./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053.opt.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/mix053.opt.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/mix053.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix053.opt.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 [2024-06-03 19:53:43,615 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:53:43,716 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:53:43,722 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:53:43,723 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:53:43,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:53:43,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:53:43,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:53:43,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:53:43,764 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:53:43,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:53:43,765 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:53:43,766 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:53:43,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:53:43,767 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:53:43,768 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:53:43,768 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:53:43,768 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:53:43,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:53:43,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:53:43,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:53:43,770 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:53:43,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:53:43,770 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:53:43,770 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:53:43,771 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:53:43,771 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:53:43,771 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:53:43,772 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:53:43,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:53:43,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:53:43,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:53:43,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:53:43,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:53:43,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:53:43,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:53:43,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:53:43,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:53:43,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:53:43,776 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:53:43,776 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:53:43,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:53:43,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:53:43,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:53:44,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:53:44,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:53:44,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:53:44,060 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:53:44,061 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:53:44,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053.opt.i [2024-06-03 19:53:45,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:53:45,553 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:53:45,554 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053.opt.i [2024-06-03 19:53:45,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b98dd9d45/d2ef6e30323c485399f302dc4b4fac67/FLAG94a07febf [2024-06-03 19:53:45,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b98dd9d45/d2ef6e30323c485399f302dc4b4fac67 [2024-06-03 19:53:45,589 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:53:45,590 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:53:45,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix053.opt.yml/witness.yml [2024-06-03 19:53:45,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:53:45,814 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:53:45,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:53:45,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:53:45,821 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:53:45,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:53:45" (1/2) ... [2024-06-03 19:53:45,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43eb3eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:45, skipping insertion in model container [2024-06-03 19:53:45,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:53:45" (1/2) ... [2024-06-03 19:53:45,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f6b0c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:53:45, skipping insertion in model container [2024-06-03 19:53:45,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:53:45" (2/2) ... [2024-06-03 19:53:45,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43eb3eca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:45, skipping insertion in model container [2024-06-03 19:53:45,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:53:45" (2/2) ... [2024-06-03 19:53:45,827 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:53:45,941 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:53:45,943 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-03 19:53:45,943 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-03 19:53:45,944 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-03 19:53:45,944 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || z$flush_delayed == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0) [2024-06-03 19:53:45,944 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:53:45,945 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-03 19:53:45,992 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:53:46,348 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:53:46,363 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:53:46,517 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:53:46,559 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:53:46,560 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46 WrapperNode [2024-06-03 19:53:46,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:53:46,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:53:46,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:53:46,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:53:46,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,647 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-03 19:53:46,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:53:46,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:53:46,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:53:46,649 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:53:46,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,705 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]. [2024-06-03 19:53:46,705 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,705 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,717 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,719 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,721 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,723 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:53:46,728 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:53:46,728 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:53:46,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:53:46,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (1/1) ... [2024-06-03 19:53:46,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:53:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:53:46,757 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) [2024-06-03 19:53:46,771 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 [2024-06-03 19:53:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:53:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:53:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:53:46,800 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:53:46,801 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:53:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:53:46,801 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:53:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:53:46,801 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:53:46,801 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:53:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:53:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:53:46,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:53:46,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:53:46,803 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:53:46,940 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:53:46,942 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:53:47,403 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:53:47,403 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:53:47,601 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:53:47,602 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:53:47,602 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:53:47 BoogieIcfgContainer [2024-06-03 19:53:47,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:53:47,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:53:47,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:53:47,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:53:47,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:53:45" (1/4) ... [2024-06-03 19:53:47,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cc9f96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:53:47, skipping insertion in model container [2024-06-03 19:53:47,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:53:45" (2/4) ... [2024-06-03 19:53:47,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cc9f96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:53:47, skipping insertion in model container [2024-06-03 19:53:47,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:53:46" (3/4) ... [2024-06-03 19:53:47,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cc9f96 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:53:47, skipping insertion in model container [2024-06-03 19:53:47,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:53:47" (4/4) ... [2024-06-03 19:53:47,612 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053.opt.i [2024-06-03 19:53:47,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:53:47,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:53:47,628 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:53:47,686 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:53:47,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 19:53:47,758 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-03 19:53:47,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:53:47,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:53:47,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-03 19:53:47,765 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-03 19:53:47,779 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:53:47,785 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;@cd2b1ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:53:47,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:53:47,791 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:53:47,791 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:53:47,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:53:47,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:47,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:53:47,792 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:47,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1366336336, now seen corresponding path program 1 times [2024-06-03 19:53:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:47,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71034200] [2024-06-03 19:53:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:49,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:49,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71034200] [2024-06-03 19:53:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71034200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:49,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:53:49,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111772899] [2024-06-03 19:53:49,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:49,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:53:49,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:53:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:53:49,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-03 19:53:49,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:49,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:49,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-03 19:53:49,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:50,656 INFO L124 PetriNetUnfolderBase]: 6742/9616 cut-off events. [2024-06-03 19:53:50,656 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-06-03 19:53:50,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19170 conditions, 9616 events. 6742/9616 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 53132 event pairs, 5078 based on Foata normal form. 1/9383 useless extension candidates. Maximal degree in co-relation 19154. Up to 9223 conditions per place. [2024-06-03 19:53:50,735 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 43 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-03 19:53:50,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 229 flow [2024-06-03 19:53:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:53:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:53:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-03 19:53:50,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-03 19:53:50,751 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 97 transitions. [2024-06-03 19:53:50,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 229 flow [2024-06-03 19:53:50,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:53:50,757 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-03 19:53:50,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-03 19:53:50,762 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-03 19:53:50,763 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-03 19:53:50,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:50,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:50,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:50,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:53:50,764 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:50,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1210808143, now seen corresponding path program 1 times [2024-06-03 19:53:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:50,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319263064] [2024-06-03 19:53:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:51,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:51,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319263064] [2024-06-03 19:53:51,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319263064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:51,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:51,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:53:51,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120551147] [2024-06-03 19:53:51,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:51,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:53:51,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:51,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:53:51,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:53:51,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:51,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:51,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:51,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:51,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:53,152 INFO L124 PetriNetUnfolderBase]: 7882/10927 cut-off events. [2024-06-03 19:53:53,153 INFO L125 PetriNetUnfolderBase]: For 2113/2113 co-relation queries the response was YES. [2024-06-03 19:53:53,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24967 conditions, 10927 events. 7882/10927 cut-off events. For 2113/2113 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 58252 event pairs, 5323 based on Foata normal form. 4/10900 useless extension candidates. Maximal degree in co-relation 24952. Up to 10713 conditions per place. [2024-06-03 19:53:53,245 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-03 19:53:53,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 323 flow [2024-06-03 19:53:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:53:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:53:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-03 19:53:53,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-03 19:53:53,251 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-03 19:53:53,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 323 flow [2024-06-03 19:53:53,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:53:53,260 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-03 19:53:53,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-03 19:53:53,261 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-03 19:53:53,262 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-03 19:53:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:53,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:53,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:53,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:53:53,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:53,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1119652093, now seen corresponding path program 1 times [2024-06-03 19:53:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:53,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588605941] [2024-06-03 19:53:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:54,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:54,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588605941] [2024-06-03 19:53:54,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588605941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:54,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:54,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:53:54,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087245932] [2024-06-03 19:53:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:54,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:53:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:53:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:53:54,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:54,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:54,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:54,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:54,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:55,766 INFO L124 PetriNetUnfolderBase]: 7900/10993 cut-off events. [2024-06-03 19:53:55,766 INFO L125 PetriNetUnfolderBase]: For 6172/6172 co-relation queries the response was YES. [2024-06-03 19:53:55,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28025 conditions, 10993 events. 7900/10993 cut-off events. For 6172/6172 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59254 event pairs, 4145 based on Foata normal form. 7/10983 useless extension candidates. Maximal degree in co-relation 28008. Up to 10634 conditions per place. [2024-06-03 19:53:55,827 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-03 19:53:55,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 539 flow [2024-06-03 19:53:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:53:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:53:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-03 19:53:55,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-03 19:53:55,833 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 161 transitions. [2024-06-03 19:53:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 539 flow [2024-06-03 19:53:55,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:53:55,840 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-03 19:53:55,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-03 19:53:55,842 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-03 19:53:55,842 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-03 19:53:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:53:55,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:55,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:55,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:53:55,843 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:55,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1390277218, now seen corresponding path program 1 times [2024-06-03 19:53:55,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283265317] [2024-06-03 19:53:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:56,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:56,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283265317] [2024-06-03 19:53:56,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283265317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:56,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:56,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:53:56,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131190349] [2024-06-03 19:53:56,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:56,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:53:56,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:53:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:53:56,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:56,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-03 19:53:56,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:56,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:56,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:53:58,254 INFO L124 PetriNetUnfolderBase]: 7929/11037 cut-off events. [2024-06-03 19:53:58,254 INFO L125 PetriNetUnfolderBase]: For 14689/14694 co-relation queries the response was YES. [2024-06-03 19:53:58,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32945 conditions, 11037 events. 7929/11037 cut-off events. For 14689/14694 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 59544 event pairs, 3337 based on Foata normal form. 18/11038 useless extension candidates. Maximal degree in co-relation 32925. Up to 10599 conditions per place. [2024-06-03 19:53:58,330 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 79 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-03 19:53:58,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 684 flow [2024-06-03 19:53:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:53:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:53:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-03 19:53:58,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-03 19:53:58,334 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 186 transitions. [2024-06-03 19:53:58,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 684 flow [2024-06-03 19:53:58,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 672 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:53:58,345 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 387 flow [2024-06-03 19:53:58,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-03 19:53:58,347 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-03 19:53:58,347 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 387 flow [2024-06-03 19:53:58,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-03 19:53:58,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:53:58,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:53:58,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:53:58,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:53:58,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:53:58,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1445460453, now seen corresponding path program 1 times [2024-06-03 19:53:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:53:58,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146697473] [2024-06-03 19:53:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:53:58,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:53:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:53:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:53:59,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:53:59,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146697473] [2024-06-03 19:53:59,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146697473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:53:59,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:53:59,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:53:59,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141461393] [2024-06-03 19:53:59,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:53:59,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:53:59,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:53:59,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:53:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:53:59,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:53:59,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-03 19:53:59,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:53:59,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:53:59,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:00,400 INFO L124 PetriNetUnfolderBase]: 6770/9679 cut-off events. [2024-06-03 19:54:00,400 INFO L125 PetriNetUnfolderBase]: For 18698/18698 co-relation queries the response was YES. [2024-06-03 19:54:00,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31446 conditions, 9679 events. 6770/9679 cut-off events. For 18698/18698 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 54034 event pairs, 3368 based on Foata normal form. 3/9622 useless extension candidates. Maximal degree in co-relation 31423. Up to 9250 conditions per place. [2024-06-03 19:54:00,466 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 66 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-03 19:54:00,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 583 flow [2024-06-03 19:54:00,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:54:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:54:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 19:54:00,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-06-03 19:54:00,468 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 387 flow. Second operand 5 states and 131 transitions. [2024-06-03 19:54:00,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 583 flow [2024-06-03 19:54:00,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 514 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:00,479 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 349 flow [2024-06-03 19:54:00,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-03 19:54:00,480 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-03 19:54:00,480 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 349 flow [2024-06-03 19:54:00,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-03 19:54:00,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:00,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:00,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:54:00,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:00,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:00,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1853115237, now seen corresponding path program 1 times [2024-06-03 19:54:00,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747089793] [2024-06-03 19:54:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:00,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:01,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747089793] [2024-06-03 19:54:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747089793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:01,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:01,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:01,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596854881] [2024-06-03 19:54:01,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:01,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:01,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:01,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:54:01,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:01,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:01,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:54:01,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:02,812 INFO L124 PetriNetUnfolderBase]: 6803/9901 cut-off events. [2024-06-03 19:54:02,812 INFO L125 PetriNetUnfolderBase]: For 21782/21782 co-relation queries the response was YES. [2024-06-03 19:54:02,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32156 conditions, 9901 events. 6803/9901 cut-off events. For 21782/21782 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 55996 event pairs, 3202 based on Foata normal form. 7/9899 useless extension candidates. Maximal degree in co-relation 32131. Up to 9164 conditions per place. [2024-06-03 19:54:02,880 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-03 19:54:02,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 757 flow [2024-06-03 19:54:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-03 19:54:02,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-03 19:54:02,882 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 349 flow. Second operand 6 states and 167 transitions. [2024-06-03 19:54:02,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 757 flow [2024-06-03 19:54:02,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 728 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:02,897 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 494 flow [2024-06-03 19:54:02,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2024-06-03 19:54:02,900 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-03 19:54:02,900 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 494 flow [2024-06-03 19:54:02,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:02,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:02,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:02,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:54:02,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:02,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:02,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1606276578, now seen corresponding path program 1 times [2024-06-03 19:54:02,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123807994] [2024-06-03 19:54:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:03,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123807994] [2024-06-03 19:54:03,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123807994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:03,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:03,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:03,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618011499] [2024-06-03 19:54:03,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:03,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:03,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:03,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 494 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:03,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:03,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:03,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:05,164 INFO L124 PetriNetUnfolderBase]: 7966/11092 cut-off events. [2024-06-03 19:54:05,164 INFO L125 PetriNetUnfolderBase]: For 39138/39148 co-relation queries the response was YES. [2024-06-03 19:54:05,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41357 conditions, 11092 events. 7966/11092 cut-off events. For 39138/39148 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 59329 event pairs, 3875 based on Foata normal form. 14/11095 useless extension candidates. Maximal degree in co-relation 41330. Up to 10721 conditions per place. [2024-06-03 19:54:05,247 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-03 19:54:05,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 853 flow [2024-06-03 19:54:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:54:05,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-03 19:54:05,249 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 494 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:54:05,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 853 flow [2024-06-03 19:54:05,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 829 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-03 19:54:05,279 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 566 flow [2024-06-03 19:54:05,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=566, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-03 19:54:05,280 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-03 19:54:05,280 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 566 flow [2024-06-03 19:54:05,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:05,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:05,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:54:05,281 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:05,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1813079748, now seen corresponding path program 2 times [2024-06-03 19:54:05,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:05,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491259927] [2024-06-03 19:54:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:05,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:06,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:06,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491259927] [2024-06-03 19:54:06,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491259927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:06,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:06,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:06,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648402966] [2024-06-03 19:54:06,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:06,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:06,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:06,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 566 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:06,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:06,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:07,532 INFO L124 PetriNetUnfolderBase]: 7942/11044 cut-off events. [2024-06-03 19:54:07,532 INFO L125 PetriNetUnfolderBase]: For 43574/43574 co-relation queries the response was YES. [2024-06-03 19:54:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41700 conditions, 11044 events. 7942/11044 cut-off events. For 43574/43574 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 58912 event pairs, 3895 based on Foata normal form. 3/11033 useless extension candidates. Maximal degree in co-relation 41670. Up to 10691 conditions per place. [2024-06-03 19:54:07,625 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 76 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-03 19:54:07,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 832 flow [2024-06-03 19:54:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 19:54:07,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:54:07,629 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 566 flow. Second operand 6 states and 156 transitions. [2024-06-03 19:54:07,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 832 flow [2024-06-03 19:54:07,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 789 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:07,670 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 586 flow [2024-06-03 19:54:07,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-03 19:54:07,674 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-03 19:54:07,674 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 586 flow [2024-06-03 19:54:07,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:07,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:07,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:07,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:54:07,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:07,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:07,676 INFO L85 PathProgramCache]: Analyzing trace with hash 120797286, now seen corresponding path program 1 times [2024-06-03 19:54:07,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:07,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993986083] [2024-06-03 19:54:07,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:07,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993986083] [2024-06-03 19:54:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993986083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58669923] [2024-06-03 19:54:08,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:08,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:08,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:08,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 586 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:08,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:08,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:08,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:10,303 INFO L124 PetriNetUnfolderBase]: 8752/12218 cut-off events. [2024-06-03 19:54:10,303 INFO L125 PetriNetUnfolderBase]: For 56135/56135 co-relation queries the response was YES. [2024-06-03 19:54:10,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47343 conditions, 12218 events. 8752/12218 cut-off events. For 56135/56135 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65844 event pairs, 3183 based on Foata normal form. 14/12216 useless extension candidates. Maximal degree in co-relation 47312. Up to 10613 conditions per place. [2024-06-03 19:54:10,373 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 127 selfloop transitions, 59 changer transitions 0/193 dead transitions. [2024-06-03 19:54:10,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 193 transitions, 1682 flow [2024-06-03 19:54:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:10,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-03 19:54:10,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 19:54:10,382 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 586 flow. Second operand 8 states and 234 transitions. [2024-06-03 19:54:10,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 193 transitions, 1682 flow [2024-06-03 19:54:10,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 193 transitions, 1519 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:10,415 INFO L231 Difference]: Finished difference. Result has 85 places, 121 transitions, 937 flow [2024-06-03 19:54:10,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=85, PETRI_TRANSITIONS=121} [2024-06-03 19:54:10,416 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-03 19:54:10,416 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 121 transitions, 937 flow [2024-06-03 19:54:10,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:10,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:10,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:10,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:54:10,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:10,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1745032730, now seen corresponding path program 2 times [2024-06-03 19:54:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:10,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580579162] [2024-06-03 19:54:10,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:10,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:11,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580579162] [2024-06-03 19:54:11,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580579162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:11,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:11,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951032445] [2024-06-03 19:54:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:11,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:11,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:11,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 121 transitions, 937 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:11,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:11,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:11,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:13,397 INFO L124 PetriNetUnfolderBase]: 9368/13182 cut-off events. [2024-06-03 19:54:13,397 INFO L125 PetriNetUnfolderBase]: For 83930/83936 co-relation queries the response was YES. [2024-06-03 19:54:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58877 conditions, 13182 events. 9368/13182 cut-off events. For 83930/83936 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 72735 event pairs, 3466 based on Foata normal form. 30/13196 useless extension candidates. Maximal degree in co-relation 58842. Up to 11015 conditions per place. [2024-06-03 19:54:13,488 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 105 selfloop transitions, 81 changer transitions 0/193 dead transitions. [2024-06-03 19:54:13,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 193 transitions, 1821 flow [2024-06-03 19:54:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-03 19:54:13,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521978021978022 [2024-06-03 19:54:13,491 INFO L175 Difference]: Start difference. First operand has 85 places, 121 transitions, 937 flow. Second operand 7 states and 201 transitions. [2024-06-03 19:54:13,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 193 transitions, 1821 flow [2024-06-03 19:54:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 193 transitions, 1727 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-03 19:54:13,571 INFO L231 Difference]: Finished difference. Result has 92 places, 142 transitions, 1310 flow [2024-06-03 19:54:13,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1310, PETRI_PLACES=92, PETRI_TRANSITIONS=142} [2024-06-03 19:54:13,572 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 37 predicate places. [2024-06-03 19:54:13,572 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 142 transitions, 1310 flow [2024-06-03 19:54:13,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:13,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:13,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:13,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:54:13,573 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:13,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 371135394, now seen corresponding path program 3 times [2024-06-03 19:54:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:13,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056615545] [2024-06-03 19:54:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:14,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:14,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056615545] [2024-06-03 19:54:14,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056615545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:14,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:14,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:14,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627510142] [2024-06-03 19:54:14,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:14,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:14,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:14,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:14,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:14,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:14,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 142 transitions, 1310 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:14,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:14,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:14,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:16,587 INFO L124 PetriNetUnfolderBase]: 9562/13472 cut-off events. [2024-06-03 19:54:16,587 INFO L125 PetriNetUnfolderBase]: For 111278/111296 co-relation queries the response was YES. [2024-06-03 19:54:16,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66387 conditions, 13472 events. 9562/13472 cut-off events. For 111278/111296 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 74374 event pairs, 3461 based on Foata normal form. 21/13469 useless extension candidates. Maximal degree in co-relation 66348. Up to 11127 conditions per place. [2024-06-03 19:54:16,698 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 102 selfloop transitions, 108 changer transitions 0/217 dead transitions. [2024-06-03 19:54:16,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 217 transitions, 2364 flow [2024-06-03 19:54:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-03 19:54:16,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-03 19:54:16,700 INFO L175 Difference]: Start difference. First operand has 92 places, 142 transitions, 1310 flow. Second operand 7 states and 200 transitions. [2024-06-03 19:54:16,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 217 transitions, 2364 flow [2024-06-03 19:54:16,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 217 transitions, 2231 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:16,829 INFO L231 Difference]: Finished difference. Result has 98 places, 167 transitions, 1804 flow [2024-06-03 19:54:16,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=98, PETRI_TRANSITIONS=167} [2024-06-03 19:54:16,830 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-03 19:54:16,830 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 167 transitions, 1804 flow [2024-06-03 19:54:16,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:16,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:16,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:16,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:54:16,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:16,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1567901210, now seen corresponding path program 4 times [2024-06-03 19:54:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:16,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497955744] [2024-06-03 19:54:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:17,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497955744] [2024-06-03 19:54:17,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497955744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:17,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:17,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304416113] [2024-06-03 19:54:17,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:17,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:17,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 167 transitions, 1804 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:17,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:17,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:17,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:19,521 INFO L124 PetriNetUnfolderBase]: 9538/13431 cut-off events. [2024-06-03 19:54:19,521 INFO L125 PetriNetUnfolderBase]: For 139590/139602 co-relation queries the response was YES. [2024-06-03 19:54:19,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70794 conditions, 13431 events. 9538/13431 cut-off events. For 139590/139602 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 74257 event pairs, 3532 based on Foata normal form. 17/13423 useless extension candidates. Maximal degree in co-relation 70752. Up to 11120 conditions per place. [2024-06-03 19:54:19,626 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 108 selfloop transitions, 100 changer transitions 0/215 dead transitions. [2024-06-03 19:54:19,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 215 transitions, 2556 flow [2024-06-03 19:54:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-03 19:54:19,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439560439560439 [2024-06-03 19:54:19,628 INFO L175 Difference]: Start difference. First operand has 98 places, 167 transitions, 1804 flow. Second operand 7 states and 198 transitions. [2024-06-03 19:54:19,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 215 transitions, 2556 flow [2024-06-03 19:54:19,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 215 transitions, 2462 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-06-03 19:54:19,814 INFO L231 Difference]: Finished difference. Result has 104 places, 167 transitions, 1930 flow [2024-06-03 19:54:19,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1930, PETRI_PLACES=104, PETRI_TRANSITIONS=167} [2024-06-03 19:54:19,815 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 49 predicate places. [2024-06-03 19:54:19,815 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 167 transitions, 1930 flow [2024-06-03 19:54:19,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:19,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:19,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:19,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:54:19,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:19,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash 149499282, now seen corresponding path program 1 times [2024-06-03 19:54:19,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:19,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5448179] [2024-06-03 19:54:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5448179] [2024-06-03 19:54:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5448179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:20,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:20,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934889855] [2024-06-03 19:54:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:20,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:54:20,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 167 transitions, 1930 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-03 19:54:20,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:20,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:54:20,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:22,475 INFO L124 PetriNetUnfolderBase]: 8534/12463 cut-off events. [2024-06-03 19:54:22,475 INFO L125 PetriNetUnfolderBase]: For 127205/127207 co-relation queries the response was YES. [2024-06-03 19:54:22,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64930 conditions, 12463 events. 8534/12463 cut-off events. For 127205/127207 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 72049 event pairs, 3099 based on Foata normal form. 26/12480 useless extension candidates. Maximal degree in co-relation 64885. Up to 11286 conditions per place. [2024-06-03 19:54:22,590 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 180 selfloop transitions, 25 changer transitions 0/213 dead transitions. [2024-06-03 19:54:22,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 213 transitions, 2606 flow [2024-06-03 19:54:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-03 19:54:22,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-03 19:54:22,592 INFO L175 Difference]: Start difference. First operand has 104 places, 167 transitions, 1930 flow. Second operand 7 states and 196 transitions. [2024-06-03 19:54:22,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 213 transitions, 2606 flow [2024-06-03 19:54:22,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 213 transitions, 2375 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:22,730 INFO L231 Difference]: Finished difference. Result has 105 places, 170 transitions, 1806 flow [2024-06-03 19:54:22,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1806, PETRI_PLACES=105, PETRI_TRANSITIONS=170} [2024-06-03 19:54:22,731 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-03 19:54:22,731 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 170 transitions, 1806 flow [2024-06-03 19:54:22,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-03 19:54:22,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:22,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:22,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:54:22,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:22,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1951717789, now seen corresponding path program 1 times [2024-06-03 19:54:22,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:22,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582301694] [2024-06-03 19:54:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:22,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:23,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582301694] [2024-06-03 19:54:23,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582301694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:23,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:23,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:54:23,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552503388] [2024-06-03 19:54:23,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:23,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:54:23,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:23,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:54:23,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:54:23,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:54:23,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 170 transitions, 1806 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-03 19:54:23,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:23,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:54:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:25,016 INFO L124 PetriNetUnfolderBase]: 8520/12447 cut-off events. [2024-06-03 19:54:25,016 INFO L125 PetriNetUnfolderBase]: For 131449/131451 co-relation queries the response was YES. [2024-06-03 19:54:25,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64928 conditions, 12447 events. 8520/12447 cut-off events. For 131449/131451 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 72010 event pairs, 3221 based on Foata normal form. 4/12450 useless extension candidates. Maximal degree in co-relation 64883. Up to 11577 conditions per place. [2024-06-03 19:54:25,118 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 167 selfloop transitions, 10 changer transitions 0/185 dead transitions. [2024-06-03 19:54:25,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 185 transitions, 2206 flow [2024-06-03 19:54:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:54:25,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:54:25,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 19:54:25,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-03 19:54:25,119 INFO L175 Difference]: Start difference. First operand has 105 places, 170 transitions, 1806 flow. Second operand 5 states and 128 transitions. [2024-06-03 19:54:25,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 185 transitions, 2206 flow [2024-06-03 19:54:25,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 185 transitions, 2123 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:54:25,254 INFO L231 Difference]: Finished difference. Result has 105 places, 170 transitions, 1752 flow [2024-06-03 19:54:25,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1752, PETRI_PLACES=105, PETRI_TRANSITIONS=170} [2024-06-03 19:54:25,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-03 19:54:25,255 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 170 transitions, 1752 flow [2024-06-03 19:54:25,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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) [2024-06-03 19:54:25,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:25,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:25,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:54:25,256 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:25,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1738560936, now seen corresponding path program 1 times [2024-06-03 19:54:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:25,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681531735] [2024-06-03 19:54:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:25,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:26,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:26,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681531735] [2024-06-03 19:54:26,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681531735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:26,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:26,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:26,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764978976] [2024-06-03 19:54:26,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:26,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:26,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:26,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 170 transitions, 1752 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:26,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:26,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:26,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:28,067 INFO L124 PetriNetUnfolderBase]: 9946/14100 cut-off events. [2024-06-03 19:54:28,068 INFO L125 PetriNetUnfolderBase]: For 169175/169199 co-relation queries the response was YES. [2024-06-03 19:54:28,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74743 conditions, 14100 events. 9946/14100 cut-off events. For 169175/169199 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 79301 event pairs, 3524 based on Foata normal form. 36/14123 useless extension candidates. Maximal degree in co-relation 74697. Up to 11570 conditions per place. [2024-06-03 19:54:28,192 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 119 selfloop transitions, 113 changer transitions 0/239 dead transitions. [2024-06-03 19:54:28,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 239 transitions, 2848 flow [2024-06-03 19:54:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-03 19:54:28,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-03 19:54:28,195 INFO L175 Difference]: Start difference. First operand has 105 places, 170 transitions, 1752 flow. Second operand 7 states and 200 transitions. [2024-06-03 19:54:28,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 239 transitions, 2848 flow [2024-06-03 19:54:28,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 239 transitions, 2815 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:28,359 INFO L231 Difference]: Finished difference. Result has 110 places, 189 transitions, 2312 flow [2024-06-03 19:54:28,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2312, PETRI_PLACES=110, PETRI_TRANSITIONS=189} [2024-06-03 19:54:28,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-03 19:54:28,360 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 189 transitions, 2312 flow [2024-06-03 19:54:28,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:28,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:28,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:54:28,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:28,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1738555356, now seen corresponding path program 2 times [2024-06-03 19:54:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277775750] [2024-06-03 19:54:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:29,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:29,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277775750] [2024-06-03 19:54:29,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277775750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:29,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:29,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:29,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683002178] [2024-06-03 19:54:29,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:29,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:29,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:29,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:29,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 189 transitions, 2312 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:29,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:29,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:29,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:31,259 INFO L124 PetriNetUnfolderBase]: 9920/14063 cut-off events. [2024-06-03 19:54:31,259 INFO L125 PetriNetUnfolderBase]: For 200534/200550 co-relation queries the response was YES. [2024-06-03 19:54:31,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80384 conditions, 14063 events. 9920/14063 cut-off events. For 200534/200550 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 79004 event pairs, 3598 based on Foata normal form. 30/14080 useless extension candidates. Maximal degree in co-relation 80336. Up to 11556 conditions per place. [2024-06-03 19:54:31,385 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 120 selfloop transitions, 120 changer transitions 0/247 dead transitions. [2024-06-03 19:54:31,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 247 transitions, 3292 flow [2024-06-03 19:54:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-03 19:54:31,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2024-06-03 19:54:31,387 INFO L175 Difference]: Start difference. First operand has 110 places, 189 transitions, 2312 flow. Second operand 7 states and 203 transitions. [2024-06-03 19:54:31,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 247 transitions, 3292 flow [2024-06-03 19:54:31,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 247 transitions, 3105 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:31,720 INFO L231 Difference]: Finished difference. Result has 115 places, 195 transitions, 2529 flow [2024-06-03 19:54:31,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2529, PETRI_PLACES=115, PETRI_TRANSITIONS=195} [2024-06-03 19:54:31,720 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-03 19:54:31,720 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 195 transitions, 2529 flow [2024-06-03 19:54:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:31,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:31,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:54:31,721 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:31,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:31,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2070040718, now seen corresponding path program 3 times [2024-06-03 19:54:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165116001] [2024-06-03 19:54:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:32,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165116001] [2024-06-03 19:54:32,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165116001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:32,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:32,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:32,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433219110] [2024-06-03 19:54:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:32,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:32,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:32,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:32,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 195 transitions, 2529 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:32,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:32,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:32,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:34,589 INFO L124 PetriNetUnfolderBase]: 9966/14122 cut-off events. [2024-06-03 19:54:34,590 INFO L125 PetriNetUnfolderBase]: For 225501/225599 co-relation queries the response was YES. [2024-06-03 19:54:34,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82503 conditions, 14122 events. 9966/14122 cut-off events. For 225501/225599 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 79507 event pairs, 3516 based on Foata normal form. 71/14135 useless extension candidates. Maximal degree in co-relation 82453. Up to 11604 conditions per place. [2024-06-03 19:54:34,728 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 114 selfloop transitions, 124 changer transitions 0/245 dead transitions. [2024-06-03 19:54:34,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 245 transitions, 3365 flow [2024-06-03 19:54:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-03 19:54:34,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-03 19:54:34,730 INFO L175 Difference]: Start difference. First operand has 115 places, 195 transitions, 2529 flow. Second operand 7 states and 191 transitions. [2024-06-03 19:54:34,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 245 transitions, 3365 flow [2024-06-03 19:54:35,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 245 transitions, 3193 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:35,015 INFO L231 Difference]: Finished difference. Result has 118 places, 204 transitions, 2781 flow [2024-06-03 19:54:35,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2781, PETRI_PLACES=118, PETRI_TRANSITIONS=204} [2024-06-03 19:54:35,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-03 19:54:35,016 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 204 transitions, 2781 flow [2024-06-03 19:54:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:35,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:35,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:35,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:54:35,017 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:35,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2108170159, now seen corresponding path program 1 times [2024-06-03 19:54:35,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:35,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019764896] [2024-06-03 19:54:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:35,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:35,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:35,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019764896] [2024-06-03 19:54:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019764896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:35,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:35,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:35,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172163578] [2024-06-03 19:54:35,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:35,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:35,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:35,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 204 transitions, 2781 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:35,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:35,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:35,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:37,708 INFO L124 PetriNetUnfolderBase]: 10002/14181 cut-off events. [2024-06-03 19:54:37,708 INFO L125 PetriNetUnfolderBase]: For 248493/248529 co-relation queries the response was YES. [2024-06-03 19:54:37,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84432 conditions, 14181 events. 10002/14181 cut-off events. For 248493/248529 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 79761 event pairs, 2882 based on Foata normal form. 38/14217 useless extension candidates. Maximal degree in co-relation 84381. Up to 13166 conditions per place. [2024-06-03 19:54:37,853 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 202 selfloop transitions, 41 changer transitions 0/250 dead transitions. [2024-06-03 19:54:37,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 250 transitions, 3605 flow [2024-06-03 19:54:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:37,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-03 19:54:37,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-03 19:54:37,855 INFO L175 Difference]: Start difference. First operand has 118 places, 204 transitions, 2781 flow. Second operand 7 states and 185 transitions. [2024-06-03 19:54:37,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 250 transitions, 3605 flow [2024-06-03 19:54:38,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 250 transitions, 3391 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 19:54:38,341 INFO L231 Difference]: Finished difference. Result has 121 places, 210 transitions, 2777 flow [2024-06-03 19:54:38,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2567, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2777, PETRI_PLACES=121, PETRI_TRANSITIONS=210} [2024-06-03 19:54:38,341 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-03 19:54:38,341 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 210 transitions, 2777 flow [2024-06-03 19:54:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:38,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:38,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:54:38,342 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:38,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:38,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2054654007, now seen corresponding path program 2 times [2024-06-03 19:54:38,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:38,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958359110] [2024-06-03 19:54:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:38,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958359110] [2024-06-03 19:54:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958359110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:39,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:54:39,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982497041] [2024-06-03 19:54:39,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:39,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:54:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:54:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:54:39,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:39,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 210 transitions, 2777 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:39,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:39,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:39,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:41,267 INFO L124 PetriNetUnfolderBase]: 9987/14146 cut-off events. [2024-06-03 19:54:41,267 INFO L125 PetriNetUnfolderBase]: For 270482/270502 co-relation queries the response was YES. [2024-06-03 19:54:41,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84688 conditions, 14146 events. 9987/14146 cut-off events. For 270482/270502 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 79430 event pairs, 3467 based on Foata normal form. 22/14166 useless extension candidates. Maximal degree in co-relation 84635. Up to 13281 conditions per place. [2024-06-03 19:54:41,375 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 201 selfloop transitions, 40 changer transitions 0/248 dead transitions. [2024-06-03 19:54:41,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 248 transitions, 3389 flow [2024-06-03 19:54:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:54:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:54:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:54:41,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:54:41,377 INFO L175 Difference]: Start difference. First operand has 121 places, 210 transitions, 2777 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:54:41,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 248 transitions, 3389 flow [2024-06-03 19:54:41,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 248 transitions, 3261 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-03 19:54:41,681 INFO L231 Difference]: Finished difference. Result has 125 places, 210 transitions, 2741 flow [2024-06-03 19:54:41,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2741, PETRI_PLACES=125, PETRI_TRANSITIONS=210} [2024-06-03 19:54:41,682 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-03 19:54:41,682 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 210 transitions, 2741 flow [2024-06-03 19:54:41,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:41,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:41,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:41,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:54:41,683 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:41,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1740208547, now seen corresponding path program 1 times [2024-06-03 19:54:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:41,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102936470] [2024-06-03 19:54:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:42,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:42,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102936470] [2024-06-03 19:54:42,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102936470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:42,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:42,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:42,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786706499] [2024-06-03 19:54:42,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:42,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:42,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:42,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:42,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:42,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 210 transitions, 2741 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:42,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:42,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:42,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:45,054 INFO L124 PetriNetUnfolderBase]: 10795/15406 cut-off events. [2024-06-03 19:54:45,055 INFO L125 PetriNetUnfolderBase]: For 322398/322408 co-relation queries the response was YES. [2024-06-03 19:54:45,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91039 conditions, 15406 events. 10795/15406 cut-off events. For 322398/322408 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 89294 event pairs, 3407 based on Foata normal form. 126/15519 useless extension candidates. Maximal degree in co-relation 90984. Up to 11689 conditions per place. [2024-06-03 19:54:45,203 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 135 selfloop transitions, 132 changer transitions 0/274 dead transitions. [2024-06-03 19:54:45,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 274 transitions, 3759 flow [2024-06-03 19:54:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-03 19:54:45,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528846153846154 [2024-06-03 19:54:45,205 INFO L175 Difference]: Start difference. First operand has 125 places, 210 transitions, 2741 flow. Second operand 8 states and 230 transitions. [2024-06-03 19:54:45,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 274 transitions, 3759 flow [2024-06-03 19:54:45,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 274 transitions, 3667 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:45,515 INFO L231 Difference]: Finished difference. Result has 127 places, 213 transitions, 2997 flow [2024-06-03 19:54:45,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2997, PETRI_PLACES=127, PETRI_TRANSITIONS=213} [2024-06-03 19:54:45,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-03 19:54:45,516 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 213 transitions, 2997 flow [2024-06-03 19:54:45,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:45,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:45,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:45,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:54:45,517 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:45,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 412103106, now seen corresponding path program 1 times [2024-06-03 19:54:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424132904] [2024-06-03 19:54:45,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:45,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:46,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:46,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424132904] [2024-06-03 19:54:46,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424132904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:46,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:46,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:54:46,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248442742] [2024-06-03 19:54:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:46,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:54:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:54:46,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:54:46,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:46,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 213 transitions, 2997 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 19:54:46,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:46,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:46,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:48,299 INFO L124 PetriNetUnfolderBase]: 10841/15418 cut-off events. [2024-06-03 19:54:48,300 INFO L125 PetriNetUnfolderBase]: For 335328/335338 co-relation queries the response was YES. [2024-06-03 19:54:48,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95759 conditions, 15418 events. 10841/15418 cut-off events. For 335328/335338 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 88294 event pairs, 3692 based on Foata normal form. 18/15432 useless extension candidates. Maximal degree in co-relation 95703. Up to 14681 conditions per place. [2024-06-03 19:54:48,455 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 216 selfloop transitions, 29 changer transitions 0/252 dead transitions. [2024-06-03 19:54:48,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 252 transitions, 3812 flow [2024-06-03 19:54:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:54:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:54:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 19:54:48,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-03 19:54:48,456 INFO L175 Difference]: Start difference. First operand has 127 places, 213 transitions, 2997 flow. Second operand 6 states and 157 transitions. [2024-06-03 19:54:48,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 252 transitions, 3812 flow [2024-06-03 19:54:48,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 252 transitions, 3502 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:48,950 INFO L231 Difference]: Finished difference. Result has 127 places, 220 transitions, 2896 flow [2024-06-03 19:54:48,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2896, PETRI_PLACES=127, PETRI_TRANSITIONS=220} [2024-06-03 19:54:48,951 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-03 19:54:48,951 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 220 transitions, 2896 flow [2024-06-03 19:54:48,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 19:54:48,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:48,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:48,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:54:48,951 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:48,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 780488037, now seen corresponding path program 2 times [2024-06-03 19:54:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886064204] [2024-06-03 19:54:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:48,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:49,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886064204] [2024-06-03 19:54:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886064204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:49,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:49,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:49,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415400744] [2024-06-03 19:54:49,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:49,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:49,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:49,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 220 transitions, 2896 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:49,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:49,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:49,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:52,436 INFO L124 PetriNetUnfolderBase]: 11038/15728 cut-off events. [2024-06-03 19:54:52,437 INFO L125 PetriNetUnfolderBase]: For 348284/348300 co-relation queries the response was YES. [2024-06-03 19:54:52,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94663 conditions, 15728 events. 11038/15728 cut-off events. For 348284/348300 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 90855 event pairs, 3517 based on Foata normal form. 30/15722 useless extension candidates. Maximal degree in co-relation 94606. Up to 12920 conditions per place. [2024-06-03 19:54:52,568 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 134 selfloop transitions, 139 changer transitions 0/280 dead transitions. [2024-06-03 19:54:52,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 280 transitions, 3946 flow [2024-06-03 19:54:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-03 19:54:52,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408653846153846 [2024-06-03 19:54:52,570 INFO L175 Difference]: Start difference. First operand has 127 places, 220 transitions, 2896 flow. Second operand 8 states and 225 transitions. [2024-06-03 19:54:52,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 280 transitions, 3946 flow [2024-06-03 19:54:52,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 280 transitions, 3570 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 19:54:52,885 INFO L231 Difference]: Finished difference. Result has 128 places, 223 transitions, 2883 flow [2024-06-03 19:54:52,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2883, PETRI_PLACES=128, PETRI_TRANSITIONS=223} [2024-06-03 19:54:52,886 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-03 19:54:52,886 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 223 transitions, 2883 flow [2024-06-03 19:54:52,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:52,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:52,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:52,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:54:52,886 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:52,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1008389187, now seen corresponding path program 3 times [2024-06-03 19:54:52,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:52,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178143974] [2024-06-03 19:54:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:52,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178143974] [2024-06-03 19:54:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178143974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492265843] [2024-06-03 19:54:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:53,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:53,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 223 transitions, 2883 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:53,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:53,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:53,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:54:56,484 INFO L124 PetriNetUnfolderBase]: 11235/16017 cut-off events. [2024-06-03 19:54:56,484 INFO L125 PetriNetUnfolderBase]: For 375621/375645 co-relation queries the response was YES. [2024-06-03 19:54:56,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99238 conditions, 16017 events. 11235/16017 cut-off events. For 375621/375645 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 92738 event pairs, 3462 based on Foata normal form. 38/16019 useless extension candidates. Maximal degree in co-relation 99182. Up to 13215 conditions per place. [2024-06-03 19:54:56,654 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 128 selfloop transitions, 147 changer transitions 0/282 dead transitions. [2024-06-03 19:54:56,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 282 transitions, 3867 flow [2024-06-03 19:54:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:54:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:54:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-03 19:54:56,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-03 19:54:56,656 INFO L175 Difference]: Start difference. First operand has 128 places, 223 transitions, 2883 flow. Second operand 8 states and 224 transitions. [2024-06-03 19:54:56,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 282 transitions, 3867 flow [2024-06-03 19:54:57,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 282 transitions, 3540 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:54:57,073 INFO L231 Difference]: Finished difference. Result has 130 places, 226 transitions, 2941 flow [2024-06-03 19:54:57,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2941, PETRI_PLACES=130, PETRI_TRANSITIONS=226} [2024-06-03 19:54:57,073 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-03 19:54:57,074 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 226 transitions, 2941 flow [2024-06-03 19:54:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:57,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:54:57,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:54:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:54:57,074 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:54:57,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:54:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1016960067, now seen corresponding path program 4 times [2024-06-03 19:54:57,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:54:57,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109837361] [2024-06-03 19:54:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:54:57,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:54:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:54:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:54:58,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:54:58,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109837361] [2024-06-03 19:54:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109837361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:54:58,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:54:58,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:54:58,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710514580] [2024-06-03 19:54:58,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:54:58,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:54:58,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:54:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:54:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:54:58,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:54:58,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 226 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:54:58,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:54:58,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:54:58,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:00,703 INFO L124 PetriNetUnfolderBase]: 11381/16227 cut-off events. [2024-06-03 19:55:00,703 INFO L125 PetriNetUnfolderBase]: For 405171/405195 co-relation queries the response was YES. [2024-06-03 19:55:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101941 conditions, 16227 events. 11381/16227 cut-off events. For 405171/405195 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 94393 event pairs, 3142 based on Foata normal form. 38/16229 useless extension candidates. Maximal degree in co-relation 101884. Up to 11653 conditions per place. [2024-06-03 19:55:00,862 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 125 selfloop transitions, 158 changer transitions 0/290 dead transitions. [2024-06-03 19:55:00,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 290 transitions, 3971 flow [2024-06-03 19:55:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-03 19:55:00,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504807692307693 [2024-06-03 19:55:00,864 INFO L175 Difference]: Start difference. First operand has 130 places, 226 transitions, 2941 flow. Second operand 8 states and 229 transitions. [2024-06-03 19:55:00,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 290 transitions, 3971 flow [2024-06-03 19:55:01,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 290 transitions, 3622 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:01,322 INFO L231 Difference]: Finished difference. Result has 132 places, 229 transitions, 3002 flow [2024-06-03 19:55:01,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3002, PETRI_PLACES=132, PETRI_TRANSITIONS=229} [2024-06-03 19:55:01,323 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-03 19:55:01,323 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 229 transitions, 3002 flow [2024-06-03 19:55:01,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:01,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:01,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:55:01,323 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:01,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1299962946, now seen corresponding path program 2 times [2024-06-03 19:55:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:01,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461451879] [2024-06-03 19:55:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:02,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461451879] [2024-06-03 19:55:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461451879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:02,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:02,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638695094] [2024-06-03 19:55:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:02,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:02,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:02,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:55:02,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 229 transitions, 3002 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 19:55:02,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:02,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:55:02,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:04,719 INFO L124 PetriNetUnfolderBase]: 11359/16197 cut-off events. [2024-06-03 19:55:04,720 INFO L125 PetriNetUnfolderBase]: For 422779/422801 co-relation queries the response was YES. [2024-06-03 19:55:04,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103481 conditions, 16197 events. 11359/16197 cut-off events. For 422779/422801 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 94030 event pairs, 3815 based on Foata normal form. 26/16220 useless extension candidates. Maximal degree in co-relation 103423. Up to 15438 conditions per place. [2024-06-03 19:55:04,858 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 217 selfloop transitions, 29 changer transitions 0/253 dead transitions. [2024-06-03 19:55:04,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 253 transitions, 3580 flow [2024-06-03 19:55:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 19:55:04,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-03 19:55:04,859 INFO L175 Difference]: Start difference. First operand has 132 places, 229 transitions, 3002 flow. Second operand 6 states and 148 transitions. [2024-06-03 19:55:04,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 253 transitions, 3580 flow [2024-06-03 19:55:05,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 253 transitions, 3176 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 19:55:05,293 INFO L231 Difference]: Finished difference. Result has 132 places, 229 transitions, 2668 flow [2024-06-03 19:55:05,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2598, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2668, PETRI_PLACES=132, PETRI_TRANSITIONS=229} [2024-06-03 19:55:05,293 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-03 19:55:05,293 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 229 transitions, 2668 flow [2024-06-03 19:55:05,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 19:55:05,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:05,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:55:05,294 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:05,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:05,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1968016410, now seen corresponding path program 1 times [2024-06-03 19:55:05,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:05,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464223183] [2024-06-03 19:55:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464223183] [2024-06-03 19:55:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464223183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:06,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:06,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:06,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660674259] [2024-06-03 19:55:06,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:06,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:06,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:55:06,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 229 transitions, 2668 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:06,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:06,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:55:06,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:08,594 INFO L124 PetriNetUnfolderBase]: 10227/14956 cut-off events. [2024-06-03 19:55:08,594 INFO L125 PetriNetUnfolderBase]: For 365359/365361 co-relation queries the response was YES. [2024-06-03 19:55:08,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90880 conditions, 14956 events. 10227/14956 cut-off events. For 365359/365361 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 89568 event pairs, 3356 based on Foata normal form. 8/14956 useless extension candidates. Maximal degree in co-relation 90821. Up to 13898 conditions per place. [2024-06-03 19:55:08,761 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 226 selfloop transitions, 25 changer transitions 0/259 dead transitions. [2024-06-03 19:55:08,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 259 transitions, 3399 flow [2024-06-03 19:55:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:55:08,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-03 19:55:08,763 INFO L175 Difference]: Start difference. First operand has 132 places, 229 transitions, 2668 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:55:08,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 259 transitions, 3399 flow [2024-06-03 19:55:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 259 transitions, 3318 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:09,165 INFO L231 Difference]: Finished difference. Result has 133 places, 233 transitions, 2703 flow [2024-06-03 19:55:09,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2703, PETRI_PLACES=133, PETRI_TRANSITIONS=233} [2024-06-03 19:55:09,166 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-03 19:55:09,166 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 233 transitions, 2703 flow [2024-06-03 19:55:09,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:09,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:09,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:09,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:55:09,167 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:09,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1299968898, now seen corresponding path program 2 times [2024-06-03 19:55:09,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:09,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860045536] [2024-06-03 19:55:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:09,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860045536] [2024-06-03 19:55:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860045536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:09,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:09,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:55:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056397748] [2024-06-03 19:55:09,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:09,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:55:09,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:55:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:55:10,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-03 19:55:10,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 233 transitions, 2703 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:10,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:10,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-03 19:55:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:11,922 INFO L124 PetriNetUnfolderBase]: 10075/14684 cut-off events. [2024-06-03 19:55:11,922 INFO L125 PetriNetUnfolderBase]: For 380081/380083 co-relation queries the response was YES. [2024-06-03 19:55:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90522 conditions, 14684 events. 10075/14684 cut-off events. For 380081/380083 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 86971 event pairs, 3276 based on Foata normal form. 4/14682 useless extension candidates. Maximal degree in co-relation 90462. Up to 13682 conditions per place. [2024-06-03 19:55:12,096 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 220 selfloop transitions, 26 changer transitions 0/254 dead transitions. [2024-06-03 19:55:12,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 254 transitions, 3257 flow [2024-06-03 19:55:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:55:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:55:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 19:55:12,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-03 19:55:12,098 INFO L175 Difference]: Start difference. First operand has 133 places, 233 transitions, 2703 flow. Second operand 6 states and 157 transitions. [2024-06-03 19:55:12,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 254 transitions, 3257 flow [2024-06-03 19:55:12,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 254 transitions, 3202 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:12,541 INFO L231 Difference]: Finished difference. Result has 136 places, 233 transitions, 2709 flow [2024-06-03 19:55:12,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2709, PETRI_PLACES=136, PETRI_TRANSITIONS=233} [2024-06-03 19:55:12,541 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-03 19:55:12,541 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 233 transitions, 2709 flow [2024-06-03 19:55:12,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:12,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:12,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:12,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:55:12,542 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:12,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 641670367, now seen corresponding path program 1 times [2024-06-03 19:55:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985684684] [2024-06-03 19:55:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:13,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:13,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985684684] [2024-06-03 19:55:13,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985684684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:13,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:13,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:13,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345813374] [2024-06-03 19:55:13,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:13,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:13,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:13,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:13,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:55:13,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 233 transitions, 2709 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:13,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:13,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:55:13,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:16,266 INFO L124 PetriNetUnfolderBase]: 13480/19551 cut-off events. [2024-06-03 19:55:16,267 INFO L125 PetriNetUnfolderBase]: For 622283/622285 co-relation queries the response was YES. [2024-06-03 19:55:16,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123794 conditions, 19551 events. 13480/19551 cut-off events. For 622283/622285 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 121630 event pairs, 3452 based on Foata normal form. 90/19625 useless extension candidates. Maximal degree in co-relation 123733. Up to 10646 conditions per place. [2024-06-03 19:55:16,565 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 175 selfloop transitions, 132 changer transitions 0/314 dead transitions. [2024-06-03 19:55:16,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 314 transitions, 4171 flow [2024-06-03 19:55:16,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-03 19:55:16,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745192307692307 [2024-06-03 19:55:16,566 INFO L175 Difference]: Start difference. First operand has 136 places, 233 transitions, 2709 flow. Second operand 8 states and 239 transitions. [2024-06-03 19:55:16,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 314 transitions, 4171 flow [2024-06-03 19:55:17,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 314 transitions, 4079 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:55:17,563 INFO L231 Difference]: Finished difference. Result has 139 places, 241 transitions, 3171 flow [2024-06-03 19:55:17,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3171, PETRI_PLACES=139, PETRI_TRANSITIONS=241} [2024-06-03 19:55:17,564 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-03 19:55:17,564 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 241 transitions, 3171 flow [2024-06-03 19:55:17,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:17,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:17,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:17,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:55:17,565 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:17,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 730236127, now seen corresponding path program 2 times [2024-06-03 19:55:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386447537] [2024-06-03 19:55:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:18,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386447537] [2024-06-03 19:55:18,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386447537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:18,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:18,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:18,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329767327] [2024-06-03 19:55:18,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:18,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:18,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:18,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:18,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:55:18,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 241 transitions, 3171 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:18,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:18,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:55:18,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:22,221 INFO L124 PetriNetUnfolderBase]: 15028/21986 cut-off events. [2024-06-03 19:55:22,222 INFO L125 PetriNetUnfolderBase]: For 772770/772772 co-relation queries the response was YES. [2024-06-03 19:55:22,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146496 conditions, 21986 events. 15028/21986 cut-off events. For 772770/772772 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 142285 event pairs, 4850 based on Foata normal form. 90/22060 useless extension candidates. Maximal degree in co-relation 146433. Up to 15581 conditions per place. [2024-06-03 19:55:22,720 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 163 selfloop transitions, 142 changer transitions 0/312 dead transitions. [2024-06-03 19:55:22,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 312 transitions, 4487 flow [2024-06-03 19:55:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-03 19:55:22,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 19:55:22,724 INFO L175 Difference]: Start difference. First operand has 139 places, 241 transitions, 3171 flow. Second operand 8 states and 234 transitions. [2024-06-03 19:55:22,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 312 transitions, 4487 flow [2024-06-03 19:55:23,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 312 transitions, 4278 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-03 19:55:23,813 INFO L231 Difference]: Finished difference. Result has 145 places, 247 transitions, 3456 flow [2024-06-03 19:55:23,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3456, PETRI_PLACES=145, PETRI_TRANSITIONS=247} [2024-06-03 19:55:23,814 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-03 19:55:23,814 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 247 transitions, 3456 flow [2024-06-03 19:55:23,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:23,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:23,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:23,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:55:23,815 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:23,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:23,816 INFO L85 PathProgramCache]: Analyzing trace with hash -452012804, now seen corresponding path program 1 times [2024-06-03 19:55:23,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:23,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4013291] [2024-06-03 19:55:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:23,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:24,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:24,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4013291] [2024-06-03 19:55:24,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4013291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:24,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:24,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:55:24,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849185301] [2024-06-03 19:55:24,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:24,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:55:24,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:55:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:55:24,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:55:24,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 247 transitions, 3456 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:24,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:24,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:55:24,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:28,625 INFO L124 PetriNetUnfolderBase]: 15220/22353 cut-off events. [2024-06-03 19:55:28,625 INFO L125 PetriNetUnfolderBase]: For 804655/804673 co-relation queries the response was YES. [2024-06-03 19:55:28,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152391 conditions, 22353 events. 15220/22353 cut-off events. For 804655/804673 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 145800 event pairs, 5125 based on Foata normal form. 42/22379 useless extension candidates. Maximal degree in co-relation 152325. Up to 19055 conditions per place. [2024-06-03 19:55:28,924 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 147 selfloop transitions, 148 changer transitions 0/302 dead transitions. [2024-06-03 19:55:28,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 302 transitions, 4611 flow [2024-06-03 19:55:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:55:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:55:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-03 19:55:28,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-03 19:55:28,926 INFO L175 Difference]: Start difference. First operand has 145 places, 247 transitions, 3456 flow. Second operand 7 states and 197 transitions. [2024-06-03 19:55:28,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 302 transitions, 4611 flow [2024-06-03 19:55:30,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 302 transitions, 4235 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:55:30,020 INFO L231 Difference]: Finished difference. Result has 147 places, 258 transitions, 3590 flow [2024-06-03 19:55:30,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3590, PETRI_PLACES=147, PETRI_TRANSITIONS=258} [2024-06-03 19:55:30,020 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-03 19:55:30,020 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 258 transitions, 3590 flow [2024-06-03 19:55:30,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:30,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:30,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:30,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:55:30,021 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:30,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:30,022 INFO L85 PathProgramCache]: Analyzing trace with hash -949012299, now seen corresponding path program 3 times [2024-06-03 19:55:30,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:30,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839347020] [2024-06-03 19:55:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:30,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:30,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:30,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839347020] [2024-06-03 19:55:30,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839347020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:30,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:30,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:30,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358923217] [2024-06-03 19:55:30,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:30,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:30,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:31,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:55:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 258 transitions, 3590 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:55:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:55:35,497 INFO L124 PetriNetUnfolderBase]: 16535/24434 cut-off events. [2024-06-03 19:55:35,497 INFO L125 PetriNetUnfolderBase]: For 911554/911572 co-relation queries the response was YES. [2024-06-03 19:55:35,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164562 conditions, 24434 events. 16535/24434 cut-off events. For 911554/911572 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 163360 event pairs, 4823 based on Foata normal form. 96/24514 useless extension candidates. Maximal degree in co-relation 164495. Up to 18361 conditions per place. [2024-06-03 19:55:35,750 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 175 selfloop transitions, 151 changer transitions 0/333 dead transitions. [2024-06-03 19:55:35,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 333 transitions, 5050 flow [2024-06-03 19:55:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:55:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:55:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-03 19:55:35,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697115384615384 [2024-06-03 19:55:35,752 INFO L175 Difference]: Start difference. First operand has 147 places, 258 transitions, 3590 flow. Second operand 8 states and 237 transitions. [2024-06-03 19:55:35,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 333 transitions, 5050 flow [2024-06-03 19:55:36,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 333 transitions, 4787 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:55:36,806 INFO L231 Difference]: Finished difference. Result has 152 places, 263 transitions, 3822 flow [2024-06-03 19:55:36,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3822, PETRI_PLACES=152, PETRI_TRANSITIONS=263} [2024-06-03 19:55:36,806 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-03 19:55:36,806 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 263 transitions, 3822 flow [2024-06-03 19:55:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:36,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:55:36,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:55:36,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:55:36,807 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:55:36,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:55:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -943502049, now seen corresponding path program 4 times [2024-06-03 19:55:36,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:55:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008517078] [2024-06-03 19:55:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:55:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:55:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:55:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:55:37,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:55:37,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008517078] [2024-06-03 19:55:37,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008517078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:55:37,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:55:37,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:55:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520044061] [2024-06-03 19:55:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:55:37,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:55:37,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:55:37,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:55:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:55:37,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-03 19:55:37,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 263 transitions, 3822 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:55:37,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:55:37,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-03 19:55:37,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand