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 266 selfloop transitions, 41 changer transitions 0/327 dead transitions. [2024-06-04 14:43:00,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 4285 flow [2024-06-04 14:43:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 14:43:00,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-04 14:43:00,107 INFO L175 Difference]: Start difference. First operand has 224 places, 294 transitions, 3496 flow. Second operand 9 states and 174 transitions. [2024-06-04 14:43:00,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 4285 flow [2024-06-04 14:43:00,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 327 transitions, 4143 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:00,837 INFO L231 Difference]: Finished difference. Result has 226 places, 297 transitions, 3531 flow [2024-06-04 14:43:00,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3531, PETRI_PLACES=226, PETRI_TRANSITIONS=297} [2024-06-04 14:43:00,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-04 14:43:00,838 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 297 transitions, 3531 flow [2024-06-04 14:43:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:00,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:00,838 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 14:43:00,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:43:00,838 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:00,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash 655062145, now seen corresponding path program 8 times [2024-06-04 14:43:00,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:00,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65872035] [2024-06-04 14:43:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:00,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:01,803 INFO 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 14:43:01,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65872035] [2024-06-04 14:43:01,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65872035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:01,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610949352] [2024-06-04 14:43:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:01,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:01,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:01,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 297 transitions, 3531 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:01,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:01,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:01,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:03,068 INFO L124 PetriNetUnfolderBase]: 3239/4938 cut-off events. [2024-06-04 14:43:03,068 INFO L125 PetriNetUnfolderBase]: For 690171/690178 co-relation queries the response was YES. [2024-06-04 14:43:03,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47659 conditions, 4938 events. 3239/4938 cut-off events. For 690171/690178 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25975 event pairs, 727 based on Foata normal form. 6/4938 useless extension candidates. Maximal degree in co-relation 47549. Up to 4600 conditions per place. [2024-06-04 14:43:03,117 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 22 changer transitions 0/324 dead transitions. [2024-06-04 14:43:03,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 324 transitions, 4219 flow [2024-06-04 14:43:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:03,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:43:03,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:43:03,118 INFO L175 Difference]: Start difference. First operand has 226 places, 297 transitions, 3531 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:43:03,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 324 transitions, 4219 flow [2024-06-04 14:43:03,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 324 transitions, 4061 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:03,806 INFO L231 Difference]: Finished difference. Result has 228 places, 297 transitions, 3424 flow [2024-06-04 14:43:03,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3424, PETRI_PLACES=228, PETRI_TRANSITIONS=297} [2024-06-04 14:43:03,807 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-04 14:43:03,807 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 297 transitions, 3424 flow [2024-06-04 14:43:03,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:03,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:03,807 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 14:43:03,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:43:03,808 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:03,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:03,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1599224210, now seen corresponding path program 11 times [2024-06-04 14:43:03,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:03,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377700502] [2024-06-04 14:43:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:03,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:04,821 INFO 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 14:43:04,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:04,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377700502] [2024-06-04 14:43:04,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377700502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:04,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:04,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:43:04,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079404956] [2024-06-04 14:43:04,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:04,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:43:04,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:04,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:43:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:43:04,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:04,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 297 transitions, 3424 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:04,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:04,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:04,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:06,019 INFO L124 PetriNetUnfolderBase]: 3229/4924 cut-off events. [2024-06-04 14:43:06,020 INFO L125 PetriNetUnfolderBase]: For 702458/702465 co-relation queries the response was YES. [2024-06-04 14:43:06,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47281 conditions, 4924 events. 3229/4924 cut-off events. For 702458/702465 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25892 event pairs, 700 based on Foata normal form. 6/4924 useless extension candidates. Maximal degree in co-relation 47170. Up to 4317 conditions per place. [2024-06-04 14:43:06,076 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 246 selfloop transitions, 63 changer transitions 0/329 dead transitions. [2024-06-04 14:43:06,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4380 flow [2024-06-04 14:43:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:43:06,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:43:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-04 14:43:06,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-04 14:43:06,078 INFO L175 Difference]: Start difference. First operand has 228 places, 297 transitions, 3424 flow. Second operand 9 states and 178 transitions. [2024-06-04 14:43:06,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4380 flow [2024-06-04 14:43:06,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4295 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 14:43:06,760 INFO L231 Difference]: Finished difference. Result has 229 places, 297 transitions, 3473 flow [2024-06-04 14:43:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3473, PETRI_PLACES=229, PETRI_TRANSITIONS=297} [2024-06-04 14:43:06,761 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-04 14:43:06,761 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 297 transitions, 3473 flow [2024-06-04 14:43:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:06,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:06,761 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 14:43:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:43:06,762 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 14:43:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1242220222, now seen corresponding path program 2 times [2024-06-04 14:43:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370513727] [2024-06-04 14:43:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:06,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:07,594 INFO 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 14:43:07,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:07,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370513727] [2024-06-04 14:43:07,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370513727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:07,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:07,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:07,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926052799] [2024-06-04 14:43:07,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:07,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:07,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:07,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:07,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 297 transitions, 3473 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:07,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:07,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:07,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:08,678 INFO L124 PetriNetUnfolderBase]: 3505/5248 cut-off events. [2024-06-04 14:43:08,678 INFO L125 PetriNetUnfolderBase]: For 729142/729142 co-relation queries the response was YES. [2024-06-04 14:43:08,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49829 conditions, 5248 events. 3505/5248 cut-off events. For 729142/729142 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26410 event pairs, 907 based on Foata normal form. 3/5248 useless extension candidates. Maximal degree in co-relation 49717. Up to 5042 conditions per place. [2024-06-04 14:43:08,739 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 269 selfloop transitions, 16 changer transitions 0/311 dead transitions. [2024-06-04 14:43:08,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 311 transitions, 4123 flow [2024-06-04 14:43:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:08,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:43:08,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-04 14:43:08,741 INFO L175 Difference]: Start difference. First operand has 229 places, 297 transitions, 3473 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:43:08,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 311 transitions, 4123 flow [2024-06-04 14:43:09,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 311 transitions, 3761 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-04 14:43:09,592 INFO L231 Difference]: Finished difference. Result has 227 places, 300 transitions, 3205 flow [2024-06-04 14:43:09,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3205, PETRI_PLACES=227, PETRI_TRANSITIONS=300} [2024-06-04 14:43:09,593 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-04 14:43:09,593 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 300 transitions, 3205 flow [2024-06-04 14:43:09,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:09,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:09,593 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 14:43:09,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:43:09,593 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 14:43:09,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:09,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1027063088, now seen corresponding path program 3 times [2024-06-04 14:43:09,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:09,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222594878] [2024-06-04 14:43:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:09,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:10,370 INFO 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 14:43:10,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:10,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222594878] [2024-06-04 14:43:10,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222594878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:10,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:10,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:10,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640075364] [2024-06-04 14:43:10,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:10,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:10,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:10,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:10,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:10,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 300 transitions, 3205 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:10,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:10,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:10,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:11,448 INFO L124 PetriNetUnfolderBase]: 3501/5244 cut-off events. [2024-06-04 14:43:11,449 INFO L125 PetriNetUnfolderBase]: For 740906/740909 co-relation queries the response was YES. [2024-06-04 14:43:11,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48500 conditions, 5244 events. 3501/5244 cut-off events. For 740906/740909 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26372 event pairs, 909 based on Foata normal form. 4/5244 useless extension candidates. Maximal degree in co-relation 48389. Up to 5012 conditions per place. [2024-06-04 14:43:11,509 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 258 selfloop transitions, 26 changer transitions 0/310 dead transitions. [2024-06-04 14:43:11,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 3933 flow [2024-06-04 14:43:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:11,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-04 14:43:11,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-04 14:43:11,510 INFO L175 Difference]: Start difference. First operand has 227 places, 300 transitions, 3205 flow. Second operand 7 states and 122 transitions. [2024-06-04 14:43:11,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 3933 flow [2024-06-04 14:43:12,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 310 transitions, 3838 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:12,670 INFO L231 Difference]: Finished difference. Result has 228 places, 300 transitions, 3170 flow [2024-06-04 14:43:12,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3170, PETRI_PLACES=228, PETRI_TRANSITIONS=300} [2024-06-04 14:43:12,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-04 14:43:12,670 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 300 transitions, 3170 flow [2024-06-04 14:43:12,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:12,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:12,671 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 14:43:12,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:43:12,671 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 14:43:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 840460222, now seen corresponding path program 3 times [2024-06-04 14:43:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:12,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267793413] [2024-06-04 14:43:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267793413] [2024-06-04 14:43:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267793413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:13,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:13,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399708607] [2024-06-04 14:43:13,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:13,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:13,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:13,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 300 transitions, 3170 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:13,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:13,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:13,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:14,531 INFO L124 PetriNetUnfolderBase]: 3492/5231 cut-off events. [2024-06-04 14:43:14,531 INFO L125 PetriNetUnfolderBase]: For 756586/756586 co-relation queries the response was YES. [2024-06-04 14:43:14,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48415 conditions, 5231 events. 3492/5231 cut-off events. For 756586/756586 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 26330 event pairs, 903 based on Foata normal form. 3/5231 useless extension candidates. Maximal degree in co-relation 48304. Up to 5013 conditions per place. [2024-06-04 14:43:14,588 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 266 selfloop transitions, 21 changer transitions 0/313 dead transitions. [2024-06-04 14:43:14,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 313 transitions, 3780 flow [2024-06-04 14:43:14,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:43:14,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:43:14,590 INFO L175 Difference]: Start difference. First operand has 228 places, 300 transitions, 3170 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:43:14,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 313 transitions, 3780 flow [2024-06-04 14:43:15,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 313 transitions, 3659 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:15,249 INFO L231 Difference]: Finished difference. Result has 231 places, 300 transitions, 3097 flow [2024-06-04 14:43:15,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3097, PETRI_PLACES=231, PETRI_TRANSITIONS=300} [2024-06-04 14:43:15,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-04 14:43:15,250 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 300 transitions, 3097 flow [2024-06-04 14:43:15,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:15,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:15,250 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 14:43:15,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:43:15,250 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 14:43:15,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:15,250 INFO L85 PathProgramCache]: Analyzing trace with hash 440946362, now seen corresponding path program 4 times [2024-06-04 14:43:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:15,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757380525] [2024-06-04 14:43:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:15,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:15,809 INFO 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 14:43:15,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757380525] [2024-06-04 14:43:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757380525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:15,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:15,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:15,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226281009] [2024-06-04 14:43:15,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:15,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:15,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 300 transitions, 3097 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:15,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:15,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:15,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:16,985 INFO L124 PetriNetUnfolderBase]: 3553/5322 cut-off events. [2024-06-04 14:43:16,986 INFO L125 PetriNetUnfolderBase]: For 776817/776823 co-relation queries the response was YES. [2024-06-04 14:43:17,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49317 conditions, 5322 events. 3553/5322 cut-off events. For 776817/776823 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 26844 event pairs, 897 based on Foata normal form. 6/5324 useless extension candidates. Maximal degree in co-relation 49205. Up to 4858 conditions per place. [2024-06-04 14:43:17,037 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 231 selfloop transitions, 90 changer transitions 0/347 dead transitions. [2024-06-04 14:43:17,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 347 transitions, 4357 flow [2024-06-04 14:43:17,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:43:17,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:43:17,038 INFO L175 Difference]: Start difference. First operand has 231 places, 300 transitions, 3097 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:43:17,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 347 transitions, 4357 flow [2024-06-04 14:43:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 347 transitions, 4277 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:17,756 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 3541 flow [2024-06-04 14:43:17,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3541, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-04 14:43:17,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-04 14:43:17,757 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 3541 flow [2024-06-04 14:43:17,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:17,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:17,757 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 14:43:17,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:43:17,757 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 14:43:17,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -523221044, now seen corresponding path program 5 times [2024-06-04 14:43:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370351413] [2024-06-04 14:43:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:17,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:18,533 INFO 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 14:43:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:18,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370351413] [2024-06-04 14:43:18,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370351413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:18,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:18,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:18,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867135147] [2024-06-04 14:43:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:18,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:18,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 3541 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:18,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:18,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:18,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:19,765 INFO L124 PetriNetUnfolderBase]: 3632/5438 cut-off events. [2024-06-04 14:43:19,766 INFO L125 PetriNetUnfolderBase]: For 800558/800565 co-relation queries the response was YES. [2024-06-04 14:43:19,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51283 conditions, 5438 events. 3632/5438 cut-off events. For 800558/800565 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27565 event pairs, 906 based on Foata normal form. 6/5440 useless extension candidates. Maximal degree in co-relation 51168. Up to 4919 conditions per place. [2024-06-04 14:43:19,827 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 247 selfloop transitions, 104 changer transitions 0/377 dead transitions. [2024-06-04 14:43:19,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 377 transitions, 5063 flow [2024-06-04 14:43:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-04 14:43:19,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:43:19,828 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 3541 flow. Second operand 8 states and 156 transitions. [2024-06-04 14:43:19,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 377 transitions, 5063 flow [2024-06-04 14:43:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 377 transitions, 4948 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-04 14:43:20,821 INFO L231 Difference]: Finished difference. Result has 243 places, 352 transitions, 4220 flow [2024-06-04 14:43:20,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3456, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4220, PETRI_PLACES=243, PETRI_TRANSITIONS=352} [2024-06-04 14:43:20,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-04 14:43:20,823 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 352 transitions, 4220 flow [2024-06-04 14:43:20,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:20,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:20,824 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 14:43:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:43:20,824 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 14:43:20,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1050658374, now seen corresponding path program 1 times [2024-06-04 14:43:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002271729] [2024-06-04 14:43:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:21,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:21,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002271729] [2024-06-04 14:43:21,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002271729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:21,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:21,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:21,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73463056] [2024-06-04 14:43:21,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:21,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:21,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:21,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:43:21,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 352 transitions, 4220 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:21,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:21,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:43:21,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:22,680 INFO L124 PetriNetUnfolderBase]: 3799/5607 cut-off events. [2024-06-04 14:43:22,680 INFO L125 PetriNetUnfolderBase]: For 821408/821408 co-relation queries the response was YES. [2024-06-04 14:43:22,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53355 conditions, 5607 events. 3799/5607 cut-off events. For 821408/821408 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27696 event pairs, 927 based on Foata normal form. 1/5605 useless extension candidates. Maximal degree in co-relation 53235. Up to 5543 conditions per place. [2024-06-04 14:43:22,745 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 346 selfloop transitions, 25 changer transitions 0/374 dead transitions. [2024-06-04 14:43:22,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 374 transitions, 5242 flow [2024-06-04 14:43:22,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-04 14:43:22,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-04 14:43:22,747 INFO L175 Difference]: Start difference. First operand has 243 places, 352 transitions, 4220 flow. Second operand 7 states and 120 transitions. [2024-06-04 14:43:22,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 374 transitions, 5242 flow [2024-06-04 14:43:23,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 374 transitions, 5151 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 14:43:23,687 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 4271 flow [2024-06-04 14:43:23,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4271, PETRI_PLACES=247, PETRI_TRANSITIONS=358} [2024-06-04 14:43:23,688 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-04 14:43:23,688 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 4271 flow [2024-06-04 14:43:23,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:23,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:23,688 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 14:43:23,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:43:23,689 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 14:43:23,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1005753896, now seen corresponding path program 2 times [2024-06-04 14:43:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:23,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425468315] [2024-06-04 14:43:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:24,322 INFO 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 14:43:24,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425468315] [2024-06-04 14:43:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425468315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:24,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:24,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:24,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383834353] [2024-06-04 14:43:24,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:24,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:24,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:24,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:43:24,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 358 transitions, 4271 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:24,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:24,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:43:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:25,515 INFO L124 PetriNetUnfolderBase]: 3804/5614 cut-off events. [2024-06-04 14:43:25,515 INFO L125 PetriNetUnfolderBase]: For 844798/844798 co-relation queries the response was YES. [2024-06-04 14:43:25,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53834 conditions, 5614 events. 3804/5614 cut-off events. For 844798/844798 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 27822 event pairs, 927 based on Foata normal form. 1/5612 useless extension candidates. Maximal degree in co-relation 53713. Up to 5549 conditions per place. [2024-06-04 14:43:25,583 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 344 selfloop transitions, 27 changer transitions 0/374 dead transitions. [2024-06-04 14:43:25,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 374 transitions, 5247 flow [2024-06-04 14:43:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-04 14:43:25,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-04 14:43:25,584 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 4271 flow. Second operand 7 states and 118 transitions. [2024-06-04 14:43:25,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 374 transitions, 5247 flow [2024-06-04 14:43:26,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 374 transitions, 5174 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 14:43:26,409 INFO L231 Difference]: Finished difference. Result has 251 places, 361 transitions, 4304 flow [2024-06-04 14:43:26,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4304, PETRI_PLACES=251, PETRI_TRANSITIONS=361} [2024-06-04 14:43:26,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-04 14:43:26,410 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 361 transitions, 4304 flow [2024-06-04 14:43:26,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:26,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:26,411 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 14:43:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:43:26,411 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 14:43:26,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1005754144, now seen corresponding path program 1 times [2024-06-04 14:43:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700614795] [2024-06-04 14:43:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:27,111 INFO 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 14:43:27,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700614795] [2024-06-04 14:43:27,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700614795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:27,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:27,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414425010] [2024-06-04 14:43:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:27,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:27,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:27,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 361 transitions, 4304 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:28,428 INFO L124 PetriNetUnfolderBase]: 3669/5485 cut-off events. [2024-06-04 14:43:28,428 INFO L125 PetriNetUnfolderBase]: For 871788/871788 co-relation queries the response was YES. [2024-06-04 14:43:28,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53380 conditions, 5485 events. 3669/5485 cut-off events. For 871788/871788 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27641 event pairs, 919 based on Foata normal form. 3/5485 useless extension candidates. Maximal degree in co-relation 53257. Up to 5214 conditions per place. [2024-06-04 14:43:28,492 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 329 selfloop transitions, 27 changer transitions 0/385 dead transitions. [2024-06-04 14:43:28,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 385 transitions, 5304 flow [2024-06-04 14:43:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:43:28,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-04 14:43:28,493 INFO L175 Difference]: Start difference. First operand has 251 places, 361 transitions, 4304 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:43:28,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 385 transitions, 5304 flow [2024-06-04 14:43:29,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 385 transitions, 5242 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:29,527 INFO L231 Difference]: Finished difference. Result has 255 places, 367 transitions, 4392 flow [2024-06-04 14:43:29,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4392, PETRI_PLACES=255, PETRI_TRANSITIONS=367} [2024-06-04 14:43:29,528 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-04 14:43:29,528 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 367 transitions, 4392 flow [2024-06-04 14:43:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:29,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:29,528 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 14:43:29,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:43:29,528 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 14:43:29,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1507766948, now seen corresponding path program 2 times [2024-06-04 14:43:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845778139] [2024-06-04 14:43:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:29,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:30,277 INFO 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 14:43:30,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:30,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845778139] [2024-06-04 14:43:30,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845778139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:30,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:30,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:43:30,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496589172] [2024-06-04 14:43:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:30,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:43:30,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:43:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:43:30,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:30,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 367 transitions, 4392 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:30,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:30,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:30,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:31,666 INFO L124 PetriNetUnfolderBase]: 3684/5507 cut-off events. [2024-06-04 14:43:31,666 INFO L125 PetriNetUnfolderBase]: For 896176/896179 co-relation queries the response was YES. [2024-06-04 14:43:31,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 5507 events. 3684/5507 cut-off events. For 896176/896179 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27781 event pairs, 921 based on Foata normal form. 5/5508 useless extension candidates. Maximal degree in co-relation 54083. Up to 5228 conditions per place. [2024-06-04 14:43:31,724 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 324 selfloop transitions, 31 changer transitions 0/384 dead transitions. [2024-06-04 14:43:31,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 384 transitions, 5340 flow [2024-06-04 14:43:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:31,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:43:31,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-04 14:43:31,726 INFO L175 Difference]: Start difference. First operand has 255 places, 367 transitions, 4392 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:43:31,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 384 transitions, 5340 flow [2024-06-04 14:43:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 384 transitions, 5281 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 14:43:32,620 INFO L231 Difference]: Finished difference. Result has 259 places, 370 transitions, 4450 flow [2024-06-04 14:43:32,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4450, PETRI_PLACES=259, PETRI_TRANSITIONS=370} [2024-06-04 14:43:32,621 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-04 14:43:32,621 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 370 transitions, 4450 flow [2024-06-04 14:43:32,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:32,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:32,621 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 14:43:32,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:43:32,621 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 14:43:32,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1241929256, now seen corresponding path program 3 times [2024-06-04 14:43:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:32,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180811439] [2024-06-04 14:43:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:33,341 INFO 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 14:43:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:33,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180811439] [2024-06-04 14:43:33,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180811439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:33,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:33,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300001113] [2024-06-04 14:43:33,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:33,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:33,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:33,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:33,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:43:33,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 370 transitions, 4450 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:33,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:33,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:43:33,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:34,654 INFO L124 PetriNetUnfolderBase]: 3831/5653 cut-off events. [2024-06-04 14:43:34,654 INFO L125 PetriNetUnfolderBase]: For 910787/910790 co-relation queries the response was YES. [2024-06-04 14:43:34,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55334 conditions, 5653 events. 3831/5653 cut-off events. For 910787/910790 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27991 event pairs, 935 based on Foata normal form. 1/5650 useless extension candidates. Maximal degree in co-relation 55208. Up to 5588 conditions per place. [2024-06-04 14:43:34,723 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 349 selfloop transitions, 27 changer transitions 0/379 dead transitions. [2024-06-04 14:43:34,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 379 transitions, 5230 flow [2024-06-04 14:43:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 14:43:34,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-06-04 14:43:34,725 INFO L175 Difference]: Start difference. First operand has 259 places, 370 transitions, 4450 flow. Second operand 7 states and 114 transitions. [2024-06-04 14:43:34,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 379 transitions, 5230 flow [2024-06-04 14:43:35,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 379 transitions, 5125 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 14:43:35,892 INFO L231 Difference]: Finished difference. Result has 261 places, 370 transitions, 4405 flow [2024-06-04 14:43:35,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4405, PETRI_PLACES=261, PETRI_TRANSITIONS=370} [2024-06-04 14:43:35,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-04 14:43:35,893 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 370 transitions, 4405 flow [2024-06-04 14:43:35,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:35,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:35,893 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 14:43:35,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:43:35,893 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 14:43:35,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1241929504, now seen corresponding path program 3 times [2024-06-04 14:43:35,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:35,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72706335] [2024-06-04 14:43:35,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:35,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:36,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:36,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72706335] [2024-06-04 14:43:36,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72706335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:36,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:36,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:36,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914100980] [2024-06-04 14:43:36,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:36,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:36,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:36,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:36,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:36,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:36,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 370 transitions, 4405 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:36,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:36,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:36,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:37,917 INFO L124 PetriNetUnfolderBase]: 3672/5491 cut-off events. [2024-06-04 14:43:37,917 INFO L125 PetriNetUnfolderBase]: For 929143/929146 co-relation queries the response was YES. [2024-06-04 14:43:37,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54242 conditions, 5491 events. 3672/5491 cut-off events. For 929143/929146 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 27776 event pairs, 919 based on Foata normal form. 5/5492 useless extension candidates. Maximal degree in co-relation 54115. Up to 5218 conditions per place. [2024-06-04 14:43:37,987 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 30 changer transitions 0/385 dead transitions. [2024-06-04 14:43:37,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 385 transitions, 5163 flow [2024-06-04 14:43:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:43:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:43:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:43:37,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-04 14:43:37,989 INFO L175 Difference]: Start difference. First operand has 261 places, 370 transitions, 4405 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:43:37,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 385 transitions, 5163 flow [2024-06-04 14:43:39,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 385 transitions, 5059 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:39,329 INFO L231 Difference]: Finished difference. Result has 262 places, 370 transitions, 4367 flow [2024-06-04 14:43:39,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4367, PETRI_PLACES=262, PETRI_TRANSITIONS=370} [2024-06-04 14:43:39,329 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-04 14:43:39,329 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 370 transitions, 4367 flow [2024-06-04 14:43:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:39,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:39,330 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 14:43:39,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:43:39,330 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:39,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash 930731572, now seen corresponding path program 1 times [2024-06-04 14:43:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444835438] [2024-06-04 14:43:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:39,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:40,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:40,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444835438] [2024-06-04 14:43:40,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444835438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:40,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:40,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:43:40,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054515036] [2024-06-04 14:43:40,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:40,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:43:40,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:40,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:43:40,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:43:40,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:40,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 370 transitions, 4367 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:40,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:40,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:40,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:41,866 INFO L124 PetriNetUnfolderBase]: 3638/5548 cut-off events. [2024-06-04 14:43:41,867 INFO L125 PetriNetUnfolderBase]: For 1049607/1049614 co-relation queries the response was YES. [2024-06-04 14:43:41,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56926 conditions, 5548 events. 3638/5548 cut-off events. For 1049607/1049614 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29810 event pairs, 494 based on Foata normal form. 16/5539 useless extension candidates. Maximal degree in co-relation 56798. Up to 3366 conditions per place. [2024-06-04 14:43:41,938 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 251 selfloop transitions, 143 changer transitions 0/424 dead transitions. [2024-06-04 14:43:41,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 424 transitions, 5727 flow [2024-06-04 14:43:41,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:43:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:43:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-04 14:43:41,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-04 14:43:41,940 INFO L175 Difference]: Start difference. First operand has 262 places, 370 transitions, 4367 flow. Second operand 10 states and 213 transitions. [2024-06-04 14:43:41,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 424 transitions, 5727 flow [2024-06-04 14:43:43,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 424 transitions, 5642 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:43:43,176 INFO L231 Difference]: Finished difference. Result has 264 places, 372 transitions, 4644 flow [2024-06-04 14:43:43,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4644, PETRI_PLACES=264, PETRI_TRANSITIONS=372} [2024-06-04 14:43:43,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-04 14:43:43,177 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 372 transitions, 4644 flow [2024-06-04 14:43:43,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:43,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:43,177 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 14:43:43,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:43:43,178 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:43,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 988824022, now seen corresponding path program 2 times [2024-06-04 14:43:43,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:43,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857987850] [2024-06-04 14:43:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:43,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:44,353 INFO 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 14:43:44,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:44,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857987850] [2024-06-04 14:43:44,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857987850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:44,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:44,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:43:44,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924017874] [2024-06-04 14:43:44,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:44,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:43:44,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:44,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:43:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:43:44,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:44,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 372 transitions, 4644 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:44,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:44,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:44,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:45,977 INFO L124 PetriNetUnfolderBase]: 3851/5919 cut-off events. [2024-06-04 14:43:45,977 INFO L125 PetriNetUnfolderBase]: For 1143926/1143933 co-relation queries the response was YES. [2024-06-04 14:43:46,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62006 conditions, 5919 events. 3851/5919 cut-off events. For 1143926/1143933 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 32635 event pairs, 727 based on Foata normal form. 16/5916 useless extension candidates. Maximal degree in co-relation 61877. Up to 4159 conditions per place. [2024-06-04 14:43:46,056 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 249 selfloop transitions, 153 changer transitions 0/432 dead transitions. [2024-06-04 14:43:46,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 432 transitions, 6060 flow [2024-06-04 14:43:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:43:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:43:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 14:43:46,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-04 14:43:46,058 INFO L175 Difference]: Start difference. First operand has 264 places, 372 transitions, 4644 flow. Second operand 11 states and 236 transitions. [2024-06-04 14:43:46,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 432 transitions, 6060 flow [2024-06-04 14:43:47,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 432 transitions, 5877 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:43:47,539 INFO L231 Difference]: Finished difference. Result has 270 places, 375 transitions, 4887 flow [2024-06-04 14:43:47,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4887, PETRI_PLACES=270, PETRI_TRANSITIONS=375} [2024-06-04 14:43:47,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-04 14:43:47,540 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 375 transitions, 4887 flow [2024-06-04 14:43:47,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:47,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:47,540 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 14:43:47,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:43:47,540 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:47,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:47,541 INFO L85 PathProgramCache]: Analyzing trace with hash 988939342, now seen corresponding path program 3 times [2024-06-04 14:43:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100218196] [2024-06-04 14:43:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:48,806 INFO 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 14:43:48,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:48,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100218196] [2024-06-04 14:43:48,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100218196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:48,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:48,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:43:48,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393696271] [2024-06-04 14:43:48,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:48,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:43:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:48,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:43:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:43:48,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:48,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 375 transitions, 4887 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:48,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:48,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:48,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:50,586 INFO L124 PetriNetUnfolderBase]: 3909/6017 cut-off events. [2024-06-04 14:43:50,586 INFO L125 PetriNetUnfolderBase]: For 1180646/1180653 co-relation queries the response was YES. [2024-06-04 14:43:50,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63747 conditions, 6017 events. 3909/6017 cut-off events. For 1180646/1180653 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33419 event pairs, 743 based on Foata normal form. 16/6014 useless extension candidates. Maximal degree in co-relation 63615. Up to 4359 conditions per place. [2024-06-04 14:43:50,659 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 152 changer transitions 0/436 dead transitions. [2024-06-04 14:43:50,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 436 transitions, 6274 flow [2024-06-04 14:43:50,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:43:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:43:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-04 14:43:50,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753787878787879 [2024-06-04 14:43:50,660 INFO L175 Difference]: Start difference. First operand has 270 places, 375 transitions, 4887 flow. Second operand 12 states and 251 transitions. [2024-06-04 14:43:50,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 436 transitions, 6274 flow [2024-06-04 14:43:51,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 436 transitions, 6049 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:43:51,949 INFO L231 Difference]: Finished difference. Result has 275 places, 376 transitions, 5012 flow [2024-06-04 14:43:51,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5012, PETRI_PLACES=275, PETRI_TRANSITIONS=376} [2024-06-04 14:43:51,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-04 14:43:51,950 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 376 transitions, 5012 flow [2024-06-04 14:43:51,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:51,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:51,950 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 14:43:51,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:43:51,950 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:43:51,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash 988943992, now seen corresponding path program 4 times [2024-06-04 14:43:51,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:51,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218618539] [2024-06-04 14:43:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:51,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:43:53,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:53,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218618539] [2024-06-04 14:43:53,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218618539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:53,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:53,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:43:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250443816] [2024-06-04 14:43:53,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:43:53,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:43:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:43:53,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:43:53,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 376 transitions, 5012 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:53,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:53,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:43:53,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:55,186 INFO L124 PetriNetUnfolderBase]: 3857/5937 cut-off events. [2024-06-04 14:43:55,186 INFO L125 PetriNetUnfolderBase]: For 1167673/1167680 co-relation queries the response was YES. [2024-06-04 14:43:55,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61966 conditions, 5937 events. 3857/5937 cut-off events. For 1167673/1167680 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 32840 event pairs, 741 based on Foata normal form. 28/5946 useless extension candidates. Maximal degree in co-relation 61832. Up to 4479 conditions per place. [2024-06-04 14:43:55,266 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 254 selfloop transitions, 150 changer transitions 0/434 dead transitions. [2024-06-04 14:43:55,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 6076 flow [2024-06-04 14:43:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:43:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:43:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-04 14:43:55,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458041958041958 [2024-06-04 14:43:55,268 INFO L175 Difference]: Start difference. First operand has 275 places, 376 transitions, 5012 flow. Second operand 13 states and 262 transitions. [2024-06-04 14:43:55,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 6076 flow [2024-06-04 14:43:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 434 transitions, 5726 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-04 14:43:56,700 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4971 flow [2024-06-04 14:43:56,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4971, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-04 14:43:56,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-04 14:43:56,701 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4971 flow [2024-06-04 14:43:56,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:43:56,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:43:56,702 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 14:43:56,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:43:56,702 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 14:43:56,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:43:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash -95849523, now seen corresponding path program 1 times [2024-06-04 14:43:56,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:43:56,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117346880] [2024-06-04 14:43:56,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:43:56,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:43:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:43:57,553 INFO 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 14:43:57,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:43:57,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117346880] [2024-06-04 14:43:57,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117346880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:43:57,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:43:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:43:57,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553726216] [2024-06-04 14:43:57,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:43:57,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:43:57,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:43:57,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:43:57,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:43:57,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:43:57,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4971 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:43:57,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:43:57,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:43:57,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:43:59,050 INFO L124 PetriNetUnfolderBase]: 4179/6328 cut-off events. [2024-06-04 14:43:59,050 INFO L125 PetriNetUnfolderBase]: For 1151370/1151373 co-relation queries the response was YES. [2024-06-04 14:43:59,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64786 conditions, 6328 events. 4179/6328 cut-off events. For 1151370/1151373 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33842 event pairs, 1028 based on Foata normal form. 8/6325 useless extension candidates. Maximal degree in co-relation 64651. Up to 5766 conditions per place. [2024-06-04 14:43:59,138 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 128 changer transitions 0/417 dead transitions. [2024-06-04 14:43:59,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 417 transitions, 6545 flow [2024-06-04 14:43:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:43:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:43:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 14:43:59,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 14:43:59,140 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4971 flow. Second operand 7 states and 135 transitions. [2024-06-04 14:43:59,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 417 transitions, 6545 flow [2024-06-04 14:44:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 417 transitions, 6237 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-04 14:44:00,609 INFO L231 Difference]: Finished difference. Result has 274 places, 397 transitions, 5387 flow [2024-06-04 14:44:00,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4663, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5387, PETRI_PLACES=274, PETRI_TRANSITIONS=397} [2024-06-04 14:44:00,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-04 14:44:00,610 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 397 transitions, 5387 flow [2024-06-04 14:44:00,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:00,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:00,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:00,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:44:00,610 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 14:44:00,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash -88230963, now seen corresponding path program 2 times [2024-06-04 14:44:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808607692] [2024-06-04 14:44:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:01,439 INFO 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 14:44:01,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:01,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808607692] [2024-06-04 14:44:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808607692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:01,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:01,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:44:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586743904] [2024-06-04 14:44:01,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:44:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:44:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:44:01,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:01,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 397 transitions, 5387 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:01,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:01,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:01,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:02,935 INFO L124 PetriNetUnfolderBase]: 4167/6314 cut-off events. [2024-06-04 14:44:02,935 INFO L125 PetriNetUnfolderBase]: For 1156153/1156156 co-relation queries the response was YES. [2024-06-04 14:44:02,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64281 conditions, 6314 events. 4167/6314 cut-off events. For 1156153/1156156 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 33829 event pairs, 1035 based on Foata normal form. 6/6309 useless extension candidates. Maximal degree in co-relation 64144. Up to 5871 conditions per place. [2024-06-04 14:44:03,008 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 298 selfloop transitions, 85 changer transitions 0/412 dead transitions. [2024-06-04 14:44:03,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 6544 flow [2024-06-04 14:44:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:44:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:44:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:44:03,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-04 14:44:03,010 INFO L175 Difference]: Start difference. First operand has 274 places, 397 transitions, 5387 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:44:03,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 6544 flow [2024-06-04 14:44:04,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 412 transitions, 6276 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-04 14:44:04,460 INFO L231 Difference]: Finished difference. Result has 279 places, 398 transitions, 5362 flow [2024-06-04 14:44:04,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5362, PETRI_PLACES=279, PETRI_TRANSITIONS=398} [2024-06-04 14:44:04,461 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-04 14:44:04,461 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 398 transitions, 5362 flow [2024-06-04 14:44:04,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:04,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:04,461 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 14:44:04,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:44:04,461 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:04,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1019992358, now seen corresponding path program 5 times [2024-06-04 14:44:04,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:04,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071939426] [2024-06-04 14:44:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:04,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:05,850 INFO 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 14:44:05,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:05,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071939426] [2024-06-04 14:44:05,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071939426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:05,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:05,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428070978] [2024-06-04 14:44:05,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:06,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:06,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 398 transitions, 5362 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:06,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:06,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:06,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:07,518 INFO L124 PetriNetUnfolderBase]: 4004/6192 cut-off events. [2024-06-04 14:44:07,518 INFO L125 PetriNetUnfolderBase]: For 1235483/1235494 co-relation queries the response was YES. [2024-06-04 14:44:07,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64507 conditions, 6192 events. 4004/6192 cut-off events. For 1235483/1235494 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 34814 event pairs, 643 based on Foata normal form. 18/6204 useless extension candidates. Maximal degree in co-relation 64368. Up to 4395 conditions per place. [2024-06-04 14:44:07,591 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 267 selfloop transitions, 149 changer transitions 0/452 dead transitions. [2024-06-04 14:44:07,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 452 transitions, 6766 flow [2024-06-04 14:44:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 14:44:07,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-04 14:44:07,593 INFO L175 Difference]: Start difference. First operand has 279 places, 398 transitions, 5362 flow. Second operand 10 states and 218 transitions. [2024-06-04 14:44:07,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 452 transitions, 6766 flow [2024-06-04 14:44:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 452 transitions, 6651 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 14:44:09,012 INFO L231 Difference]: Finished difference. Result has 285 places, 400 transitions, 5629 flow [2024-06-04 14:44:09,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5629, PETRI_PLACES=285, PETRI_TRANSITIONS=400} [2024-06-04 14:44:09,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-04 14:44:09,013 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 400 transitions, 5629 flow [2024-06-04 14:44:09,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:09,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:09,013 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 14:44:09,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:44:09,014 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:09,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1019877038, now seen corresponding path program 6 times [2024-06-04 14:44:09,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:09,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134525813] [2024-06-04 14:44:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:10,322 INFO 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 14:44:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:10,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134525813] [2024-06-04 14:44:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134525813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:10,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047368759] [2024-06-04 14:44:10,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:10,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:10,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:10,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:10,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 400 transitions, 5629 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:10,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:10,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:10,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:12,321 INFO L124 PetriNetUnfolderBase]: 4212/6538 cut-off events. [2024-06-04 14:44:12,322 INFO L125 PetriNetUnfolderBase]: For 1339903/1339910 co-relation queries the response was YES. [2024-06-04 14:44:12,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69248 conditions, 6538 events. 4212/6538 cut-off events. For 1339903/1339910 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 37368 event pairs, 815 based on Foata normal form. 18/6552 useless extension candidates. Maximal degree in co-relation 69108. Up to 5019 conditions per place. [2024-06-04 14:44:12,406 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 276 selfloop transitions, 144 changer transitions 0/456 dead transitions. [2024-06-04 14:44:12,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 456 transitions, 7065 flow [2024-06-04 14:44:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 14:44:12,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-04 14:44:12,408 INFO L175 Difference]: Start difference. First operand has 285 places, 400 transitions, 5629 flow. Second operand 10 states and 218 transitions. [2024-06-04 14:44:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 456 transitions, 7065 flow [2024-06-04 14:44:13,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 456 transitions, 6833 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:13,968 INFO L231 Difference]: Finished difference. Result has 290 places, 404 transitions, 5797 flow [2024-06-04 14:44:13,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5797, PETRI_PLACES=290, PETRI_TRANSITIONS=404} [2024-06-04 14:44:13,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-04 14:44:13,969 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 404 transitions, 5797 flow [2024-06-04 14:44:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:13,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:13,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:44:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:44:13,970 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:13,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1019872388, now seen corresponding path program 7 times [2024-06-04 14:44:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:13,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020697427] [2024-06-04 14:44:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:15,144 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 14:44:15,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:15,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020697427] [2024-06-04 14:44:15,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020697427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502028788] [2024-06-04 14:44:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:15,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:15,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 404 transitions, 5797 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:15,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:15,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:15,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:16,950 INFO L124 PetriNetUnfolderBase]: 4176/6482 cut-off events. [2024-06-04 14:44:16,951 INFO L125 PetriNetUnfolderBase]: For 1321596/1321603 co-relation queries the response was YES. [2024-06-04 14:44:17,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67989 conditions, 6482 events. 4176/6482 cut-off events. For 1321596/1321603 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37019 event pairs, 817 based on Foata normal form. 22/6500 useless extension candidates. Maximal degree in co-relation 67846. Up to 5119 conditions per place. [2024-06-04 14:44:17,029 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 272 selfloop transitions, 142 changer transitions 0/450 dead transitions. [2024-06-04 14:44:17,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 450 transitions, 6815 flow [2024-06-04 14:44:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:17,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 14:44:17,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-04 14:44:17,032 INFO L175 Difference]: Start difference. First operand has 290 places, 404 transitions, 5797 flow. Second operand 10 states and 212 transitions. [2024-06-04 14:44:17,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 450 transitions, 6815 flow [2024-06-04 14:44:19,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 450 transitions, 6592 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:19,278 INFO L231 Difference]: Finished difference. Result has 294 places, 404 transitions, 5865 flow [2024-06-04 14:44:19,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5574, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5865, PETRI_PLACES=294, PETRI_TRANSITIONS=404} [2024-06-04 14:44:19,279 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-04 14:44:19,279 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 404 transitions, 5865 flow [2024-06-04 14:44:19,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:19,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:19,279 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 14:44:19,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:44:19,280 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:19,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1488443870, now seen corresponding path program 8 times [2024-06-04 14:44:19,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:19,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892888458] [2024-06-04 14:44:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:19,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:20,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:20,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892888458] [2024-06-04 14:44:20,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892888458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:20,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:20,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463486297] [2024-06-04 14:44:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:20,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:20,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:20,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 404 transitions, 5865 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:20,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:20,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:20,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:22,357 INFO L124 PetriNetUnfolderBase]: 4229/6577 cut-off events. [2024-06-04 14:44:22,358 INFO L125 PetriNetUnfolderBase]: For 1339569/1339579 co-relation queries the response was YES. [2024-06-04 14:44:22,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68799 conditions, 6577 events. 4229/6577 cut-off events. For 1339569/1339579 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 37795 event pairs, 860 based on Foata normal form. 22/6593 useless extension candidates. Maximal degree in co-relation 68654. Up to 5448 conditions per place. [2024-06-04 14:44:22,442 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 294 selfloop transitions, 121 changer transitions 0/451 dead transitions. [2024-06-04 14:44:22,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 451 transitions, 7213 flow [2024-06-04 14:44:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 14:44:22,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-04 14:44:22,444 INFO L175 Difference]: Start difference. First operand has 294 places, 404 transitions, 5865 flow. Second operand 10 states and 212 transitions. [2024-06-04 14:44:22,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 451 transitions, 7213 flow [2024-06-04 14:44:24,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 451 transitions, 6930 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:24,638 INFO L231 Difference]: Finished difference. Result has 296 places, 405 transitions, 5869 flow [2024-06-04 14:44:24,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5869, PETRI_PLACES=296, PETRI_TRANSITIONS=405} [2024-06-04 14:44:24,638 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-04 14:44:24,639 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 405 transitions, 5869 flow [2024-06-04 14:44:24,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:24,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:24,639 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 14:44:24,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:44:24,639 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:24,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1488448520, now seen corresponding path program 9 times [2024-06-04 14:44:24,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:24,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261071549] [2024-06-04 14:44:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:24,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:25,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:25,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261071549] [2024-06-04 14:44:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261071549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:25,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:25,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:25,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958950697] [2024-06-04 14:44:25,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:25,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:25,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:26,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:26,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 405 transitions, 5869 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:26,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:26,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:27,716 INFO L124 PetriNetUnfolderBase]: 4420/6896 cut-off events. [2024-06-04 14:44:27,716 INFO L125 PetriNetUnfolderBase]: For 1435599/1435606 co-relation queries the response was YES. [2024-06-04 14:44:27,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72752 conditions, 6896 events. 4420/6896 cut-off events. For 1435599/1435606 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 40318 event pairs, 865 based on Foata normal form. 18/6910 useless extension candidates. Maximal degree in co-relation 72606. Up to 5487 conditions per place. [2024-06-04 14:44:27,808 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 124 changer transitions 0/458 dead transitions. [2024-06-04 14:44:27,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 458 transitions, 7595 flow [2024-06-04 14:44:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-04 14:44:27,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-04 14:44:27,810 INFO L175 Difference]: Start difference. First operand has 296 places, 405 transitions, 5869 flow. Second operand 10 states and 216 transitions. [2024-06-04 14:44:27,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 458 transitions, 7595 flow [2024-06-04 14:44:29,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 458 transitions, 7340 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:29,790 INFO L231 Difference]: Finished difference. Result has 298 places, 407 transitions, 5946 flow [2024-06-04 14:44:29,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5946, PETRI_PLACES=298, PETRI_TRANSITIONS=407} [2024-06-04 14:44:29,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-04 14:44:29,792 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 407 transitions, 5946 flow [2024-06-04 14:44:29,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:29,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:29,792 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 14:44:29,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:44:29,792 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:29,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1315781000, now seen corresponding path program 10 times [2024-06-04 14:44:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:29,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661150035] [2024-06-04 14:44:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:31,057 INFO 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 14:44:31,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:31,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661150035] [2024-06-04 14:44:31,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661150035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:31,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:31,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:31,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73693746] [2024-06-04 14:44:31,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:31,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:31,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:31,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 407 transitions, 5946 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:31,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:31,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:31,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:32,788 INFO L124 PetriNetUnfolderBase]: 4478/6997 cut-off events. [2024-06-04 14:44:32,788 INFO L125 PetriNetUnfolderBase]: For 1469721/1469728 co-relation queries the response was YES. [2024-06-04 14:44:32,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73378 conditions, 6997 events. 4478/6997 cut-off events. For 1469721/1469728 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41063 event pairs, 965 based on Foata normal form. 20/7011 useless extension candidates. Maximal degree in co-relation 73231. Up to 5879 conditions per place. [2024-06-04 14:44:32,887 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 313 selfloop transitions, 102 changer transitions 0/451 dead transitions. [2024-06-04 14:44:32,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 451 transitions, 7296 flow [2024-06-04 14:44:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-04 14:44:32,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-04 14:44:32,897 INFO L175 Difference]: Start difference. First operand has 298 places, 407 transitions, 5946 flow. Second operand 10 states and 205 transitions. [2024-06-04 14:44:32,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 451 transitions, 7296 flow [2024-06-04 14:44:35,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 451 transitions, 7100 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 14:44:35,145 INFO L231 Difference]: Finished difference. Result has 301 places, 408 transitions, 6003 flow [2024-06-04 14:44:35,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6003, PETRI_PLACES=301, PETRI_TRANSITIONS=408} [2024-06-04 14:44:35,145 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-04 14:44:35,145 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 408 transitions, 6003 flow [2024-06-04 14:44:35,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:35,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:35,146 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 14:44:35,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:44:35,146 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:35,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1322214740, now seen corresponding path program 11 times [2024-06-04 14:44:35,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:35,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368975867] [2024-06-04 14:44:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:35,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:36,333 INFO 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 14:44:36,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:36,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368975867] [2024-06-04 14:44:36,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368975867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:36,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:36,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:36,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876290843] [2024-06-04 14:44:36,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:36,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:36,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:36,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:36,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:36,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 408 transitions, 6003 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:36,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:36,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:36,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:38,343 INFO L124 PetriNetUnfolderBase]: 4669/7316 cut-off events. [2024-06-04 14:44:38,343 INFO L125 PetriNetUnfolderBase]: For 1569407/1569410 co-relation queries the response was YES. [2024-06-04 14:44:38,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77696 conditions, 7316 events. 4669/7316 cut-off events. For 1569407/1569410 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 43687 event pairs, 970 based on Foata normal form. 16/7328 useless extension candidates. Maximal degree in co-relation 77548. Up to 5853 conditions per place. [2024-06-04 14:44:38,452 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 311 selfloop transitions, 112 changer transitions 0/459 dead transitions. [2024-06-04 14:44:38,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 459 transitions, 7749 flow [2024-06-04 14:44:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 14:44:38,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-04 14:44:38,453 INFO L175 Difference]: Start difference. First operand has 301 places, 408 transitions, 6003 flow. Second operand 10 states and 212 transitions. [2024-06-04 14:44:38,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 459 transitions, 7749 flow [2024-06-04 14:44:40,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 459 transitions, 7528 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:40,609 INFO L231 Difference]: Finished difference. Result has 303 places, 410 transitions, 6098 flow [2024-06-04 14:44:40,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6098, PETRI_PLACES=303, PETRI_TRANSITIONS=410} [2024-06-04 14:44:40,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-04 14:44:40,610 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 410 transitions, 6098 flow [2024-06-04 14:44:40,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:40,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:40,611 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 14:44:40,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:44:40,611 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:40,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1488270890, now seen corresponding path program 12 times [2024-06-04 14:44:40,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:40,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990469999] [2024-06-04 14:44:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:40,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:41,919 INFO 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 14:44:41,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:41,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990469999] [2024-06-04 14:44:41,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990469999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:41,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:41,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:41,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024536738] [2024-06-04 14:44:41,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:41,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:41,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:41,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:41,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:42,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:42,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 410 transitions, 6098 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:42,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:42,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:42,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:43,785 INFO L124 PetriNetUnfolderBase]: 4628/7254 cut-off events. [2024-06-04 14:44:43,785 INFO L125 PetriNetUnfolderBase]: For 1553664/1553671 co-relation queries the response was YES. [2024-06-04 14:44:43,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76115 conditions, 7254 events. 4628/7254 cut-off events. For 1553664/1553671 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43361 event pairs, 949 based on Foata normal form. 22/7272 useless extension candidates. Maximal degree in co-relation 75966. Up to 6138 conditions per place. [2024-06-04 14:44:43,891 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 303 selfloop transitions, 116 changer transitions 0/455 dead transitions. [2024-06-04 14:44:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 455 transitions, 7430 flow [2024-06-04 14:44:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-04 14:44:43,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-04 14:44:43,893 INFO L175 Difference]: Start difference. First operand has 303 places, 410 transitions, 6098 flow. Second operand 10 states and 209 transitions. [2024-06-04 14:44:43,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 455 transitions, 7430 flow [2024-06-04 14:44:46,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 7254 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:44:46,049 INFO L231 Difference]: Finished difference. Result has 307 places, 410 transitions, 6161 flow [2024-06-04 14:44:46,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6161, PETRI_PLACES=307, PETRI_TRANSITIONS=410} [2024-06-04 14:44:46,049 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-04 14:44:46,049 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 410 transitions, 6161 flow [2024-06-04 14:44:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:46,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:46,050 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 14:44:46,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:44:46,050 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:46,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1284084412, now seen corresponding path program 13 times [2024-06-04 14:44:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:46,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646507746] [2024-06-04 14:44:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:46,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:47,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:47,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646507746] [2024-06-04 14:44:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646507746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:47,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:47,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:47,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195967397] [2024-06-04 14:44:47,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:47,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:47,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 410 transitions, 6161 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:47,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:47,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:47,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:49,078 INFO L124 PetriNetUnfolderBase]: 4708/7385 cut-off events. [2024-06-04 14:44:49,078 INFO L125 PetriNetUnfolderBase]: For 1585455/1585458 co-relation queries the response was YES. [2024-06-04 14:44:49,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77344 conditions, 7385 events. 4708/7385 cut-off events. For 1585455/1585458 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 44326 event pairs, 968 based on Foata normal form. 20/7401 useless extension candidates. Maximal degree in co-relation 77193. Up to 6213 conditions per place. [2024-06-04 14:44:49,188 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 310 selfloop transitions, 109 changer transitions 0/455 dead transitions. [2024-06-04 14:44:49,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 455 transitions, 7533 flow [2024-06-04 14:44:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-04 14:44:49,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-04 14:44:49,189 INFO L175 Difference]: Start difference. First operand has 307 places, 410 transitions, 6161 flow. Second operand 10 states and 208 transitions. [2024-06-04 14:44:49,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 455 transitions, 7533 flow [2024-06-04 14:44:51,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 455 transitions, 7300 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:51,334 INFO L231 Difference]: Finished difference. Result has 309 places, 411 transitions, 6193 flow [2024-06-04 14:44:51,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6193, PETRI_PLACES=309, PETRI_TRANSITIONS=411} [2024-06-04 14:44:51,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-04 14:44:51,334 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 411 transitions, 6193 flow [2024-06-04 14:44:51,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:51,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:51,335 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 14:44:51,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:44:51,335 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:44:51,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:51,335 INFO L85 PathProgramCache]: Analyzing trace with hash -848996978, now seen corresponding path program 14 times [2024-06-04 14:44:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:51,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585717162] [2024-06-04 14:44:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:51,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:52,596 INFO 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 14:44:52,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:52,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585717162] [2024-06-04 14:44:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585717162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:52,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:44:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339237624] [2024-06-04 14:44:52,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:44:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:44:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:44:52,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:44:52,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 411 transitions, 6193 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:52,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:52,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:44:52,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:54,398 INFO L124 PetriNetUnfolderBase]: 4672/7329 cut-off events. [2024-06-04 14:44:54,399 INFO L125 PetriNetUnfolderBase]: For 1553279/1553282 co-relation queries the response was YES. [2024-06-04 14:44:54,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75766 conditions, 7329 events. 4672/7329 cut-off events. For 1553279/1553282 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43944 event pairs, 960 based on Foata normal form. 20/7345 useless extension candidates. Maximal degree in co-relation 75614. Up to 6236 conditions per place. [2024-06-04 14:44:54,509 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 323 selfloop transitions, 94 changer transitions 0/453 dead transitions. [2024-06-04 14:44:54,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 7201 flow [2024-06-04 14:44:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:44:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:44:54,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 14:44:54,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-04 14:44:54,511 INFO L175 Difference]: Start difference. First operand has 309 places, 411 transitions, 6193 flow. Second operand 10 states and 204 transitions. [2024-06-04 14:44:54,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 7201 flow [2024-06-04 14:44:57,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 453 transitions, 6958 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 14:44:57,195 INFO L231 Difference]: Finished difference. Result has 311 places, 411 transitions, 6145 flow [2024-06-04 14:44:57,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5950, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6145, PETRI_PLACES=311, PETRI_TRANSITIONS=411} [2024-06-04 14:44:57,196 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-04 14:44:57,196 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 411 transitions, 6145 flow [2024-06-04 14:44:57,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:44:57,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:44:57,196 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 14:44:57,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:44:57,196 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 14:44:57,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:44:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash -99662771, now seen corresponding path program 1 times [2024-06-04 14:44:57,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:44:57,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566302546] [2024-06-04 14:44:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:44:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:44:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:44:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:44:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:44:58,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566302546] [2024-06-04 14:44:58,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566302546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:44:58,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:44:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:44:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649766912] [2024-06-04 14:44:58,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:44:58,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:44:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:44:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:44:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:44:58,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:44:58,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 411 transitions, 6145 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:44:58,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:44:58,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:44:58,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:44:59,904 INFO L124 PetriNetUnfolderBase]: 5086/7834 cut-off events. [2024-06-04 14:44:59,905 INFO L125 PetriNetUnfolderBase]: For 1528031/1528038 co-relation queries the response was YES. [2024-06-04 14:44:59,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78941 conditions, 7834 events. 5086/7834 cut-off events. For 1528031/1528038 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 45430 event pairs, 1324 based on Foata normal form. 6/7808 useless extension candidates. Maximal degree in co-relation 78788. Up to 7163 conditions per place. [2024-06-04 14:45:00,025 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 272 selfloop transitions, 145 changer transitions 0/447 dead transitions. [2024-06-04 14:45:00,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 447 transitions, 7605 flow [2024-06-04 14:45:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-04 14:45:00,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-04 14:45:00,026 INFO L175 Difference]: Start difference. First operand has 311 places, 411 transitions, 6145 flow. Second operand 8 states and 159 transitions. [2024-06-04 14:45:00,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 447 transitions, 7605 flow [2024-06-04 14:45:02,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 447 transitions, 7402 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:45:02,770 INFO L231 Difference]: Finished difference. Result has 310 places, 419 transitions, 6399 flow [2024-06-04 14:45:02,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6399, PETRI_PLACES=310, PETRI_TRANSITIONS=419} [2024-06-04 14:45:02,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-04 14:45:02,771 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 419 transitions, 6399 flow [2024-06-04 14:45:02,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:02,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:02,771 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 14:45:02,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:45:02,772 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 14:45:02,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash -99334078, now seen corresponding path program 1 times [2024-06-04 14:45:02,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:02,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523665916] [2024-06-04 14:45:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:03,731 INFO 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 14:45:03,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:03,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523665916] [2024-06-04 14:45:03,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523665916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:03,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:03,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:03,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999526] [2024-06-04 14:45:03,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:03,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:03,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:03,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:03,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 419 transitions, 6399 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:03,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:03,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:03,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:05,487 INFO L124 PetriNetUnfolderBase]: 5227/8032 cut-off events. [2024-06-04 14:45:05,487 INFO L125 PetriNetUnfolderBase]: For 1632914/1632917 co-relation queries the response was YES. [2024-06-04 14:45:05,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82156 conditions, 8032 events. 5227/8032 cut-off events. For 1632914/1632917 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46650 event pairs, 1353 based on Foata normal form. 8/8008 useless extension candidates. Maximal degree in co-relation 82002. Up to 7357 conditions per place. [2024-06-04 14:45:05,608 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 327 selfloop transitions, 108 changer transitions 0/465 dead transitions. [2024-06-04 14:45:05,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 465 transitions, 7982 flow [2024-06-04 14:45:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:45:05,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:45:05,609 INFO L175 Difference]: Start difference. First operand has 310 places, 419 transitions, 6399 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:45:05,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 465 transitions, 7982 flow [2024-06-04 14:45:08,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 465 transitions, 7614 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-04 14:45:09,001 INFO L231 Difference]: Finished difference. Result has 316 places, 440 transitions, 6628 flow [2024-06-04 14:45:09,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6628, PETRI_PLACES=316, PETRI_TRANSITIONS=440} [2024-06-04 14:45:09,001 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-04 14:45:09,001 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 440 transitions, 6628 flow [2024-06-04 14:45:09,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:09,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:09,002 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 14:45:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:45:09,002 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 14:45:09,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash -791869285, now seen corresponding path program 2 times [2024-06-04 14:45:09,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:09,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516884846] [2024-06-04 14:45:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:10,020 INFO 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 14:45:10,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:10,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516884846] [2024-06-04 14:45:10,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516884846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:10,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:10,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470129303] [2024-06-04 14:45:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:10,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:10,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 440 transitions, 6628 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:10,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:10,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:10,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:11,828 INFO L124 PetriNetUnfolderBase]: 5237/8043 cut-off events. [2024-06-04 14:45:11,828 INFO L125 PetriNetUnfolderBase]: For 1649362/1649369 co-relation queries the response was YES. [2024-06-04 14:45:11,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83400 conditions, 8043 events. 5237/8043 cut-off events. For 1649362/1649369 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46763 event pairs, 1330 based on Foata normal form. 6/8017 useless extension candidates. Maximal degree in co-relation 83243. Up to 7459 conditions per place. [2024-06-04 14:45:11,949 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 292 selfloop transitions, 143 changer transitions 0/465 dead transitions. [2024-06-04 14:45:11,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 465 transitions, 7816 flow [2024-06-04 14:45:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 14:45:11,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-04 14:45:11,950 INFO L175 Difference]: Start difference. First operand has 316 places, 440 transitions, 6628 flow. Second operand 8 states and 151 transitions. [2024-06-04 14:45:11,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 465 transitions, 7816 flow [2024-06-04 14:45:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 465 transitions, 7710 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-04 14:45:14,472 INFO L231 Difference]: Finished difference. Result has 321 places, 444 transitions, 6884 flow [2024-06-04 14:45:14,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6884, PETRI_PLACES=321, PETRI_TRANSITIONS=444} [2024-06-04 14:45:14,480 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-04 14:45:14,481 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 444 transitions, 6884 flow [2024-06-04 14:45:14,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:14,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:14,481 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 14:45:14,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:45:14,481 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 14:45:14,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -88221508, now seen corresponding path program 2 times [2024-06-04 14:45:14,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222127222] [2024-06-04 14:45:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:15,438 INFO 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 14:45:15,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:15,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222127222] [2024-06-04 14:45:15,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222127222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:15,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:15,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:15,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611596889] [2024-06-04 14:45:15,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:15,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:15,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:15,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 444 transitions, 6884 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:15,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:15,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:15,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:17,583 INFO L124 PetriNetUnfolderBase]: 5369/8228 cut-off events. [2024-06-04 14:45:17,583 INFO L125 PetriNetUnfolderBase]: For 1757575/1757578 co-relation queries the response was YES. [2024-06-04 14:45:17,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86452 conditions, 8228 events. 5369/8228 cut-off events. For 1757575/1757578 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 47880 event pairs, 1363 based on Foata normal form. 8/8204 useless extension candidates. Maximal degree in co-relation 86293. Up to 7466 conditions per place. [2024-06-04 14:45:17,682 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 347 selfloop transitions, 102 changer transitions 0/479 dead transitions. [2024-06-04 14:45:17,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 479 transitions, 8641 flow [2024-06-04 14:45:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:45:17,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-04 14:45:17,684 INFO L175 Difference]: Start difference. First operand has 321 places, 444 transitions, 6884 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:45:17,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 479 transitions, 8641 flow [2024-06-04 14:45:20,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 479 transitions, 8325 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:20,344 INFO L231 Difference]: Finished difference. Result has 325 places, 455 transitions, 6991 flow [2024-06-04 14:45:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6568, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6991, PETRI_PLACES=325, PETRI_TRANSITIONS=455} [2024-06-04 14:45:20,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-04 14:45:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 455 transitions, 6991 flow [2024-06-04 14:45:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:20,345 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 14:45:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:45:20,345 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 14:45:20,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash -88234931, now seen corresponding path program 3 times [2024-06-04 14:45:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:20,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528582991] [2024-06-04 14:45:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:21,395 INFO 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 14:45:21,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:21,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528582991] [2024-06-04 14:45:21,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528582991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:21,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:21,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559780843] [2024-06-04 14:45:21,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:21,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:21,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:21,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:21,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:21,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 455 transitions, 6991 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:21,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:21,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:21,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:23,346 INFO L124 PetriNetUnfolderBase]: 5381/8245 cut-off events. [2024-06-04 14:45:23,346 INFO L125 PetriNetUnfolderBase]: For 1771115/1771118 co-relation queries the response was YES. [2024-06-04 14:45:23,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87037 conditions, 8245 events. 5381/8245 cut-off events. For 1771115/1771118 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 48012 event pairs, 1377 based on Foata normal form. 4/8217 useless extension candidates. Maximal degree in co-relation 86876. Up to 7786 conditions per place. [2024-06-04 14:45:23,461 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 354 selfloop transitions, 90 changer transitions 0/474 dead transitions. [2024-06-04 14:45:23,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 474 transitions, 8375 flow [2024-06-04 14:45:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-04 14:45:23,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 14:45:23,463 INFO L175 Difference]: Start difference. First operand has 325 places, 455 transitions, 6991 flow. Second operand 9 states and 154 transitions. [2024-06-04 14:45:23,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 474 transitions, 8375 flow [2024-06-04 14:45:26,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 8152 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 14:45:26,251 INFO L231 Difference]: Finished difference. Result has 329 places, 459 transitions, 7028 flow [2024-06-04 14:45:26,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7028, PETRI_PLACES=329, PETRI_TRANSITIONS=459} [2024-06-04 14:45:26,251 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-04 14:45:26,251 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 459 transitions, 7028 flow [2024-06-04 14:45:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:26,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:26,252 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 14:45:26,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:45:26,252 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 14:45:26,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -588719806, now seen corresponding path program 3 times [2024-06-04 14:45:26,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:26,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246877923] [2024-06-04 14:45:26,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:26,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:27,142 INFO 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 14:45:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:27,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246877923] [2024-06-04 14:45:27,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246877923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:27,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:27,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:45:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358907179] [2024-06-04 14:45:27,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:27,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:45:27,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:45:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:45:27,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:27,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 459 transitions, 7028 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:27,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:27,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:27,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:29,178 INFO L124 PetriNetUnfolderBase]: 5369/8230 cut-off events. [2024-06-04 14:45:29,179 INFO L125 PetriNetUnfolderBase]: For 1793120/1793123 co-relation queries the response was YES. [2024-06-04 14:45:29,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 8230 events. 5369/8230 cut-off events. For 1793120/1793123 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 47861 event pairs, 1367 based on Foata normal form. 8/8206 useless extension candidates. Maximal degree in co-relation 86015. Up to 7479 conditions per place. [2024-06-04 14:45:29,309 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 352 selfloop transitions, 102 changer transitions 0/484 dead transitions. [2024-06-04 14:45:29,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 484 transitions, 8438 flow [2024-06-04 14:45:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:45:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:45:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:45:29,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-04 14:45:29,310 INFO L175 Difference]: Start difference. First operand has 329 places, 459 transitions, 7028 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:45:29,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 484 transitions, 8438 flow [2024-06-04 14:45:32,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 484 transitions, 8276 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 14:45:32,122 INFO L231 Difference]: Finished difference. Result has 333 places, 460 transitions, 7109 flow [2024-06-04 14:45:32,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7109, PETRI_PLACES=333, PETRI_TRANSITIONS=460} [2024-06-04 14:45:32,123 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-04 14:45:32,123 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 460 transitions, 7109 flow [2024-06-04 14:45:32,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:32,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:32,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:45:32,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:45:32,124 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 14:45:32,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash -260407327, now seen corresponding path program 3 times [2024-06-04 14:45:32,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:32,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833959842] [2024-06-04 14:45:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:32,865 INFO 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 14:45:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833959842] [2024-06-04 14:45:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833959842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:32,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134047098] [2024-06-04 14:45:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:32,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:32,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 460 transitions, 7109 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:32,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:32,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:32,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:34,807 INFO L124 PetriNetUnfolderBase]: 5351/8202 cut-off events. [2024-06-04 14:45:34,807 INFO L125 PetriNetUnfolderBase]: For 1796578/1796578 co-relation queries the response was YES. [2024-06-04 14:45:34,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86256 conditions, 8202 events. 5351/8202 cut-off events. For 1796578/1796578 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47693 event pairs, 1387 based on Foata normal form. 2/8173 useless extension candidates. Maximal degree in co-relation 86093. Up to 7942 conditions per place. [2024-06-04 14:45:34,940 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 416 selfloop transitions, 30 changer transitions 0/476 dead transitions. [2024-06-04 14:45:34,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 8259 flow [2024-06-04 14:45:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:45:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:45:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 14:45:34,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:45:34,942 INFO L175 Difference]: Start difference. First operand has 333 places, 460 transitions, 7109 flow. Second operand 7 states and 126 transitions. [2024-06-04 14:45:34,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 8259 flow [2024-06-04 14:45:38,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 476 transitions, 8039 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:38,108 INFO L231 Difference]: Finished difference. Result has 334 places, 460 transitions, 6958 flow [2024-06-04 14:45:38,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6958, PETRI_PLACES=334, PETRI_TRANSITIONS=460} [2024-06-04 14:45:38,109 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-04 14:45:38,109 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 460 transitions, 6958 flow [2024-06-04 14:45:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:38,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:38,109 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 14:45:38,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:45:38,109 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 14:45:38,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2011992837, now seen corresponding path program 4 times [2024-06-04 14:45:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110646090] [2024-06-04 14:45:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:38,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110646090] [2024-06-04 14:45:38,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110646090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:38,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:38,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:38,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969482068] [2024-06-04 14:45:38,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:38,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:38,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:38,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 460 transitions, 6958 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:38,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:38,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:38,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:40,836 INFO L124 PetriNetUnfolderBase]: 5356/8209 cut-off events. [2024-06-04 14:45:40,836 INFO L125 PetriNetUnfolderBase]: For 1823833/1823833 co-relation queries the response was YES. [2024-06-04 14:45:40,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86218 conditions, 8209 events. 5356/8209 cut-off events. For 1823833/1823833 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47781 event pairs, 1379 based on Foata normal form. 1/8179 useless extension candidates. Maximal degree in co-relation 86054. Up to 7969 conditions per place. [2024-06-04 14:45:40,991 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 424 selfloop transitions, 21 changer transitions 0/475 dead transitions. [2024-06-04 14:45:40,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 475 transitions, 7964 flow [2024-06-04 14:45:40,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:45:40,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-04 14:45:40,993 INFO L175 Difference]: Start difference. First operand has 334 places, 460 transitions, 6958 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:45:40,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 475 transitions, 7964 flow [2024-06-04 14:45:44,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 475 transitions, 7737 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:44,453 INFO L231 Difference]: Finished difference. Result has 336 places, 463 transitions, 6859 flow [2024-06-04 14:45:44,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6859, PETRI_PLACES=336, PETRI_TRANSITIONS=463} [2024-06-04 14:45:44,456 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-04 14:45:44,456 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 463 transitions, 6859 flow [2024-06-04 14:45:44,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:44,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:44,457 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 14:45:44,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:45:44,457 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 14:45:44,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash 494653487, now seen corresponding path program 5 times [2024-06-04 14:45:44,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:44,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447095253] [2024-06-04 14:45:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:45,167 INFO 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 14:45:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:45,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447095253] [2024-06-04 14:45:45,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447095253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:45,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:45,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:45,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377945968] [2024-06-04 14:45:45,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:45,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:45,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:45,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:45,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:45,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 463 transitions, 6859 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:45,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:45,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:45,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:47,086 INFO L124 PetriNetUnfolderBase]: 5353/8206 cut-off events. [2024-06-04 14:45:47,086 INFO L125 PetriNetUnfolderBase]: For 1849480/1849483 co-relation queries the response was YES. [2024-06-04 14:45:47,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86149 conditions, 8206 events. 5353/8206 cut-off events. For 1849480/1849483 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47760 event pairs, 1389 based on Foata normal form. 3/8177 useless extension candidates. Maximal degree in co-relation 85985. Up to 7965 conditions per place. [2024-06-04 14:45:47,234 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 421 selfloop transitions, 21 changer transitions 0/472 dead transitions. [2024-06-04 14:45:47,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 472 transitions, 7771 flow [2024-06-04 14:45:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:45:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:45:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:45:47,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-04 14:45:47,236 INFO L175 Difference]: Start difference. First operand has 336 places, 463 transitions, 6859 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:45:47,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 472 transitions, 7771 flow [2024-06-04 14:45:51,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 7697 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:45:51,530 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 6833 flow [2024-06-04 14:45:51,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6785, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6833, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-04 14:45:51,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-04 14:45:51,544 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 6833 flow [2024-06-04 14:45:51,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:51,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:51,545 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 14:45:51,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:45:51,545 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 14:45:51,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:51,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1774179861, now seen corresponding path program 6 times [2024-06-04 14:45:51,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:51,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68568342] [2024-06-04 14:45:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:45:52,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:52,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68568342] [2024-06-04 14:45:52,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68568342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:52,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:52,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:45:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699747213] [2024-06-04 14:45:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:52,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:45:52,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:45:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:45:52,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:52,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 6833 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:52,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:52,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:52,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:45:54,238 INFO L124 PetriNetUnfolderBase]: 5345/8195 cut-off events. [2024-06-04 14:45:54,238 INFO L125 PetriNetUnfolderBase]: For 1877711/1877714 co-relation queries the response was YES. [2024-06-04 14:45:54,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86143 conditions, 8195 events. 5345/8195 cut-off events. For 1877711/1877714 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 47685 event pairs, 1389 based on Foata normal form. 4/8167 useless extension candidates. Maximal degree in co-relation 85978. Up to 7932 conditions per place. [2024-06-04 14:45:54,371 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 412 selfloop transitions, 30 changer transitions 0/472 dead transitions. [2024-06-04 14:45:54,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 472 transitions, 7745 flow [2024-06-04 14:45:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:45:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:45:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-04 14:45:54,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:45:54,372 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 6833 flow. Second operand 7 states and 121 transitions. [2024-06-04 14:45:54,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 472 transitions, 7745 flow [2024-06-04 14:45:58,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 472 transitions, 7669 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 14:45:58,153 INFO L231 Difference]: Finished difference. Result has 338 places, 463 transitions, 6825 flow [2024-06-04 14:45:58,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6757, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6825, PETRI_PLACES=338, PETRI_TRANSITIONS=463} [2024-06-04 14:45:58,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-04 14:45:58,154 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 463 transitions, 6825 flow [2024-06-04 14:45:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:58,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:45:58,154 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 14:45:58,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:45:58,154 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:45:58,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:45:58,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1161228368, now seen corresponding path program 1 times [2024-06-04 14:45:58,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:45:58,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862761516] [2024-06-04 14:45:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:45:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:45:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:45:59,276 INFO 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 14:45:59,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:45:59,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862761516] [2024-06-04 14:45:59,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862761516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:45:59,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:45:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:45:59,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406883608] [2024-06-04 14:45:59,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:45:59,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:45:59,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:45:59,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:45:59,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:45:59,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:45:59,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 463 transitions, 6825 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:45:59,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:45:59,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:45:59,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:01,549 INFO L124 PetriNetUnfolderBase]: 5420/8298 cut-off events. [2024-06-04 14:46:01,549 INFO L125 PetriNetUnfolderBase]: For 1943580/1943583 co-relation queries the response was YES. [2024-06-04 14:46:01,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87547 conditions, 8298 events. 5420/8298 cut-off events. For 1943580/1943583 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 48276 event pairs, 1311 based on Foata normal form. 4/8287 useless extension candidates. Maximal degree in co-relation 87381. Up to 7913 conditions per place. [2024-06-04 14:46:01,658 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 430 selfloop transitions, 33 changer transitions 0/502 dead transitions. [2024-06-04 14:46:01,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 7977 flow [2024-06-04 14:46:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:01,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-04 14:46:01,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:46:01,660 INFO L175 Difference]: Start difference. First operand has 338 places, 463 transitions, 6825 flow. Second operand 10 states and 180 transitions. [2024-06-04 14:46:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 7977 flow [2024-06-04 14:46:04,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 502 transitions, 7907 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 14:46:04,669 INFO L231 Difference]: Finished difference. Result has 343 places, 468 transitions, 6932 flow [2024-06-04 14:46:04,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6932, PETRI_PLACES=343, PETRI_TRANSITIONS=468} [2024-06-04 14:46:04,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-04 14:46:04,669 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 468 transitions, 6932 flow [2024-06-04 14:46:04,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:04,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:04,670 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 14:46:04,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:46:04,670 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 14:46:04,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1749991166, now seen corresponding path program 4 times [2024-06-04 14:46:04,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:04,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125870978] [2024-06-04 14:46:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:04,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:05,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:05,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125870978] [2024-06-04 14:46:05,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125870978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:05,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:05,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:46:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232836284] [2024-06-04 14:46:05,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:46:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:46:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:46:05,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:05,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 468 transitions, 6932 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:05,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:05,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:05,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:08,072 INFO L124 PetriNetUnfolderBase]: 5653/8627 cut-off events. [2024-06-04 14:46:08,072 INFO L125 PetriNetUnfolderBase]: For 2079676/2079679 co-relation queries the response was YES. [2024-06-04 14:46:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92153 conditions, 8627 events. 5653/8627 cut-off events. For 2079676/2079679 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50410 event pairs, 1323 based on Foata normal form. 8/8603 useless extension candidates. Maximal degree in co-relation 91985. Up to 7677 conditions per place. [2024-06-04 14:46:08,195 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 378 selfloop transitions, 147 changer transitions 0/555 dead transitions. [2024-06-04 14:46:08,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 555 transitions, 9493 flow [2024-06-04 14:46:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:46:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:46:08,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 14:46:08,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:46:08,196 INFO L175 Difference]: Start difference. First operand has 343 places, 468 transitions, 6932 flow. Second operand 9 states and 176 transitions. [2024-06-04 14:46:08,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 555 transitions, 9493 flow [2024-06-04 14:46:12,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 555 transitions, 9370 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:12,287 INFO L231 Difference]: Finished difference. Result has 349 places, 512 transitions, 7944 flow [2024-06-04 14:46:12,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6809, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7944, PETRI_PLACES=349, PETRI_TRANSITIONS=512} [2024-06-04 14:46:12,288 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-04 14:46:12,288 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 512 transitions, 7944 flow [2024-06-04 14:46:12,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:12,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:12,288 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 14:46:12,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:46:12,288 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:12,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:12,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1161474632, now seen corresponding path program 15 times [2024-06-04 14:46:12,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:12,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857160302] [2024-06-04 14:46:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:12,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:13,466 INFO 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 14:46:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:13,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857160302] [2024-06-04 14:46:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857160302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:13,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:13,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471157803] [2024-06-04 14:46:13,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:13,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:46:13,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 512 transitions, 7944 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:46:13,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:13,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:46:13,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:15,860 INFO L124 PetriNetUnfolderBase]: 5333/8274 cut-off events. [2024-06-04 14:46:15,860 INFO L125 PetriNetUnfolderBase]: For 2204044/2204052 co-relation queries the response was YES. [2024-06-04 14:46:15,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92941 conditions, 8274 events. 5333/8274 cut-off events. For 2204044/2204052 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 50250 event pairs, 1199 based on Foata normal form. 22/8265 useless extension candidates. Maximal degree in co-relation 92768. Up to 7520 conditions per place. [2024-06-04 14:46:15,996 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 463 selfloop transitions, 49 changer transitions 0/554 dead transitions. [2024-06-04 14:46:15,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 554 transitions, 9534 flow [2024-06-04 14:46:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-04 14:46:16,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:46:16,004 INFO L175 Difference]: Start difference. First operand has 349 places, 512 transitions, 7944 flow. Second operand 10 states and 198 transitions. [2024-06-04 14:46:16,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 554 transitions, 9534 flow [2024-06-04 14:46:19,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 554 transitions, 9397 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-04 14:46:19,757 INFO L231 Difference]: Finished difference. Result has 357 places, 513 transitions, 7958 flow [2024-06-04 14:46:19,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7958, PETRI_PLACES=357, PETRI_TRANSITIONS=513} [2024-06-04 14:46:19,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-04 14:46:19,757 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 513 transitions, 7958 flow [2024-06-04 14:46:19,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:46:19,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:19,758 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 14:46:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:46:19,758 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 14:46:19,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1042314047, now seen corresponding path program 1 times [2024-06-04 14:46:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:19,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685843524] [2024-06-04 14:46:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:20,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:20,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685843524] [2024-06-04 14:46:20,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685843524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:20,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:20,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:46:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600109093] [2024-06-04 14:46:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:20,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:46:20,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:46:20,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:46:20,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:20,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 513 transitions, 7958 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 14:46:20,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:20,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:20,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:23,243 INFO L124 PetriNetUnfolderBase]: 5775/8821 cut-off events. [2024-06-04 14:46:23,243 INFO L125 PetriNetUnfolderBase]: For 2169953/2169956 co-relation queries the response was YES. [2024-06-04 14:46:23,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95931 conditions, 8821 events. 5775/8821 cut-off events. For 2169953/2169956 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51927 event pairs, 1385 based on Foata normal form. 8/8788 useless extension candidates. Maximal degree in co-relation 95756. Up to 7951 conditions per place. [2024-06-04 14:46:23,384 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 401 selfloop transitions, 135 changer transitions 0/566 dead transitions. [2024-06-04 14:46:23,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 566 transitions, 10166 flow [2024-06-04 14:46:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 14:46:23,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-04 14:46:23,386 INFO L175 Difference]: Start difference. First operand has 357 places, 513 transitions, 7958 flow. Second operand 10 states and 182 transitions. [2024-06-04 14:46:23,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 566 transitions, 10166 flow [2024-06-04 14:46:27,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 566 transitions, 10047 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 14:46:27,933 INFO L231 Difference]: Finished difference. Result has 361 places, 526 transitions, 8369 flow [2024-06-04 14:46:27,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7839, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8369, PETRI_PLACES=361, PETRI_TRANSITIONS=526} [2024-06-04 14:46:27,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-04 14:46:27,934 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 526 transitions, 8369 flow [2024-06-04 14:46:27,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 14:46:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:27,934 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 14:46:27,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:46:27,934 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:27,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:27,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1130901422, now seen corresponding path program 2 times [2024-06-04 14:46:27,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:27,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46267159] [2024-06-04 14:46:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:27,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:29,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:29,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46267159] [2024-06-04 14:46:29,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46267159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:29,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:29,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:29,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466428079] [2024-06-04 14:46:29,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:29,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:29,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:29,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:29,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:29,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:29,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 526 transitions, 8369 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:29,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:29,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:29,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:31,508 INFO L124 PetriNetUnfolderBase]: 5855/8927 cut-off events. [2024-06-04 14:46:31,508 INFO L125 PetriNetUnfolderBase]: For 2218696/2218701 co-relation queries the response was YES. [2024-06-04 14:46:31,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98200 conditions, 8927 events. 5855/8927 cut-off events. For 2218696/2218701 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52489 event pairs, 1434 based on Foata normal form. 4/8901 useless extension candidates. Maximal degree in co-relation 98022. Up to 8492 conditions per place. [2024-06-04 14:46:31,664 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 482 selfloop transitions, 45 changer transitions 0/566 dead transitions. [2024-06-04 14:46:31,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 566 transitions, 9675 flow [2024-06-04 14:46:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 14:46:31,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-04 14:46:31,666 INFO L175 Difference]: Start difference. First operand has 361 places, 526 transitions, 8369 flow. Second operand 10 states and 182 transitions. [2024-06-04 14:46:31,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 566 transitions, 9675 flow [2024-06-04 14:46:35,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 566 transitions, 9497 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 14:46:35,597 INFO L231 Difference]: Finished difference. Result has 369 places, 531 transitions, 8401 flow [2024-06-04 14:46:35,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8192, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8401, PETRI_PLACES=369, PETRI_TRANSITIONS=531} [2024-06-04 14:46:35,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-04 14:46:35,598 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 531 transitions, 8401 flow [2024-06-04 14:46:35,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:35,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:35,599 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 14:46:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:46:35,599 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 14:46:35,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:35,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1473607715, now seen corresponding path program 2 times [2024-06-04 14:46:35,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:35,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148315215] [2024-06-04 14:46:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:36,466 INFO 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 14:46:36,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:36,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148315215] [2024-06-04 14:46:36,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148315215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:36,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:36,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:46:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236958023] [2024-06-04 14:46:36,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:36,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:46:36,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:36,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:46:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:46:36,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:36,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 531 transitions, 8401 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 14:46:36,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:36,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:36,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:38,950 INFO L124 PetriNetUnfolderBase]: 5822/8890 cut-off events. [2024-06-04 14:46:38,950 INFO L125 PetriNetUnfolderBase]: For 2251786/2251789 co-relation queries the response was YES. [2024-06-04 14:46:39,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98108 conditions, 8890 events. 5822/8890 cut-off events. For 2251786/2251789 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52325 event pairs, 1364 based on Foata normal form. 8/8857 useless extension candidates. Maximal degree in co-relation 97927. Up to 8000 conditions per place. [2024-06-04 14:46:39,108 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 409 selfloop transitions, 138 changer transitions 0/577 dead transitions. [2024-06-04 14:46:39,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 577 transitions, 10580 flow [2024-06-04 14:46:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-04 14:46:39,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-04 14:46:39,110 INFO L175 Difference]: Start difference. First operand has 369 places, 531 transitions, 8401 flow. Second operand 10 states and 185 transitions. [2024-06-04 14:46:39,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 577 transitions, 10580 flow [2024-06-04 14:46:42,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 577 transitions, 10425 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:42,859 INFO L231 Difference]: Finished difference. Result has 372 places, 535 transitions, 8606 flow [2024-06-04 14:46:42,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8606, PETRI_PLACES=372, PETRI_TRANSITIONS=535} [2024-06-04 14:46:42,859 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-04 14:46:42,859 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 535 transitions, 8606 flow [2024-06-04 14:46:42,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 14:46:42,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:42,860 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 14:46:42,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:46:42,860 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:42,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2094944832, now seen corresponding path program 3 times [2024-06-04 14:46:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690028983] [2024-06-04 14:46:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:42,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:43,989 INFO 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 14:46:43,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:43,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690028983] [2024-06-04 14:46:43,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690028983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:43,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:43,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:46:43,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721540587] [2024-06-04 14:46:43,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:43,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:46:43,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:46:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:46:44,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:46:44,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 535 transitions, 8606 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:44,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:44,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:46:44,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:46,451 INFO L124 PetriNetUnfolderBase]: 5892/8984 cut-off events. [2024-06-04 14:46:46,451 INFO L125 PetriNetUnfolderBase]: For 2293492/2293497 co-relation queries the response was YES. [2024-06-04 14:46:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99687 conditions, 8984 events. 5892/8984 cut-off events. For 2293492/2293497 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 52862 event pairs, 1440 based on Foata normal form. 4/8958 useless extension candidates. Maximal degree in co-relation 99505. Up to 8662 conditions per place. [2024-06-04 14:46:46,615 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 507 selfloop transitions, 23 changer transitions 0/569 dead transitions. [2024-06-04 14:46:46,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 569 transitions, 9866 flow [2024-06-04 14:46:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 14:46:46,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-04 14:46:46,616 INFO L175 Difference]: Start difference. First operand has 372 places, 535 transitions, 8606 flow. Second operand 10 states and 175 transitions. [2024-06-04 14:46:46,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 569 transitions, 9866 flow [2024-06-04 14:46:50,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 569 transitions, 9672 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:46:50,450 INFO L231 Difference]: Finished difference. Result has 377 places, 537 transitions, 8545 flow [2024-06-04 14:46:50,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8412, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=377, PETRI_TRANSITIONS=537} [2024-06-04 14:46:50,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-04 14:46:50,450 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 537 transitions, 8545 flow [2024-06-04 14:46:50,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:46:50,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:50,451 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 14:46:50,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:46:50,451 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:50,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:50,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1379755244, now seen corresponding path program 16 times [2024-06-04 14:46:50,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:50,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860331759] [2024-06-04 14:46:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:50,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:46:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:51,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860331759] [2024-06-04 14:46:51,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860331759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:51,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:51,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056261639] [2024-06-04 14:46:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:51,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:51,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:51,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:46:52,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:46:52,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 537 transitions, 8545 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:46:52,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:46:52,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:46:52,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:46:54,280 INFO L124 PetriNetUnfolderBase]: 5542/8595 cut-off events. [2024-06-04 14:46:54,281 INFO L125 PetriNetUnfolderBase]: For 2403803/2403811 co-relation queries the response was YES. [2024-06-04 14:46:54,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97206 conditions, 8595 events. 5542/8595 cut-off events. For 2403803/2403811 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52584 event pairs, 1245 based on Foata normal form. 22/8581 useless extension candidates. Maximal degree in co-relation 97023. Up to 7870 conditions per place. [2024-06-04 14:46:54,433 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 490 selfloop transitions, 44 changer transitions 0/577 dead transitions. [2024-06-04 14:46:54,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 577 transitions, 9825 flow [2024-06-04 14:46:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:46:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:46:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 14:46:54,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-04 14:46:54,434 INFO L175 Difference]: Start difference. First operand has 377 places, 537 transitions, 8545 flow. Second operand 10 states and 194 transitions. [2024-06-04 14:46:54,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 577 transitions, 9825 flow [2024-06-04 14:46:58,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 577 transitions, 9714 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:46:58,814 INFO L231 Difference]: Finished difference. Result has 380 places, 538 transitions, 8577 flow [2024-06-04 14:46:58,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8577, PETRI_PLACES=380, PETRI_TRANSITIONS=538} [2024-06-04 14:46:58,815 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-04 14:46:58,815 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 538 transitions, 8577 flow [2024-06-04 14:46:58,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:46:58,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:46:58,815 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 14:46:58,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:46:58,816 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:46:58,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:46:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1167903722, now seen corresponding path program 17 times [2024-06-04 14:46:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:46:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160383085] [2024-06-04 14:46:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:46:58,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:46:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:46:59,944 INFO 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 14:46:59,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:46:59,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160383085] [2024-06-04 14:46:59,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160383085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:46:59,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:46:59,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:46:59,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512454511] [2024-06-04 14:46:59,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:46:59,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:46:59,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:46:59,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:46:59,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:00,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:47:00,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 538 transitions, 8577 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:47:00,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:00,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:47:00,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:02,504 INFO L124 PetriNetUnfolderBase]: 5650/8789 cut-off events. [2024-06-04 14:47:02,505 INFO L125 PetriNetUnfolderBase]: For 2507588/2507596 co-relation queries the response was YES. [2024-06-04 14:47:02,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98592 conditions, 8789 events. 5650/8789 cut-off events. For 2507588/2507596 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54151 event pairs, 1263 based on Foata normal form. 38/8791 useless extension candidates. Maximal degree in co-relation 98408. Up to 7760 conditions per place. [2024-06-04 14:47:02,682 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 484 selfloop transitions, 58 changer transitions 0/585 dead transitions. [2024-06-04 14:47:02,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 9959 flow [2024-06-04 14:47:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:47:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:47:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-04 14:47:02,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-04 14:47:02,683 INFO L175 Difference]: Start difference. First operand has 380 places, 538 transitions, 8577 flow. Second operand 11 states and 214 transitions. [2024-06-04 14:47:02,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 9959 flow [2024-06-04 14:47:07,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 585 transitions, 9848 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:07,272 INFO L231 Difference]: Finished difference. Result has 383 places, 540 transitions, 8692 flow [2024-06-04 14:47:07,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8466, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8692, PETRI_PLACES=383, PETRI_TRANSITIONS=540} [2024-06-04 14:47:07,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-04 14:47:07,273 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 540 transitions, 8692 flow [2024-06-04 14:47:07,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:47:07,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:07,273 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 14:47:07,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:47:07,274 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:07,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1167908372, now seen corresponding path program 18 times [2024-06-04 14:47:07,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:07,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063507779] [2024-06-04 14:47:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:08,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:08,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063507779] [2024-06-04 14:47:08,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063507779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:08,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:08,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:08,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286927929] [2024-06-04 14:47:08,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:08,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:47:08,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 540 transitions, 8692 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:47:08,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:08,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:47:08,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:11,002 INFO L124 PetriNetUnfolderBase]: 5794/9029 cut-off events. [2024-06-04 14:47:11,002 INFO L125 PetriNetUnfolderBase]: For 2538983/2538991 co-relation queries the response was YES. [2024-06-04 14:47:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102003 conditions, 9029 events. 5794/9029 cut-off events. For 2538983/2538991 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 56041 event pairs, 1273 based on Foata normal form. 18/9011 useless extension candidates. Maximal degree in co-relation 101818. Up to 7481 conditions per place. [2024-06-04 14:47:11,163 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 473 selfloop transitions, 72 changer transitions 0/588 dead transitions. [2024-06-04 14:47:11,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 588 transitions, 10808 flow [2024-06-04 14:47:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-04 14:47:11,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-04 14:47:11,165 INFO L175 Difference]: Start difference. First operand has 383 places, 540 transitions, 8692 flow. Second operand 10 states and 202 transitions. [2024-06-04 14:47:11,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 588 transitions, 10808 flow [2024-06-04 14:47:15,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 588 transitions, 10595 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-04 14:47:15,889 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 8743 flow [2024-06-04 14:47:15,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8489, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8743, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-04 14:47:15,890 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-04 14:47:15,890 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 8743 flow [2024-06-04 14:47:15,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:47:15,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:15,890 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 14:47:15,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:47:15,890 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1799647150, now seen corresponding path program 4 times [2024-06-04 14:47:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489251625] [2024-06-04 14:47:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:15,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:47:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489251625] [2024-06-04 14:47:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489251625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:17,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:17,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:17,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841340658] [2024-06-04 14:47:17,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:17,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:17,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:47:17,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 8743 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:17,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:17,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:47:17,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:19,655 INFO L124 PetriNetUnfolderBase]: 6264/9604 cut-off events. [2024-06-04 14:47:19,655 INFO L125 PetriNetUnfolderBase]: For 2466634/2466639 co-relation queries the response was YES. [2024-06-04 14:47:19,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105141 conditions, 9604 events. 6264/9604 cut-off events. For 2466634/2466639 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 57793 event pairs, 1570 based on Foata normal form. 4/9578 useless extension candidates. Maximal degree in co-relation 104954. Up to 9255 conditions per place. [2024-06-04 14:47:19,819 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 513 selfloop transitions, 28 changer transitions 0/580 dead transitions. [2024-06-04 14:47:19,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 580 transitions, 10076 flow [2024-06-04 14:47:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-04 14:47:19,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40454545454545454 [2024-06-04 14:47:19,820 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 8743 flow. Second operand 10 states and 178 transitions. [2024-06-04 14:47:19,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 580 transitions, 10076 flow [2024-06-04 14:47:24,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 580 transitions, 9633 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-04 14:47:24,498 INFO L231 Difference]: Finished difference. Result has 386 places, 547 transitions, 8500 flow [2024-06-04 14:47:24,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8500, PETRI_PLACES=386, PETRI_TRANSITIONS=547} [2024-06-04 14:47:24,499 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-04 14:47:24,499 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 547 transitions, 8500 flow [2024-06-04 14:47:24,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:24,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:24,504 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 14:47:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:47:24,504 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:24,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1416736950, now seen corresponding path program 19 times [2024-06-04 14:47:24,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:24,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905139784] [2024-06-04 14:47:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:25,591 INFO 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 14:47:25,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:25,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905139784] [2024-06-04 14:47:25,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905139784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:25,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:25,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:25,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981627926] [2024-06-04 14:47:25,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:25,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:25,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:25,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:47:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 547 transitions, 8500 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:47:25,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:25,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:47:25,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:28,353 INFO L124 PetriNetUnfolderBase]: 5682/8874 cut-off events. [2024-06-04 14:47:28,353 INFO L125 PetriNetUnfolderBase]: For 2460804/2460812 co-relation queries the response was YES. [2024-06-04 14:47:28,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95365 conditions, 8874 events. 5682/8874 cut-off events. For 2460804/2460812 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 55097 event pairs, 1246 based on Foata normal form. 38/8876 useless extension candidates. Maximal degree in co-relation 95179. Up to 8061 conditions per place. [2024-06-04 14:47:28,512 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 500 selfloop transitions, 43 changer transitions 0/587 dead transitions. [2024-06-04 14:47:28,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 587 transitions, 10132 flow [2024-06-04 14:47:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 14:47:28,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-04 14:47:28,513 INFO L175 Difference]: Start difference. First operand has 386 places, 547 transitions, 8500 flow. Second operand 10 states and 193 transitions. [2024-06-04 14:47:28,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 587 transitions, 10132 flow [2024-06-04 14:47:33,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 587 transitions, 9969 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-04 14:47:33,710 INFO L231 Difference]: Finished difference. Result has 389 places, 547 transitions, 8433 flow [2024-06-04 14:47:33,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8433, PETRI_PLACES=389, PETRI_TRANSITIONS=547} [2024-06-04 14:47:33,710 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-04 14:47:33,710 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 547 transitions, 8433 flow [2024-06-04 14:47:33,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states 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 14:47:33,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:33,711 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 14:47:33,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:47:33,711 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:33,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1504428260, now seen corresponding path program 1 times [2024-06-04 14:47:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:33,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712114648] [2024-06-04 14:47:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:33,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:34,828 INFO 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 14:47:34,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:34,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712114648] [2024-06-04 14:47:34,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712114648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:34,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:34,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:47:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660395016] [2024-06-04 14:47:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:34,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:47:34,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:47:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:47:34,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:47:34,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 547 transitions, 8433 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:34,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:34,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:47:34,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:37,368 INFO L124 PetriNetUnfolderBase]: 6206/9513 cut-off events. [2024-06-04 14:47:37,368 INFO L125 PetriNetUnfolderBase]: For 2329232/2329240 co-relation queries the response was YES. [2024-06-04 14:47:37,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99169 conditions, 9513 events. 6206/9513 cut-off events. For 2329232/2329240 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 57155 event pairs, 1518 based on Foata normal form. 4/9486 useless extension candidates. Maximal degree in co-relation 98982. Up to 9158 conditions per place. [2024-06-04 14:47:37,533 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 508 selfloop transitions, 31 changer transitions 0/578 dead transitions. [2024-06-04 14:47:37,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 578 transitions, 9662 flow [2024-06-04 14:47:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:47:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:47:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:47:37,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:47:37,535 INFO L175 Difference]: Start difference. First operand has 389 places, 547 transitions, 8433 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:47:37,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 578 transitions, 9662 flow [2024-06-04 14:47:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 578 transitions, 9550 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:43,833 INFO L231 Difference]: Finished difference. Result has 390 places, 550 transitions, 8442 flow [2024-06-04 14:47:43,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8442, PETRI_PLACES=390, PETRI_TRANSITIONS=550} [2024-06-04 14:47:43,833 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-04 14:47:43,834 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 550 transitions, 8442 flow [2024-06-04 14:47:43,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:43,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:43,834 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 14:47:43,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:47:43,834 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:43,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1504071760, now seen corresponding path program 5 times [2024-06-04 14:47:43,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:43,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895284033] [2024-06-04 14:47:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:44,904 INFO 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 14:47:44,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:44,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895284033] [2024-06-04 14:47:44,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895284033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:44,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:44,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:47:44,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001646606] [2024-06-04 14:47:44,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:44,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:47:44,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:44,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:47:44,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:47:45,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:47:45,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 550 transitions, 8442 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:45,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:45,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:47:45,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:47,781 INFO L124 PetriNetUnfolderBase]: 6223/9539 cut-off events. [2024-06-04 14:47:47,782 INFO L125 PetriNetUnfolderBase]: For 2379470/2379475 co-relation queries the response was YES. [2024-06-04 14:47:47,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99679 conditions, 9539 events. 6223/9539 cut-off events. For 2379470/2379475 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 57216 event pairs, 1487 based on Foata normal form. 4/9513 useless extension candidates. Maximal degree in co-relation 99491. Up to 9203 conditions per place. [2024-06-04 14:47:47,935 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 521 selfloop transitions, 24 changer transitions 0/584 dead transitions. [2024-06-04 14:47:47,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 584 transitions, 9728 flow [2024-06-04 14:47:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-04 14:47:47,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-04 14:47:47,937 INFO L175 Difference]: Start difference. First operand has 390 places, 550 transitions, 8442 flow. Second operand 10 states and 175 transitions. [2024-06-04 14:47:47,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 584 transitions, 9728 flow [2024-06-04 14:47:54,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 584 transitions, 9661 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 14:47:54,162 INFO L231 Difference]: Finished difference. Result has 392 places, 552 transitions, 8508 flow [2024-06-04 14:47:54,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8375, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8508, PETRI_PLACES=392, PETRI_TRANSITIONS=552} [2024-06-04 14:47:54,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-04 14:47:54,162 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 552 transitions, 8508 flow [2024-06-04 14:47:54,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:54,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:47:54,163 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 14:47:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:47:54,163 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:47:54,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:47:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1043058036, now seen corresponding path program 6 times [2024-06-04 14:47:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:47:54,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687023560] [2024-06-04 14:47:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:47:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:47:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:47:55,419 INFO 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 14:47:55,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:47:55,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687023560] [2024-06-04 14:47:55,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687023560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:47:55,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:47:55,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:47:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687838649] [2024-06-04 14:47:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:47:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:47:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:47:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:47:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:47:55,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:47:55,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 552 transitions, 8508 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:47:55,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:47:55,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:47:55,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:47:58,682 INFO L124 PetriNetUnfolderBase]: 6215/9527 cut-off events. [2024-06-04 14:47:58,682 INFO L125 PetriNetUnfolderBase]: For 2401384/2401389 co-relation queries the response was YES. [2024-06-04 14:47:58,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99651 conditions, 9527 events. 6215/9527 cut-off events. For 2401384/2401389 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 57257 event pairs, 1513 based on Foata normal form. 4/9501 useless extension candidates. Maximal degree in co-relation 99462. Up to 9169 conditions per place. [2024-06-04 14:47:58,816 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 517 selfloop transitions, 30 changer transitions 0/586 dead transitions. [2024-06-04 14:47:58,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 586 transitions, 9804 flow [2024-06-04 14:47:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:47:58,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:47:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-04 14:47:58,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 14:47:58,817 INFO L175 Difference]: Start difference. First operand has 392 places, 552 transitions, 8508 flow. Second operand 10 states and 176 transitions. [2024-06-04 14:47:58,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 586 transitions, 9804 flow [2024-06-04 14:48:04,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 586 transitions, 9689 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-04 14:48:04,379 INFO L231 Difference]: Finished difference. Result has 394 places, 554 transitions, 8545 flow [2024-06-04 14:48:04,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8545, PETRI_PLACES=394, PETRI_TRANSITIONS=554} [2024-06-04 14:48:04,380 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-04 14:48:04,380 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 554 transitions, 8545 flow [2024-06-04 14:48:04,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:04,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:04,380 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 14:48:04,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:48:04,381 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:04,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -160610116, now seen corresponding path program 5 times [2024-06-04 14:48:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:04,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061658845] [2024-06-04 14:48:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:05,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:05,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061658845] [2024-06-04 14:48:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061658845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:05,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:05,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434115559] [2024-06-04 14:48:05,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:05,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:05,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:05,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 554 transitions, 8545 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:05,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:05,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:05,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:08,369 INFO L124 PetriNetUnfolderBase]: 6284/9628 cut-off events. [2024-06-04 14:48:08,370 INFO L125 PetriNetUnfolderBase]: For 2523428/2523431 co-relation queries the response was YES. [2024-06-04 14:48:08,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102180 conditions, 9628 events. 6284/9628 cut-off events. For 2523428/2523431 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57879 event pairs, 1587 based on Foata normal form. 8/9597 useless extension candidates. Maximal degree in co-relation 101990. Up to 9139 conditions per place. [2024-06-04 14:48:08,605 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 497 selfloop transitions, 63 changer transitions 0/590 dead transitions. [2024-06-04 14:48:08,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 590 transitions, 10568 flow [2024-06-04 14:48:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:48:08,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-04 14:48:08,606 INFO L175 Difference]: Start difference. First operand has 394 places, 554 transitions, 8545 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:48:08,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 590 transitions, 10568 flow [2024-06-04 14:48:13,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 590 transitions, 10444 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-04 14:48:13,698 INFO L231 Difference]: Finished difference. Result has 395 places, 571 transitions, 8926 flow [2024-06-04 14:48:13,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8421, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8926, PETRI_PLACES=395, PETRI_TRANSITIONS=571} [2024-06-04 14:48:13,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-04 14:48:13,706 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 571 transitions, 8926 flow [2024-06-04 14:48:13,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:13,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:13,715 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 14:48:13,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:48:13,715 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:13,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1774183829, now seen corresponding path program 4 times [2024-06-04 14:48:13,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:13,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872930285] [2024-06-04 14:48:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:14,912 INFO 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 14:48:14,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:14,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872930285] [2024-06-04 14:48:14,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872930285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:14,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:14,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:14,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146659435] [2024-06-04 14:48:14,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:15,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:15,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 571 transitions, 8926 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:15,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:15,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:15,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:17,864 INFO L124 PetriNetUnfolderBase]: 6294/9642 cut-off events. [2024-06-04 14:48:17,864 INFO L125 PetriNetUnfolderBase]: For 2534293/2534296 co-relation queries the response was YES. [2024-06-04 14:48:17,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102695 conditions, 9642 events. 6294/9642 cut-off events. For 2534293/2534296 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 57977 event pairs, 1617 based on Foata normal form. 4/9607 useless extension candidates. Maximal degree in co-relation 102503. Up to 9373 conditions per place. [2024-06-04 14:48:18,016 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 519 selfloop transitions, 36 changer transitions 0/585 dead transitions. [2024-06-04 14:48:18,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 585 transitions, 10138 flow [2024-06-04 14:48:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:48:18,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-04 14:48:18,017 INFO L175 Difference]: Start difference. First operand has 395 places, 571 transitions, 8926 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:48:18,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 585 transitions, 10138 flow [2024-06-04 14:48:24,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 585 transitions, 9803 flow, removed 100 selfloop flow, removed 5 redundant places. [2024-06-04 14:48:24,043 INFO L231 Difference]: Finished difference. Result has 398 places, 575 transitions, 8750 flow [2024-06-04 14:48:24,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8750, PETRI_PLACES=398, PETRI_TRANSITIONS=575} [2024-06-04 14:48:24,043 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-04 14:48:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 575 transitions, 8750 flow [2024-06-04 14:48:24,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:24,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:24,044 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 14:48:24,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:48:24,044 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:24,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:24,044 INFO L85 PathProgramCache]: Analyzing trace with hash -363397422, now seen corresponding path program 6 times [2024-06-04 14:48:24,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:24,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014305386] [2024-06-04 14:48:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:24,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:24,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014305386] [2024-06-04 14:48:24,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014305386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:24,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:24,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029653728] [2024-06-04 14:48:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:24,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:24,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:24,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 575 transitions, 8750 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:24,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:24,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:24,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:27,824 INFO L124 PetriNetUnfolderBase]: 6276/9618 cut-off events. [2024-06-04 14:48:27,824 INFO L125 PetriNetUnfolderBase]: For 2559656/2559659 co-relation queries the response was YES. [2024-06-04 14:48:27,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101387 conditions, 9618 events. 6276/9618 cut-off events. For 2559656/2559659 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 57815 event pairs, 1582 based on Foata normal form. 8/9587 useless extension candidates. Maximal degree in co-relation 101194. Up to 9142 conditions per place. [2024-06-04 14:48:27,989 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 496 selfloop transitions, 68 changer transitions 0/594 dead transitions. [2024-06-04 14:48:27,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 594 transitions, 10445 flow [2024-06-04 14:48:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:48:27,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-04 14:48:27,991 INFO L175 Difference]: Start difference. First operand has 398 places, 575 transitions, 8750 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:48:27,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 594 transitions, 10445 flow [2024-06-04 14:48:34,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 594 transitions, 10268 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 14:48:34,028 INFO L231 Difference]: Finished difference. Result has 399 places, 576 transitions, 8754 flow [2024-06-04 14:48:34,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8576, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8754, PETRI_PLACES=399, PETRI_TRANSITIONS=576} [2024-06-04 14:48:34,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 354 predicate places. [2024-06-04 14:48:34,028 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 576 transitions, 8754 flow [2024-06-04 14:48:34,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:34,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:34,029 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 14:48:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:48:34,029 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:34,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash -160177666, now seen corresponding path program 7 times [2024-06-04 14:48:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:34,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56401483] [2024-06-04 14:48:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:34,828 INFO 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 14:48:34,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:34,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56401483] [2024-06-04 14:48:34,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56401483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:34,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:34,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071327059] [2024-06-04 14:48:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:34,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:34,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 576 transitions, 8754 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:34,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:34,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:34,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:37,879 INFO L124 PetriNetUnfolderBase]: 6264/9603 cut-off events. [2024-06-04 14:48:37,880 INFO L125 PetriNetUnfolderBase]: For 2552259/2552262 co-relation queries the response was YES. [2024-06-04 14:48:37,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101032 conditions, 9603 events. 6264/9603 cut-off events. For 2552259/2552262 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 57750 event pairs, 1590 based on Foata normal form. 8/9572 useless extension candidates. Maximal degree in co-relation 100838. Up to 9271 conditions per place. [2024-06-04 14:48:38,047 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 522 selfloop transitions, 39 changer transitions 0/591 dead transitions. [2024-06-04 14:48:38,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 591 transitions, 10162 flow [2024-06-04 14:48:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:38,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-04 14:48:38,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-04 14:48:38,048 INFO L175 Difference]: Start difference. First operand has 399 places, 576 transitions, 8754 flow. Second operand 8 states and 140 transitions. [2024-06-04 14:48:38,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 591 transitions, 10162 flow [2024-06-04 14:48:44,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 591 transitions, 9854 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 14:48:44,294 INFO L231 Difference]: Finished difference. Result has 401 places, 576 transitions, 8534 flow [2024-06-04 14:48:44,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8534, PETRI_PLACES=401, PETRI_TRANSITIONS=576} [2024-06-04 14:48:44,294 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-04 14:48:44,295 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 576 transitions, 8534 flow [2024-06-04 14:48:44,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:44,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:44,295 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 14:48:44,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:48:44,295 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:44,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:44,296 INFO L85 PathProgramCache]: Analyzing trace with hash -145372531, now seen corresponding path program 1 times [2024-06-04 14:48:44,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:44,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080106076] [2024-06-04 14:48:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:44,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:45,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080106076] [2024-06-04 14:48:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080106076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:45,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:45,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:45,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070925762] [2024-06-04 14:48:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:45,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:45,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:45,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 576 transitions, 8534 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:45,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:45,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:45,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:48,251 INFO L124 PetriNetUnfolderBase]: 6258/9594 cut-off events. [2024-06-04 14:48:48,251 INFO L125 PetriNetUnfolderBase]: For 2553428/2553428 co-relation queries the response was YES. [2024-06-04 14:48:48,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100372 conditions, 9594 events. 6258/9594 cut-off events. For 2553428/2553428 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 57616 event pairs, 1588 based on Foata normal form. 2/9558 useless extension candidates. Maximal degree in co-relation 100178. Up to 9355 conditions per place. [2024-06-04 14:48:48,402 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 543 selfloop transitions, 18 changer transitions 0/591 dead transitions. [2024-06-04 14:48:48,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 591 transitions, 9776 flow [2024-06-04 14:48:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:48:48,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721590909090909 [2024-06-04 14:48:48,403 INFO L175 Difference]: Start difference. First operand has 401 places, 576 transitions, 8534 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:48:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 591 transitions, 9776 flow [2024-06-04 14:48:54,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 591 transitions, 9579 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-04 14:48:54,268 INFO L231 Difference]: Finished difference. Result has 401 places, 579 transitions, 8471 flow [2024-06-04 14:48:54,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8471, PETRI_PLACES=401, PETRI_TRANSITIONS=579} [2024-06-04 14:48:54,269 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-04 14:48:54,269 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 579 transitions, 8471 flow [2024-06-04 14:48:54,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:54,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:54,269 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 14:48:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:48:54,270 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:54,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash 784436564, now seen corresponding path program 8 times [2024-06-04 14:48:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590661722] [2024-06-04 14:48:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590661722] [2024-06-04 14:48:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590661722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:55,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:55,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:55,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940934080] [2024-06-04 14:48:55,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:55,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:55,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:48:55,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 579 transitions, 8471 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:55,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:55,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:48:55,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:58,042 INFO L124 PetriNetUnfolderBase]: 6352/9725 cut-off events. [2024-06-04 14:48:58,043 INFO L125 PetriNetUnfolderBase]: For 2644711/2644718 co-relation queries the response was YES. [2024-06-04 14:48:58,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101912 conditions, 9725 events. 6352/9725 cut-off events. For 2644711/2644718 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 58534 event pairs, 1445 based on Foata normal form. 10/9696 useless extension candidates. Maximal degree in co-relation 101718. Up to 8898 conditions per place. [2024-06-04 14:48:58,209 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 430 selfloop transitions, 209 changer transitions 0/669 dead transitions. [2024-06-04 14:48:58,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 669 transitions, 11195 flow [2024-06-04 14:48:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:48:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:48:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-04 14:48:58,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-04 14:48:58,211 INFO L175 Difference]: Start difference. First operand has 401 places, 579 transitions, 8471 flow. Second operand 9 states and 177 transitions. [2024-06-04 14:48:58,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 669 transitions, 11195 flow [2024-06-04 14:49:04,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 669 transitions, 11077 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:04,847 INFO L231 Difference]: Finished difference. Result has 406 places, 637 transitions, 9941 flow [2024-06-04 14:49:04,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8353, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9941, PETRI_PLACES=406, PETRI_TRANSITIONS=637} [2024-06-04 14:49:04,847 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-04 14:49:04,847 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 637 transitions, 9941 flow [2024-06-04 14:49:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:04,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:04,848 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 14:49:04,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:49:04,848 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:04,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:04,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1749987601, now seen corresponding path program 7 times [2024-06-04 14:49:04,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:04,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386384992] [2024-06-04 14:49:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:04,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386384992] [2024-06-04 14:49:05,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386384992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:05,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:49:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300035135] [2024-06-04 14:49:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:49:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:49:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:49:05,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:05,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 637 transitions, 9941 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:05,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:05,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:05,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:08,552 INFO L124 PetriNetUnfolderBase]: 6338/9707 cut-off events. [2024-06-04 14:49:08,552 INFO L125 PetriNetUnfolderBase]: For 2644495/2644498 co-relation queries the response was YES. [2024-06-04 14:49:08,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103939 conditions, 9707 events. 6338/9707 cut-off events. For 2644495/2644498 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58368 event pairs, 1470 based on Foata normal form. 4/9672 useless extension candidates. Maximal degree in co-relation 103742. Up to 9154 conditions per place. [2024-06-04 14:49:08,713 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 503 selfloop transitions, 122 changer transitions 0/655 dead transitions. [2024-06-04 14:49:08,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 655 transitions, 11251 flow [2024-06-04 14:49:08,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:49:08,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-04 14:49:08,715 INFO L175 Difference]: Start difference. First operand has 406 places, 637 transitions, 9941 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:49:08,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 655 transitions, 11251 flow [2024-06-04 14:49:15,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 655 transitions, 11110 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:15,511 INFO L231 Difference]: Finished difference. Result has 411 places, 637 transitions, 10063 flow [2024-06-04 14:49:15,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9800, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10063, PETRI_PLACES=411, PETRI_TRANSITIONS=637} [2024-06-04 14:49:15,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-04 14:49:15,512 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 637 transitions, 10063 flow [2024-06-04 14:49:15,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:15,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:15,513 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 14:49:15,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:49:15,513 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:15,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash 435989664, now seen corresponding path program 9 times [2024-06-04 14:49:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:15,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600839503] [2024-06-04 14:49:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:15,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:16,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:16,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600839503] [2024-06-04 14:49:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600839503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:16,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:16,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829338157] [2024-06-04 14:49:16,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:16,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:16,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:16,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 637 transitions, 10063 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:16,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:16,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:16,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:19,585 INFO L124 PetriNetUnfolderBase]: 6351/9724 cut-off events. [2024-06-04 14:49:19,586 INFO L125 PetriNetUnfolderBase]: For 2687967/2687974 co-relation queries the response was YES. [2024-06-04 14:49:19,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103974 conditions, 9724 events. 6351/9724 cut-off events. For 2687967/2687974 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 58492 event pairs, 1501 based on Foata normal form. 10/9695 useless extension candidates. Maximal degree in co-relation 103775. Up to 8668 conditions per place. [2024-06-04 14:49:19,734 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 431 selfloop transitions, 220 changer transitions 0/681 dead transitions. [2024-06-04 14:49:19,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 681 transitions, 12394 flow [2024-06-04 14:49:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-04 14:49:19,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-04 14:49:19,735 INFO L175 Difference]: Start difference. First operand has 411 places, 637 transitions, 10063 flow. Second operand 9 states and 181 transitions. [2024-06-04 14:49:19,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 681 transitions, 12394 flow [2024-06-04 14:49:26,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 681 transitions, 12097 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:26,432 INFO L231 Difference]: Finished difference. Result has 413 places, 645 transitions, 10366 flow [2024-06-04 14:49:26,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9766, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10366, PETRI_PLACES=413, PETRI_TRANSITIONS=645} [2024-06-04 14:49:26,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-04 14:49:26,433 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 645 transitions, 10366 flow [2024-06-04 14:49:26,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:26,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:26,433 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 14:49:26,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:49:26,433 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:26,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1749991569, now seen corresponding path program 5 times [2024-06-04 14:49:26,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:26,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839520] [2024-06-04 14:49:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:26,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:27,391 INFO 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 14:49:27,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:27,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839520] [2024-06-04 14:49:27,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:27,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:27,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589459511] [2024-06-04 14:49:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:27,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:27,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:27,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:27,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 645 transitions, 10366 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:27,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:27,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:27,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:30,617 INFO L124 PetriNetUnfolderBase]: 6355/9732 cut-off events. [2024-06-04 14:49:30,617 INFO L125 PetriNetUnfolderBase]: For 2684389/2684392 co-relation queries the response was YES. [2024-06-04 14:49:30,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104647 conditions, 9732 events. 6355/9732 cut-off events. For 2684389/2684392 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 58547 event pairs, 1468 based on Foata normal form. 4/9697 useless extension candidates. Maximal degree in co-relation 104447. Up to 9167 conditions per place. [2024-06-04 14:49:30,809 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 510 selfloop transitions, 128 changer transitions 0/668 dead transitions. [2024-06-04 14:49:30,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 668 transitions, 11728 flow [2024-06-04 14:49:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:49:30,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-04 14:49:30,811 INFO L175 Difference]: Start difference. First operand has 413 places, 645 transitions, 10366 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:49:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 668 transitions, 11728 flow [2024-06-04 14:49:37,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 668 transitions, 11291 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:37,720 INFO L231 Difference]: Finished difference. Result has 416 places, 649 transitions, 10229 flow [2024-06-04 14:49:37,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9929, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10229, PETRI_PLACES=416, PETRI_TRANSITIONS=649} [2024-06-04 14:49:37,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-04 14:49:37,721 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 649 transitions, 10229 flow [2024-06-04 14:49:37,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:37,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:37,722 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 14:49:37,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:49:37,724 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:37,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:37,724 INFO L85 PathProgramCache]: Analyzing trace with hash 971130620, now seen corresponding path program 10 times [2024-06-04 14:49:37,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:37,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825194751] [2024-06-04 14:49:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:37,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:38,515 INFO 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 14:49:38,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:38,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825194751] [2024-06-04 14:49:38,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825194751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:38,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:38,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:38,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134398029] [2024-06-04 14:49:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:38,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:38,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:38,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:49:38,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 649 transitions, 10229 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:38,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:38,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:49:38,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand