./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix051_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix051_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix051_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:28:06,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:28:06,731 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:28:06,737 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:28:06,737 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:28:06,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:28:06,768 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:28:06,768 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:28:06,769 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:28:06,772 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:28:06,772 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:28:06,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:28:06,773 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:28:06,774 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:28:06,774 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:28:06,774 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:28:06,775 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:28:06,775 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:28:06,775 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:28:06,775 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:28:06,776 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:28:06,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:28:06,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:28:06,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:28:06,777 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:28:06,778 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:28:06,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:28:06,778 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:28:06,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:28:06,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:28:06,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:28:06,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:28:06,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:28:06,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:28:06,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:28:06,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:28:06,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:28:06,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:28:06,781 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:28:06,781 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:28:06,781 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:28:06,782 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:28:06,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:28:06,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:28:07,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:28:07,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:28:07,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:28:07,043 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:28:07,043 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:28:07,044 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i [2024-06-20 16:28:08,154 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:28:08,377 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:28:08,377 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix051_tso.oepc.i [2024-06-20 16:28:08,393 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85484230b/00174ca773f844819d8f9ad82dfb112d/FLAG48bbadc31 [2024-06-20 16:28:08,405 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85484230b/00174ca773f844819d8f9ad82dfb112d [2024-06-20 16:28:08,407 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:28:08,407 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:28:08,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix051_tso.oepc.yml/witness.yml [2024-06-20 16:28:08,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:28:08,580 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:28:08,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:28:08,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:28:08,584 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:28:08,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:28:08" (1/2) ... [2024-06-20 16:28:08,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c58468a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:28:08, skipping insertion in model container [2024-06-20 16:28:08,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:28:08" (1/2) ... [2024-06-20 16:28:08,587 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b8589fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:28:08, skipping insertion in model container [2024-06-20 16:28:08,587 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:08" (2/2) ... [2024-06-20 16:28:08,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c58468a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:08, skipping insertion in model container [2024-06-20 16:28:08,588 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:08" (2/2) ... [2024-06-20 16:28:08,589 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:28:08,688 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:28:08,689 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-20 16:28:08,690 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-20 16:28:08,690 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-20 16:28:08,690 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-20 16:28:08,690 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:28:08,691 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-20 16:28:08,733 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:28:09,035 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:28:09,048 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:28:09,148 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:28:09,184 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:28:09,184 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09 WrapperNode [2024-06-20 16:28:09,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:28:09,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:28:09,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:28:09,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:28:09,194 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 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,210 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 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,251 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-20 16:28:09,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:28:09,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:28:09,256 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:28:09,256 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:28:09,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,281 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,302 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]. [2024-06-20 16:28:09,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,312 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,324 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,331 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:28:09,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:28:09,337 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:28:09,337 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:28:09,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (1/1) ... [2024-06-20 16:28:09,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:28:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:28:09,359 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) [2024-06-20 16:28:09,378 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 [2024-06-20 16:28:09,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:28:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:28:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:28:09,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:28:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:28:09,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:28:09,393 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:28:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:28:09,393 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:28:09,393 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:28:09,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:28:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:28:09,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:28:09,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:28:09,395 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:28:09,499 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:28:09,500 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:28:09,856 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:28:09,857 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:28:09,997 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:28:09,997 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:28:09,998 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:28:09 BoogieIcfgContainer [2024-06-20 16:28:09,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:28:10,000 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:28:10,000 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:28:10,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:28:10,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:28:08" (1/4) ... [2024-06-20 16:28:10,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ab6ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:28:10, skipping insertion in model container [2024-06-20 16:28:10,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:28:08" (2/4) ... [2024-06-20 16:28:10,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ab6ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:28:10, skipping insertion in model container [2024-06-20 16:28:10,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:28:09" (3/4) ... [2024-06-20 16:28:10,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ab6ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:28:10, skipping insertion in model container [2024-06-20 16:28:10,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:28:09" (4/4) ... [2024-06-20 16:28:10,005 INFO L112 eAbstractionObserver]: Analyzing ICFG mix051_tso.oepc.i [2024-06-20 16:28:10,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:28:10,019 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:28:10,019 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:28:10,093 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:28:10,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:28:10,155 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-20 16:28:10,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:28:10,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:28:10,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-20 16:28:10,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-20 16:28:10,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:28:10,223 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;@757aaaae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:28:10,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:28:10,226 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:28:10,226 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:28:10,227 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:28:10,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:10,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:28:10,228 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)] === [2024-06-20 16:28:10,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:10,263 INFO L85 PathProgramCache]: Analyzing trace with hash 400202035, now seen corresponding path program 1 times [2024-06-20 16:28:10,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:10,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010991639] [2024-06-20 16:28:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:10,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:11,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:11,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010991639] [2024-06-20 16:28:11,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010991639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:11,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:11,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:28:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723778554] [2024-06-20 16:28:11,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:11,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:28:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:28:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:28:11,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-20 16:28:11,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:11,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:11,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-20 16:28:11,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:12,932 INFO L124 PetriNetUnfolderBase]: 8192/11588 cut-off events. [2024-06-20 16:28:12,933 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-06-20 16:28:12,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23151 conditions, 11588 events. 8192/11588 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63990 event pairs, 6310 based on Foata normal form. 1/11373 useless extension candidates. Maximal degree in co-relation 23138. Up to 11172 conditions per place. [2024-06-20 16:28:12,997 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-20 16:28:12,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-20 16:28:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:28:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:28:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-20 16:28:13,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-20 16:28:13,009 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 93 transitions. [2024-06-20 16:28:13,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-20 16:28:13,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:13,017 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-20 16:28:13,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-20 16:28:13,021 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-20 16:28:13,022 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-20 16:28:13,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:13,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:13,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:13,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:28:13,023 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)] === [2024-06-20 16:28:13,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1952851310, now seen corresponding path program 1 times [2024-06-20 16:28:13,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:13,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835151076] [2024-06-20 16:28:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:13,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835151076] [2024-06-20 16:28:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835151076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:13,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:13,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:28:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60598074] [2024-06-20 16:28:13,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:13,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:28:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:28:13,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:28:13,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:13,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:13,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:13,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:13,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:15,363 INFO L124 PetriNetUnfolderBase]: 9577/13187 cut-off events. [2024-06-20 16:28:15,363 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2024-06-20 16:28:15,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30036 conditions, 13187 events. 9577/13187 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70148 event pairs, 6775 based on Foata normal form. 4/13158 useless extension candidates. Maximal degree in co-relation 30024. Up to 12982 conditions per place. [2024-06-20 16:28:15,428 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-20 16:28:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 319 flow [2024-06-20 16:28:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:28:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:28:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-20 16:28:15,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-20 16:28:15,430 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 118 transitions. [2024-06-20 16:28:15,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 319 flow [2024-06-20 16:28:15,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:28:15,432 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-20 16:28:15,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:28:15,433 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-20 16:28:15,433 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-20 16:28:15,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:15,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:15,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:15,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:28:15,434 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)] === [2024-06-20 16:28:15,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:15,434 INFO L85 PathProgramCache]: Analyzing trace with hash -408846852, now seen corresponding path program 1 times [2024-06-20 16:28:15,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:15,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504179239] [2024-06-20 16:28:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:15,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:16,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:16,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504179239] [2024-06-20 16:28:16,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504179239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:16,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:16,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:28:16,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613989984] [2024-06-20 16:28:16,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:16,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:28:16,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:16,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:28:16,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:28:16,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:16,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:16,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:16,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:16,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:17,522 INFO L124 PetriNetUnfolderBase]: 9557/13165 cut-off events. [2024-06-20 16:28:17,523 INFO L125 PetriNetUnfolderBase]: For 7067/7067 co-relation queries the response was YES. [2024-06-20 16:28:17,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33389 conditions, 13165 events. 9557/13165 cut-off events. For 7067/7067 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70104 event pairs, 5407 based on Foata normal form. 8/13140 useless extension candidates. Maximal degree in co-relation 33375. Up to 12912 conditions per place. [2024-06-20 16:28:17,599 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 64 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-20 16:28:17,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 431 flow [2024-06-20 16:28:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:17,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2024-06-20 16:28:17,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725490196078431 [2024-06-20 16:28:17,604 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 146 transitions. [2024-06-20 16:28:17,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 431 flow [2024-06-20 16:28:17,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 412 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:28:17,610 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 225 flow [2024-06-20 16:28:17,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-06-20 16:28:17,611 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-06-20 16:28:17,611 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 225 flow [2024-06-20 16:28:17,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:17,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:17,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:17,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:28:17,612 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)] === [2024-06-20 16:28:17,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1202062927, now seen corresponding path program 1 times [2024-06-20 16:28:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124277840] [2024-06-20 16:28:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:17,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:18,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:18,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124277840] [2024-06-20 16:28:18,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124277840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:18,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:18,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:18,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085686462] [2024-06-20 16:28:18,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:18,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:19,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-20 16:28:19,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:19,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:19,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-20 16:28:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:20,380 INFO L124 PetriNetUnfolderBase]: 9541/13143 cut-off events. [2024-06-20 16:28:20,381 INFO L125 PetriNetUnfolderBase]: For 13690/13690 co-relation queries the response was YES. [2024-06-20 16:28:20,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36701 conditions, 13143 events. 9541/13143 cut-off events. For 13690/13690 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 69902 event pairs, 4602 based on Foata normal form. 8/13118 useless extension candidates. Maximal degree in co-relation 36686. Up to 12846 conditions per place. [2024-06-20 16:28:20,457 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 71 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-20 16:28:20,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 515 flow [2024-06-20 16:28:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-20 16:28:20,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522875816993464 [2024-06-20 16:28:20,458 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 225 flow. Second operand 6 states and 169 transitions. [2024-06-20 16:28:20,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 515 flow [2024-06-20 16:28:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 482 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:20,465 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 256 flow [2024-06-20 16:28:20,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-20 16:28:20,466 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-20 16:28:20,466 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 256 flow [2024-06-20 16:28:20,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:20,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:20,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:28:20,467 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)] === [2024-06-20 16:28:20,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1198197421, now seen corresponding path program 1 times [2024-06-20 16:28:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478008974] [2024-06-20 16:28:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478008974] [2024-06-20 16:28:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478008974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:21,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:28:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521527376] [2024-06-20 16:28:21,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:28:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:28:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:28:21,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-20 16:28:21,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:21,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:21,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-20 16:28:21,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:22,605 INFO L124 PetriNetUnfolderBase]: 8137/11567 cut-off events. [2024-06-20 16:28:22,606 INFO L125 PetriNetUnfolderBase]: For 18131/18131 co-relation queries the response was YES. [2024-06-20 16:28:22,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34439 conditions, 11567 events. 8137/11567 cut-off events. For 18131/18131 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 64197 event pairs, 4690 based on Foata normal form. 3/11567 useless extension candidates. Maximal degree in co-relation 34422. Up to 11079 conditions per place. [2024-06-20 16:28:22,679 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 59 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-20 16:28:22,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 464 flow [2024-06-20 16:28:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 16:28:22,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2024-06-20 16:28:22,681 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 256 flow. Second operand 5 states and 121 transitions. [2024-06-20 16:28:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 464 flow [2024-06-20 16:28:22,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 418 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:22,687 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 275 flow [2024-06-20 16:28:22,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-20 16:28:22,688 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-06-20 16:28:22,688 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 275 flow [2024-06-20 16:28:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:22,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:22,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:22,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:28:22,689 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)] === [2024-06-20 16:28:22,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:22,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1430906450, now seen corresponding path program 1 times [2024-06-20 16:28:22,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256438895] [2024-06-20 16:28:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:22,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:23,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:23,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256438895] [2024-06-20 16:28:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256438895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:23,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:23,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:23,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007946446] [2024-06-20 16:28:23,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:23,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:23,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:23,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:23,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:23,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:23,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:24,925 INFO L124 PetriNetUnfolderBase]: 9554/13191 cut-off events. [2024-06-20 16:28:24,925 INFO L125 PetriNetUnfolderBase]: For 30986/30986 co-relation queries the response was YES. [2024-06-20 16:28:24,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42730 conditions, 13191 events. 9554/13191 cut-off events. For 30986/30986 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70211 event pairs, 5494 based on Foata normal form. 3/13191 useless extension candidates. Maximal degree in co-relation 42711. Up to 12933 conditions per place. [2024-06-20 16:28:24,997 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 70 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-20 16:28:24,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 545 flow [2024-06-20 16:28:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:24,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 16:28:24,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-20 16:28:24,998 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 275 flow. Second operand 6 states and 142 transitions. [2024-06-20 16:28:24,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 545 flow [2024-06-20 16:28:25,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 512 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:25,004 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 321 flow [2024-06-20 16:28:25,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-20 16:28:25,005 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-06-20 16:28:25,005 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 321 flow [2024-06-20 16:28:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:25,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:25,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:28:25,005 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)] === [2024-06-20 16:28:25,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1458761810, now seen corresponding path program 2 times [2024-06-20 16:28:25,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:25,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638331383] [2024-06-20 16:28:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638331383] [2024-06-20 16:28:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638331383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:25,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:25,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858169408] [2024-06-20 16:28:25,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:25,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:26,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:26,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 321 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:26,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:26,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:26,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:27,294 INFO L124 PetriNetUnfolderBase]: 9545/13200 cut-off events. [2024-06-20 16:28:27,294 INFO L125 PetriNetUnfolderBase]: For 41921/41937 co-relation queries the response was YES. [2024-06-20 16:28:27,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46032 conditions, 13200 events. 9545/13200 cut-off events. For 41921/41937 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 70440 event pairs, 5476 based on Foata normal form. 15/13210 useless extension candidates. Maximal degree in co-relation 46012. Up to 12891 conditions per place. [2024-06-20 16:28:27,369 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 64 selfloop transitions, 21 changer transitions 0/91 dead transitions. [2024-06-20 16:28:27,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 593 flow [2024-06-20 16:28:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:28:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:28:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 16:28:27,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-06-20 16:28:27,371 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 321 flow. Second operand 6 states and 141 transitions. [2024-06-20 16:28:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 593 flow [2024-06-20 16:28:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 546 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:27,378 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 375 flow [2024-06-20 16:28:27,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-20 16:28:27,379 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-20 16:28:27,379 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 375 flow [2024-06-20 16:28:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:27,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:27,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:27,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:28:27,380 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)] === [2024-06-20 16:28:27,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash -442353686, now seen corresponding path program 1 times [2024-06-20 16:28:27,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:27,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164997818] [2024-06-20 16:28:27,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:28,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:28,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164997818] [2024-06-20 16:28:28,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164997818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:28,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916563987] [2024-06-20 16:28:28,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:28,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:28,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:28,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 375 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:28,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:28,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:28,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:30,022 INFO L124 PetriNetUnfolderBase]: 9900/13960 cut-off events. [2024-06-20 16:28:30,022 INFO L125 PetriNetUnfolderBase]: For 54652/54652 co-relation queries the response was YES. [2024-06-20 16:28:30,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51105 conditions, 13960 events. 9900/13960 cut-off events. For 54652/54652 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 76990 event pairs, 5554 based on Foata normal form. 3/13960 useless extension candidates. Maximal degree in co-relation 51084. Up to 13410 conditions per place. [2024-06-20 16:28:30,104 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 82 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2024-06-20 16:28:30,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 716 flow [2024-06-20 16:28:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 16:28:30,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-20 16:28:30,106 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 375 flow. Second operand 7 states and 161 transitions. [2024-06-20 16:28:30,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 716 flow [2024-06-20 16:28:30,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 106 transitions, 642 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:30,116 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 424 flow [2024-06-20 16:28:30,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=306, 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=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-20 16:28:30,117 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-20 16:28:30,117 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 424 flow [2024-06-20 16:28:30,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:30,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:30,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:30,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:28:30,118 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)] === [2024-06-20 16:28:30,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1408307914, now seen corresponding path program 1 times [2024-06-20 16:28:30,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:30,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195687355] [2024-06-20 16:28:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:31,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:31,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195687355] [2024-06-20 16:28:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195687355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867109885] [2024-06-20 16:28:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:31,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:31,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 424 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:31,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:31,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:31,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:32,881 INFO L124 PetriNetUnfolderBase]: 11376/15648 cut-off events. [2024-06-20 16:28:32,881 INFO L125 PetriNetUnfolderBase]: For 83526/83542 co-relation queries the response was YES. [2024-06-20 16:28:32,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62897 conditions, 15648 events. 11376/15648 cut-off events. For 83526/83542 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 84521 event pairs, 5611 based on Foata normal form. 6/15651 useless extension candidates. Maximal degree in co-relation 62874. Up to 15319 conditions per place. [2024-06-20 16:28:32,955 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 92 selfloop transitions, 22 changer transitions 0/121 dead transitions. [2024-06-20 16:28:32,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 812 flow [2024-06-20 16:28:32,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:28:32,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-20 16:28:32,959 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 424 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:28:32,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 812 flow [2024-06-20 16:28:32,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 751 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:32,983 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 495 flow [2024-06-20 16:28:32,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=495, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-20 16:28:32,984 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2024-06-20 16:28:32,984 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 495 flow [2024-06-20 16:28:32,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:32,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:32,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:32,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:28:32,987 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)] === [2024-06-20 16:28:32,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:32,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1005439020, now seen corresponding path program 2 times [2024-06-20 16:28:32,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:32,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187818036] [2024-06-20 16:28:32,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:33,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:33,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187818036] [2024-06-20 16:28:33,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187818036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:33,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:33,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:33,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880542418] [2024-06-20 16:28:33,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:33,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:33,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:34,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:34,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 495 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:34,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:34,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:34,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:35,810 INFO L124 PetriNetUnfolderBase]: 11671/16089 cut-off events. [2024-06-20 16:28:35,811 INFO L125 PetriNetUnfolderBase]: For 109323/109339 co-relation queries the response was YES. [2024-06-20 16:28:35,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70235 conditions, 16089 events. 11671/16089 cut-off events. For 109323/109339 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87111 event pairs, 5097 based on Foata normal form. 28/16114 useless extension candidates. Maximal degree in co-relation 70210. Up to 15533 conditions per place. [2024-06-20 16:28:35,906 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 94 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-20 16:28:35,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 1031 flow [2024-06-20 16:28:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 16:28:35,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48739495798319327 [2024-06-20 16:28:35,909 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 495 flow. Second operand 7 states and 174 transitions. [2024-06-20 16:28:35,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 1031 flow [2024-06-20 16:28:35,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 133 transitions, 967 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:35,924 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 653 flow [2024-06-20 16:28:35,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=653, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-20 16:28:35,925 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2024-06-20 16:28:35,925 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 653 flow [2024-06-20 16:28:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:35,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:28:35,926 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)] === [2024-06-20 16:28:35,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:35,926 INFO L85 PathProgramCache]: Analyzing trace with hash -828307500, now seen corresponding path program 3 times [2024-06-20 16:28:35,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:35,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780547284] [2024-06-20 16:28:35,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:35,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:36,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:36,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780547284] [2024-06-20 16:28:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780547284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:36,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:36,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:28:36,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942714818] [2024-06-20 16:28:36,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:28:36,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:28:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:28:36,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:36,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 653 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:36,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:36,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:36,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:38,833 INFO L124 PetriNetUnfolderBase]: 11688/16094 cut-off events. [2024-06-20 16:28:38,833 INFO L125 PetriNetUnfolderBase]: For 139884/139902 co-relation queries the response was YES. [2024-06-20 16:28:38,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76124 conditions, 16094 events. 11688/16094 cut-off events. For 139884/139902 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87190 event pairs, 4844 based on Foata normal form. 28/16113 useless extension candidates. Maximal degree in co-relation 76097. Up to 15325 conditions per place. [2024-06-20 16:28:38,944 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 86 selfloop transitions, 51 changer transitions 0/144 dead transitions. [2024-06-20 16:28:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 144 transitions, 1301 flow [2024-06-20 16:28:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:28:38,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-20 16:28:38,946 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 653 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:28:38,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 144 transitions, 1301 flow [2024-06-20 16:28:38,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 144 transitions, 1233 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:38,976 INFO L231 Difference]: Finished difference. Result has 85 places, 103 transitions, 862 flow [2024-06-20 16:28:38,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=862, PETRI_PLACES=85, PETRI_TRANSITIONS=103} [2024-06-20 16:28:38,977 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 31 predicate places. [2024-06-20 16:28:38,977 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 103 transitions, 862 flow [2024-06-20 16:28:38,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:38,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:38,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:38,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:28:38,978 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)] === [2024-06-20 16:28:38,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:38,978 INFO L85 PathProgramCache]: Analyzing trace with hash 27245418, now seen corresponding path program 1 times [2024-06-20 16:28:38,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:38,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952100375] [2024-06-20 16:28:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:38,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:40,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:40,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952100375] [2024-06-20 16:28:40,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952100375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:40,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:40,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:40,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162049580] [2024-06-20 16:28:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:40,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:40,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:40,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 103 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:40,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:40,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:40,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:41,910 INFO L124 PetriNetUnfolderBase]: 10292/14422 cut-off events. [2024-06-20 16:28:41,911 INFO L125 PetriNetUnfolderBase]: For 140103/140103 co-relation queries the response was YES. [2024-06-20 16:28:41,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70996 conditions, 14422 events. 10292/14422 cut-off events. For 140103/140103 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 79228 event pairs, 4453 based on Foata normal form. 6/14425 useless extension candidates. Maximal degree in co-relation 70966. Up to 13917 conditions per place. [2024-06-20 16:28:42,010 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 118 selfloop transitions, 21 changer transitions 0/145 dead transitions. [2024-06-20 16:28:42,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 145 transitions, 1296 flow [2024-06-20 16:28:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 16:28:42,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-06-20 16:28:42,013 INFO L175 Difference]: Start difference. First operand has 85 places, 103 transitions, 862 flow. Second operand 8 states and 183 transitions. [2024-06-20 16:28:42,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 145 transitions, 1296 flow [2024-06-20 16:28:42,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 145 transitions, 1147 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:42,073 INFO L231 Difference]: Finished difference. Result has 89 places, 106 transitions, 827 flow [2024-06-20 16:28:42,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=827, PETRI_PLACES=89, PETRI_TRANSITIONS=106} [2024-06-20 16:28:42,074 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 35 predicate places. [2024-06-20 16:28:42,074 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 106 transitions, 827 flow [2024-06-20 16:28:42,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:42,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:42,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:42,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:28:42,075 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:42,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1350681795, now seen corresponding path program 1 times [2024-06-20 16:28:42,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:42,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383103806] [2024-06-20 16:28:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:42,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:43,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383103806] [2024-06-20 16:28:43,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383103806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:43,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:43,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:28:43,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672048243] [2024-06-20 16:28:43,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:43,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:28:43,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:28:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:28:43,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:43,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:43,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:43,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:43,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:44,584 INFO L124 PetriNetUnfolderBase]: 10278/14660 cut-off events. [2024-06-20 16:28:44,584 INFO L125 PetriNetUnfolderBase]: For 144046/144046 co-relation queries the response was YES. [2024-06-20 16:28:44,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70644 conditions, 14660 events. 10278/14660 cut-off events. For 144046/144046 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 81905 event pairs, 4511 based on Foata normal form. 4/14661 useless extension candidates. Maximal degree in co-relation 70613. Up to 13956 conditions per place. [2024-06-20 16:28:44,697 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 109 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-20 16:28:44,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 1149 flow [2024-06-20 16:28:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:28:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:28:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-20 16:28:44,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2024-06-20 16:28:44,699 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 827 flow. Second operand 5 states and 114 transitions. [2024-06-20 16:28:44,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 1149 flow [2024-06-20 16:28:44,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1065 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:28:44,751 INFO L231 Difference]: Finished difference. Result has 88 places, 110 transitions, 826 flow [2024-06-20 16:28:44,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=826, PETRI_PLACES=88, PETRI_TRANSITIONS=110} [2024-06-20 16:28:44,752 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 34 predicate places. [2024-06-20 16:28:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 110 transitions, 826 flow [2024-06-20 16:28:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:44,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:44,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:44,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:28:44,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:28:44,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:44,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1107560413, now seen corresponding path program 1 times [2024-06-20 16:28:44,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:44,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773227664] [2024-06-20 16:28:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:44,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:45,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:45,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773227664] [2024-06-20 16:28:45,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773227664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:45,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113316952] [2024-06-20 16:28:45,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:45,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:46,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:28:46,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 826 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:46,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:46,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:28:46,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:47,777 INFO L124 PetriNetUnfolderBase]: 11600/15970 cut-off events. [2024-06-20 16:28:47,778 INFO L125 PetriNetUnfolderBase]: For 196704/196704 co-relation queries the response was YES. [2024-06-20 16:28:47,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84387 conditions, 15970 events. 11600/15970 cut-off events. For 196704/196704 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 86718 event pairs, 5068 based on Foata normal form. 3/15970 useless extension candidates. Maximal degree in co-relation 84355. Up to 15613 conditions per place. [2024-06-20 16:28:47,897 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 120 selfloop transitions, 25 changer transitions 0/152 dead transitions. [2024-06-20 16:28:47,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 1285 flow [2024-06-20 16:28:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:28:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:28:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:28:47,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-20 16:28:47,899 INFO L175 Difference]: Start difference. First operand has 88 places, 110 transitions, 826 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:28:47,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 1285 flow [2024-06-20 16:28:47,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 152 transitions, 1232 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:47,948 INFO L231 Difference]: Finished difference. Result has 92 places, 114 transitions, 916 flow [2024-06-20 16:28:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=916, PETRI_PLACES=92, PETRI_TRANSITIONS=114} [2024-06-20 16:28:47,949 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-20 16:28:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 114 transitions, 916 flow [2024-06-20 16:28:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:28:47,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:47,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:28:47,950 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)] === [2024-06-20 16:28:47,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1103831671, now seen corresponding path program 1 times [2024-06-20 16:28:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:47,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579481505] [2024-06-20 16:28:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:49,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:49,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579481505] [2024-06-20 16:28:49,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579481505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:49,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:49,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829226364] [2024-06-20 16:28:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:49,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:28:49,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 114 transitions, 916 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:49,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:49,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:28:49,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:51,026 INFO L124 PetriNetUnfolderBase]: 11913/16340 cut-off events. [2024-06-20 16:28:51,026 INFO L125 PetriNetUnfolderBase]: For 208799/208799 co-relation queries the response was YES. [2024-06-20 16:28:51,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85181 conditions, 16340 events. 11913/16340 cut-off events. For 208799/208799 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 86458 event pairs, 4954 based on Foata normal form. 9/16346 useless extension candidates. Maximal degree in co-relation 85148. Up to 15784 conditions per place. [2024-06-20 16:28:51,169 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 121 selfloop transitions, 48 changer transitions 0/174 dead transitions. [2024-06-20 16:28:51,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 174 transitions, 1522 flow [2024-06-20 16:28:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:51,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 16:28:51,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-20 16:28:51,172 INFO L175 Difference]: Start difference. First operand has 92 places, 114 transitions, 916 flow. Second operand 8 states and 187 transitions. [2024-06-20 16:28:51,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 174 transitions, 1522 flow [2024-06-20 16:28:51,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 174 transitions, 1372 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 16:28:51,281 INFO L231 Difference]: Finished difference. Result has 96 places, 129 transitions, 1042 flow [2024-06-20 16:28:51,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1042, PETRI_PLACES=96, PETRI_TRANSITIONS=129} [2024-06-20 16:28:51,282 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-20 16:28:51,282 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 129 transitions, 1042 flow [2024-06-20 16:28:51,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:51,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:51,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:28:51,283 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)] === [2024-06-20 16:28:51,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1710795505, now seen corresponding path program 2 times [2024-06-20 16:28:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:51,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841000829] [2024-06-20 16:28:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:51,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:52,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841000829] [2024-06-20 16:28:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841000829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:52,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:52,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140737533] [2024-06-20 16:28:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:52,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:28:52,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 129 transitions, 1042 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:52,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:52,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:28:52,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:54,406 INFO L124 PetriNetUnfolderBase]: 12045/16527 cut-off events. [2024-06-20 16:28:54,406 INFO L125 PetriNetUnfolderBase]: For 229030/229048 co-relation queries the response was YES. [2024-06-20 16:28:54,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88079 conditions, 16527 events. 12045/16527 cut-off events. For 229030/229048 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 87356 event pairs, 4981 based on Foata normal form. 19/16537 useless extension candidates. Maximal degree in co-relation 88044. Up to 15807 conditions per place. [2024-06-20 16:28:54,551 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 115 selfloop transitions, 68 changer transitions 0/188 dead transitions. [2024-06-20 16:28:54,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 188 transitions, 1664 flow [2024-06-20 16:28:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:28:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:28:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 16:28:54,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2024-06-20 16:28:54,564 INFO L175 Difference]: Start difference. First operand has 96 places, 129 transitions, 1042 flow. Second operand 8 states and 190 transitions. [2024-06-20 16:28:54,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 188 transitions, 1664 flow [2024-06-20 16:28:54,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 1590 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:28:54,670 INFO L231 Difference]: Finished difference. Result has 101 places, 145 transitions, 1279 flow [2024-06-20 16:28:54,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1279, PETRI_PLACES=101, PETRI_TRANSITIONS=145} [2024-06-20 16:28:54,670 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2024-06-20 16:28:54,671 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 145 transitions, 1279 flow [2024-06-20 16:28:54,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:54,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:54,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:28:54,671 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)] === [2024-06-20 16:28:54,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1711004755, now seen corresponding path program 3 times [2024-06-20 16:28:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:54,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913345506] [2024-06-20 16:28:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:55,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913345506] [2024-06-20 16:28:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913345506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:55,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:55,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:55,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060093140] [2024-06-20 16:28:55,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:55,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:55,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:55,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:55,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:28:55,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 145 transitions, 1279 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:55,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:55,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:28:55,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:28:57,743 INFO L124 PetriNetUnfolderBase]: 12067/16559 cut-off events. [2024-06-20 16:28:57,743 INFO L125 PetriNetUnfolderBase]: For 249979/249991 co-relation queries the response was YES. [2024-06-20 16:28:57,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90749 conditions, 16559 events. 12067/16559 cut-off events. For 249979/249991 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 87617 event pairs, 4930 based on Foata normal form. 11/16561 useless extension candidates. Maximal degree in co-relation 90711. Up to 15665 conditions per place. [2024-06-20 16:28:57,889 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 106 selfloop transitions, 93 changer transitions 0/204 dead transitions. [2024-06-20 16:28:57,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 204 transitions, 2051 flow [2024-06-20 16:28:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:28:57,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:28:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 16:28:57,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466230936819172 [2024-06-20 16:28:57,891 INFO L175 Difference]: Start difference. First operand has 101 places, 145 transitions, 1279 flow. Second operand 9 states and 205 transitions. [2024-06-20 16:28:57,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 204 transitions, 2051 flow [2024-06-20 16:28:58,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 204 transitions, 1945 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 16:28:58,029 INFO L231 Difference]: Finished difference. Result has 108 places, 156 transitions, 1505 flow [2024-06-20 16:28:58,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1505, PETRI_PLACES=108, PETRI_TRANSITIONS=156} [2024-06-20 16:28:58,029 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-20 16:28:58,029 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 156 transitions, 1505 flow [2024-06-20 16:28:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:58,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:28:58,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:28:58,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:28:58,030 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)] === [2024-06-20 16:28:58,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:28:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash 844332301, now seen corresponding path program 4 times [2024-06-20 16:28:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:28:58,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034639641] [2024-06-20 16:28:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:28:58,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:28:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:28:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:28:59,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:28:59,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034639641] [2024-06-20 16:28:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034639641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:28:59,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:28:59,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:28:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964995303] [2024-06-20 16:28:59,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:28:59,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:28:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:28:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:28:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:28:59,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:28:59,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 156 transitions, 1505 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:28:59,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:28:59,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:28:59,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:01,198 INFO L124 PetriNetUnfolderBase]: 12028/16503 cut-off events. [2024-06-20 16:29:01,199 INFO L125 PetriNetUnfolderBase]: For 267394/267412 co-relation queries the response was YES. [2024-06-20 16:29:01,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91930 conditions, 16503 events. 12028/16503 cut-off events. For 267394/267412 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 87162 event pairs, 4957 based on Foata normal form. 19/16513 useless extension candidates. Maximal degree in co-relation 91889. Up to 15783 conditions per place. [2024-06-20 16:29:01,348 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 120 selfloop transitions, 75 changer transitions 0/200 dead transitions. [2024-06-20 16:29:01,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 200 transitions, 2030 flow [2024-06-20 16:29:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 16:29:01,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632352941176471 [2024-06-20 16:29:01,350 INFO L175 Difference]: Start difference. First operand has 108 places, 156 transitions, 1505 flow. Second operand 8 states and 189 transitions. [2024-06-20 16:29:01,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 200 transitions, 2030 flow [2024-06-20 16:29:01,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1854 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-20 16:29:01,604 INFO L231 Difference]: Finished difference. Result has 114 places, 156 transitions, 1492 flow [2024-06-20 16:29:01,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=114, PETRI_TRANSITIONS=156} [2024-06-20 16:29:01,604 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-20 16:29:01,604 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 156 transitions, 1492 flow [2024-06-20 16:29:01,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-20 16:29:01,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:01,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:01,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:29:01,605 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)] === [2024-06-20 16:29:01,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:01,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1314274771, now seen corresponding path program 1 times [2024-06-20 16:29:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:01,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891831620] [2024-06-20 16:29:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:01,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:02,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891831620] [2024-06-20 16:29:02,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891831620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:02,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:02,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:02,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895569917] [2024-06-20 16:29:02,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:02,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:02,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:02,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:02,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:02,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:29:02,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 156 transitions, 1492 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:02,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:02,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:29:02,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:05,057 INFO L124 PetriNetUnfolderBase]: 11671/16185 cut-off events. [2024-06-20 16:29:05,057 INFO L125 PetriNetUnfolderBase]: For 291022/291122 co-relation queries the response was YES. [2024-06-20 16:29:05,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92224 conditions, 16185 events. 11671/16185 cut-off events. For 291022/291122 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 88329 event pairs, 4779 based on Foata normal form. 30/16212 useless extension candidates. Maximal degree in co-relation 92181. Up to 15674 conditions per place. [2024-06-20 16:29:05,170 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 181 selfloop transitions, 44 changer transitions 0/234 dead transitions. [2024-06-20 16:29:05,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 234 transitions, 2396 flow [2024-06-20 16:29:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:05,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 16:29:05,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-20 16:29:05,188 INFO L175 Difference]: Start difference. First operand has 114 places, 156 transitions, 1492 flow. Second operand 9 states and 216 transitions. [2024-06-20 16:29:05,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 234 transitions, 2396 flow [2024-06-20 16:29:05,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 234 transitions, 2128 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:29:05,345 INFO L231 Difference]: Finished difference. Result has 118 places, 183 transitions, 1687 flow [2024-06-20 16:29:05,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1687, PETRI_PLACES=118, PETRI_TRANSITIONS=183} [2024-06-20 16:29:05,345 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-20 16:29:05,345 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 183 transitions, 1687 flow [2024-06-20 16:29:05,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:05,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:05,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:29:05,346 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)] === [2024-06-20 16:29:05,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash 22624881, now seen corresponding path program 2 times [2024-06-20 16:29:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:05,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752779016] [2024-06-20 16:29:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:05,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:06,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:06,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752779016] [2024-06-20 16:29:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752779016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125718875] [2024-06-20 16:29:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:06,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:06,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:29:06,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 183 transitions, 1687 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:06,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:06,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:29:06,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:08,721 INFO L124 PetriNetUnfolderBase]: 11744/16314 cut-off events. [2024-06-20 16:29:08,721 INFO L125 PetriNetUnfolderBase]: For 326727/326789 co-relation queries the response was YES. [2024-06-20 16:29:08,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96244 conditions, 16314 events. 11744/16314 cut-off events. For 326727/326789 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 89250 event pairs, 3934 based on Foata normal form. 30/16341 useless extension candidates. Maximal degree in co-relation 96197. Up to 15688 conditions per place. [2024-06-20 16:29:08,850 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 175 selfloop transitions, 48 changer transitions 0/232 dead transitions. [2024-06-20 16:29:08,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 2358 flow [2024-06-20 16:29:08,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 16:29:08,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2024-06-20 16:29:08,852 INFO L175 Difference]: Start difference. First operand has 118 places, 183 transitions, 1687 flow. Second operand 8 states and 190 transitions. [2024-06-20 16:29:08,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 2358 flow [2024-06-20 16:29:09,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 232 transitions, 2255 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:09,043 INFO L231 Difference]: Finished difference. Result has 123 places, 186 transitions, 1772 flow [2024-06-20 16:29:09,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1772, PETRI_PLACES=123, PETRI_TRANSITIONS=186} [2024-06-20 16:29:09,043 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-06-20 16:29:09,044 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 186 transitions, 1772 flow [2024-06-20 16:29:09,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:09,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:09,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:09,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:29:09,044 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:09,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 466440235, now seen corresponding path program 3 times [2024-06-20 16:29:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:09,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996696698] [2024-06-20 16:29:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:10,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996696698] [2024-06-20 16:29:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996696698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:10,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:10,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:10,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850399540] [2024-06-20 16:29:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:10,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:10,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:10,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:29:10,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 186 transitions, 1772 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:10,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:10,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:29:10,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:12,798 INFO L124 PetriNetUnfolderBase]: 11808/16391 cut-off events. [2024-06-20 16:29:12,798 INFO L125 PetriNetUnfolderBase]: For 372037/372099 co-relation queries the response was YES. [2024-06-20 16:29:12,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100084 conditions, 16391 events. 11808/16391 cut-off events. For 372037/372099 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 89582 event pairs, 4461 based on Foata normal form. 36/16419 useless extension candidates. Maximal degree in co-relation 100036. Up to 15784 conditions per place. [2024-06-20 16:29:12,956 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 173 selfloop transitions, 53 changer transitions 0/235 dead transitions. [2024-06-20 16:29:12,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 235 transitions, 2457 flow [2024-06-20 16:29:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 16:29:12,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681372549019608 [2024-06-20 16:29:12,958 INFO L175 Difference]: Start difference. First operand has 123 places, 186 transitions, 1772 flow. Second operand 8 states and 191 transitions. [2024-06-20 16:29:12,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 235 transitions, 2457 flow [2024-06-20 16:29:13,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 2291 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:13,237 INFO L231 Difference]: Finished difference. Result has 125 places, 189 transitions, 1809 flow [2024-06-20 16:29:13,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1809, PETRI_PLACES=125, PETRI_TRANSITIONS=189} [2024-06-20 16:29:13,238 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2024-06-20 16:29:13,238 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 189 transitions, 1809 flow [2024-06-20 16:29:13,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:13,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:13,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:13,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:29:13,239 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)] === [2024-06-20 16:29:13,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 140773011, now seen corresponding path program 4 times [2024-06-20 16:29:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887613293] [2024-06-20 16:29:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:14,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:14,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887613293] [2024-06-20 16:29:14,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887613293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:14,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:14,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691887103] [2024-06-20 16:29:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:14,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:14,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:14,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:14,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:29:14,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 189 transitions, 1809 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:14,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:14,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:29:14,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:16,747 INFO L124 PetriNetUnfolderBase]: 12036/16760 cut-off events. [2024-06-20 16:29:16,747 INFO L125 PetriNetUnfolderBase]: For 385818/385876 co-relation queries the response was YES. [2024-06-20 16:29:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102220 conditions, 16760 events. 12036/16760 cut-off events. For 385818/385876 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 92358 event pairs, 4496 based on Foata normal form. 100/16857 useless extension candidates. Maximal degree in co-relation 102171. Up to 15774 conditions per place. [2024-06-20 16:29:16,931 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 159 selfloop transitions, 70 changer transitions 0/238 dead transitions. [2024-06-20 16:29:16,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 238 transitions, 2497 flow [2024-06-20 16:29:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 16:29:16,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48284313725490197 [2024-06-20 16:29:16,933 INFO L175 Difference]: Start difference. First operand has 125 places, 189 transitions, 1809 flow. Second operand 8 states and 197 transitions. [2024-06-20 16:29:16,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 238 transitions, 2497 flow [2024-06-20 16:29:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 238 transitions, 2332 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:17,240 INFO L231 Difference]: Finished difference. Result has 127 places, 192 transitions, 1881 flow [2024-06-20 16:29:17,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1881, PETRI_PLACES=127, PETRI_TRANSITIONS=192} [2024-06-20 16:29:17,240 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-06-20 16:29:17,240 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 192 transitions, 1881 flow [2024-06-20 16:29:17,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:17,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:17,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:29:17,241 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)] === [2024-06-20 16:29:17,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash 140957709, now seen corresponding path program 1 times [2024-06-20 16:29:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93678541] [2024-06-20 16:29:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93678541] [2024-06-20 16:29:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93678541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:18,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612595459] [2024-06-20 16:29:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:18,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:18,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:29:18,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 192 transitions, 1881 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:18,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:18,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:29:18,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:21,551 INFO L124 PetriNetUnfolderBase]: 12668/17445 cut-off events. [2024-06-20 16:29:21,551 INFO L125 PetriNetUnfolderBase]: For 417817/417833 co-relation queries the response was YES. [2024-06-20 16:29:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107195 conditions, 17445 events. 12668/17445 cut-off events. For 417817/417833 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93129 event pairs, 4717 based on Foata normal form. 22/17459 useless extension candidates. Maximal degree in co-relation 107145. Up to 17099 conditions per place. [2024-06-20 16:29:21,715 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 216 selfloop transitions, 29 changer transitions 0/250 dead transitions. [2024-06-20 16:29:21,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 250 transitions, 2654 flow [2024-06-20 16:29:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 16:29:21,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357298474945534 [2024-06-20 16:29:21,721 INFO L175 Difference]: Start difference. First operand has 127 places, 192 transitions, 1881 flow. Second operand 9 states and 200 transitions. [2024-06-20 16:29:21,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 250 transitions, 2654 flow [2024-06-20 16:29:22,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 250 transitions, 2459 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:29:22,176 INFO L231 Difference]: Finished difference. Result has 132 places, 200 transitions, 1895 flow [2024-06-20 16:29:22,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1895, PETRI_PLACES=132, PETRI_TRANSITIONS=200} [2024-06-20 16:29:22,177 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 78 predicate places. [2024-06-20 16:29:22,177 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 200 transitions, 1895 flow [2024-06-20 16:29:22,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:22,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:22,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:22,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:29:22,177 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:22,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1735151092, now seen corresponding path program 1 times [2024-06-20 16:29:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:22,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889337011] [2024-06-20 16:29:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:23,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889337011] [2024-06-20 16:29:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889337011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:23,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:23,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202300356] [2024-06-20 16:29:23,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:23,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:23,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:23,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:29:23,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 200 transitions, 1895 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:23,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:23,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:29:23,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:25,537 INFO L124 PetriNetUnfolderBase]: 12700/17466 cut-off events. [2024-06-20 16:29:25,537 INFO L125 PetriNetUnfolderBase]: For 449636/449652 co-relation queries the response was YES. [2024-06-20 16:29:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109215 conditions, 17466 events. 12700/17466 cut-off events. For 449636/449652 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 92764 event pairs, 4681 based on Foata normal form. 20/17480 useless extension candidates. Maximal degree in co-relation 109162. Up to 17154 conditions per place. [2024-06-20 16:29:25,683 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 208 selfloop transitions, 25 changer transitions 0/238 dead transitions. [2024-06-20 16:29:25,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 238 transitions, 2676 flow [2024-06-20 16:29:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:29:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:29:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 16:29:25,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2024-06-20 16:29:25,684 INFO L175 Difference]: Start difference. First operand has 132 places, 200 transitions, 1895 flow. Second operand 6 states and 140 transitions. [2024-06-20 16:29:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 238 transitions, 2676 flow [2024-06-20 16:29:26,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 238 transitions, 2561 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:26,195 INFO L231 Difference]: Finished difference. Result has 133 places, 208 transitions, 1976 flow [2024-06-20 16:29:26,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1976, PETRI_PLACES=133, PETRI_TRANSITIONS=208} [2024-06-20 16:29:26,196 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-20 16:29:26,196 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 208 transitions, 1976 flow [2024-06-20 16:29:26,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:26,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:26,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:26,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:29:26,198 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:26,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash 412772907, now seen corresponding path program 2 times [2024-06-20 16:29:26,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694843714] [2024-06-20 16:29:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:26,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:27,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:27,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694843714] [2024-06-20 16:29:27,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694843714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:27,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831886688] [2024-06-20 16:29:27,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:27,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:27,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:27,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:27,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:29:27,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 208 transitions, 1976 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:27,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:27,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:29:27,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:30,511 INFO L124 PetriNetUnfolderBase]: 12736/17523 cut-off events. [2024-06-20 16:29:30,511 INFO L125 PetriNetUnfolderBase]: For 490449/490493 co-relation queries the response was YES. [2024-06-20 16:29:30,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113113 conditions, 17523 events. 12736/17523 cut-off events. For 490449/490493 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 93166 event pairs, 4709 based on Foata normal form. 38/17554 useless extension candidates. Maximal degree in co-relation 113059. Up to 17050 conditions per place. [2024-06-20 16:29:30,649 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 207 selfloop transitions, 63 changer transitions 0/275 dead transitions. [2024-06-20 16:29:30,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 275 transitions, 2842 flow [2024-06-20 16:29:30,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:29:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:29:30,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-20 16:29:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2024-06-20 16:29:30,668 INFO L175 Difference]: Start difference. First operand has 133 places, 208 transitions, 1976 flow. Second operand 10 states and 222 transitions. [2024-06-20 16:29:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 275 transitions, 2842 flow [2024-06-20 16:29:30,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 275 transitions, 2772 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 16:29:30,989 INFO L231 Difference]: Finished difference. Result has 144 places, 220 transitions, 2245 flow [2024-06-20 16:29:30,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1906, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2245, PETRI_PLACES=144, PETRI_TRANSITIONS=220} [2024-06-20 16:29:30,990 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2024-06-20 16:29:30,990 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 220 transitions, 2245 flow [2024-06-20 16:29:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:30,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:30,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:30,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:29:30,991 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:30,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash 413069577, now seen corresponding path program 3 times [2024-06-20 16:29:30,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:30,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61413718] [2024-06-20 16:29:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:30,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:32,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61413718] [2024-06-20 16:29:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61413718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:32,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869216647] [2024-06-20 16:29:32,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:32,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:32,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:32,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:29:32,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 220 transitions, 2245 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:32,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:32,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:29:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:35,283 INFO L124 PetriNetUnfolderBase]: 12772/17599 cut-off events. [2024-06-20 16:29:35,283 INFO L125 PetriNetUnfolderBase]: For 533563/533607 co-relation queries the response was YES. [2024-06-20 16:29:35,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117034 conditions, 17599 events. 12772/17599 cut-off events. For 533563/533607 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93803 event pairs, 4495 based on Foata normal form. 38/17630 useless extension candidates. Maximal degree in co-relation 116975. Up to 16965 conditions per place. [2024-06-20 16:29:35,477 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 200 selfloop transitions, 73 changer transitions 0/278 dead transitions. [2024-06-20 16:29:35,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 278 transitions, 3280 flow [2024-06-20 16:29:35,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-20 16:29:35,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4466230936819172 [2024-06-20 16:29:35,479 INFO L175 Difference]: Start difference. First operand has 144 places, 220 transitions, 2245 flow. Second operand 9 states and 205 transitions. [2024-06-20 16:29:35,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 278 transitions, 3280 flow [2024-06-20 16:29:35,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 278 transitions, 3140 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 16:29:35,912 INFO L231 Difference]: Finished difference. Result has 150 places, 226 transitions, 2447 flow [2024-06-20 16:29:35,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2447, PETRI_PLACES=150, PETRI_TRANSITIONS=226} [2024-06-20 16:29:35,914 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2024-06-20 16:29:35,914 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 226 transitions, 2447 flow [2024-06-20 16:29:35,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:35,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:35,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:35,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:29:35,915 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:35,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 176412849, now seen corresponding path program 5 times [2024-06-20 16:29:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:35,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088442083] [2024-06-20 16:29:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:37,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:37,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088442083] [2024-06-20 16:29:37,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088442083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:37,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:37,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:37,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448966312] [2024-06-20 16:29:37,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:37,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:37,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:37,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-20 16:29:37,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 226 transitions, 2447 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:37,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:37,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-20 16:29:37,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:40,163 INFO L124 PetriNetUnfolderBase]: 12168/16966 cut-off events. [2024-06-20 16:29:40,164 INFO L125 PetriNetUnfolderBase]: For 583500/583554 co-relation queries the response was YES. [2024-06-20 16:29:40,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117886 conditions, 16966 events. 12168/16966 cut-off events. For 583500/583554 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 93617 event pairs, 4475 based on Foata normal form. 35/16952 useless extension candidates. Maximal degree in co-relation 117826. Up to 16128 conditions per place. [2024-06-20 16:29:40,319 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 167 selfloop transitions, 91 changer transitions 0/269 dead transitions. [2024-06-20 16:29:40,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 269 transitions, 3187 flow [2024-06-20 16:29:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:29:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:29:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 16:29:40,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46568627450980393 [2024-06-20 16:29:40,321 INFO L175 Difference]: Start difference. First operand has 150 places, 226 transitions, 2447 flow. Second operand 8 states and 190 transitions. [2024-06-20 16:29:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 269 transitions, 3187 flow [2024-06-20 16:29:40,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 269 transitions, 3022 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:40,757 INFO L231 Difference]: Finished difference. Result has 153 places, 229 transitions, 2580 flow [2024-06-20 16:29:40,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2580, PETRI_PLACES=153, PETRI_TRANSITIONS=229} [2024-06-20 16:29:40,757 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 99 predicate places. [2024-06-20 16:29:40,758 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 229 transitions, 2580 flow [2024-06-20 16:29:40,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:40,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:40,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:40,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:29:40,758 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)] === [2024-06-20 16:29:40,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash 176597547, now seen corresponding path program 4 times [2024-06-20 16:29:40,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:40,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89057471] [2024-06-20 16:29:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:40,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:42,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:42,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89057471] [2024-06-20 16:29:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89057471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:42,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:42,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:29:42,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599928766] [2024-06-20 16:29:42,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:42,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:29:42,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:42,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:29:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:29:42,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:29:42,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 229 transitions, 2580 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:42,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:42,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:29:42,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:29:45,197 INFO L124 PetriNetUnfolderBase]: 12891/17787 cut-off events. [2024-06-20 16:29:45,198 INFO L125 PetriNetUnfolderBase]: For 641993/642031 co-relation queries the response was YES. [2024-06-20 16:29:45,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123853 conditions, 17787 events. 12891/17787 cut-off events. For 641993/642031 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 95178 event pairs, 4718 based on Foata normal form. 59/17827 useless extension candidates. Maximal degree in co-relation 123791. Up to 16702 conditions per place. [2024-06-20 16:29:45,359 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 179 selfloop transitions, 100 changer transitions 0/284 dead transitions. [2024-06-20 16:29:45,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 284 transitions, 3394 flow [2024-06-20 16:29:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:29:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:29:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 16:29:45,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684095860566449 [2024-06-20 16:29:45,361 INFO L175 Difference]: Start difference. First operand has 153 places, 229 transitions, 2580 flow. Second operand 9 states and 215 transitions. [2024-06-20 16:29:45,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 284 transitions, 3394 flow [2024-06-20 16:29:45,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 284 transitions, 3084 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-20 16:29:45,902 INFO L231 Difference]: Finished difference. Result has 157 places, 231 transitions, 2568 flow [2024-06-20 16:29:45,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2568, PETRI_PLACES=157, PETRI_TRANSITIONS=231} [2024-06-20 16:29:45,902 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-06-20 16:29:45,902 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 231 transitions, 2568 flow [2024-06-20 16:29:45,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:45,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:29:45,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:29:45,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:29:45,903 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:29:45,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:29:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -925033828, now seen corresponding path program 2 times [2024-06-20 16:29:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:29:45,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163901614] [2024-06-20 16:29:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:29:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:29:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:29:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:29:46,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:29:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163901614] [2024-06-20 16:29:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163901614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:29:46,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:29:46,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:29:46,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961214141] [2024-06-20 16:29:46,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:29:46,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:29:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:29:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:29:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:29:47,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 51 [2024-06-20 16:29:47,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 231 transitions, 2568 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:29:47,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:29:47,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 51 [2024-06-20 16:29:47,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand