./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix026_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix026_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:58:34,005 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:58:34,052 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:58:34,055 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:58:34,055 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:58:34,070 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:58:34,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:58:34,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:58:34,071 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:58:34,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:58:34,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:58:34,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:58:34,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:58:34,072 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:58:34,073 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:58:34,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:58:34,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:58:34,074 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:58:34,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:58:34,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:58:34,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:58:34,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:58:34,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:58:34,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:58:34,076 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:58:34,076 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:58:34,076 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:58:34,077 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:58:34,077 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:58:34,077 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:58:34,078 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:58:34,078 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:58:34,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:58:34,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:58:34,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:58:34,079 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:58:34,079 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:58:34,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:58:34,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:58:34,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:58:34,080 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:58:34,081 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:58:34,081 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:58:34,081 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:58:34,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:58:34,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:58:34,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:58:34,321 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:58:34,321 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:58:34,322 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i [2024-06-04 14:58:35,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:58:35,600 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:58:35,601 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix026_pso.opt_rmo.opt.i [2024-06-04 14:58:35,611 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1533cfd9d/8171914eb9164efb944f85cfe50b4e15/FLAG404552ae9 [2024-06-04 14:58:35,630 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1533cfd9d/8171914eb9164efb944f85cfe50b4e15 [2024-06-04 14:58:35,631 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:58:35,632 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:58:35,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix026_pso.opt_rmo.opt.yml/witness.yml [2024-06-04 14:58:35,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:58:35,766 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:58:35,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:58:35,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:58:35,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:58:35,771 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:58:35" (1/2) ... [2024-06-04 14:58:35,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4fc5aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:58:35, skipping insertion in model container [2024-06-04 14:58:35,772 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:58:35" (1/2) ... [2024-06-04 14:58:35,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68a5dc42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:58:35, skipping insertion in model container [2024-06-04 14:58:35,774 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:58:35" (2/2) ... [2024-06-04 14:58:35,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4fc5aa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:35, skipping insertion in model container [2024-06-04 14:58:35,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:58:35" (2/2) ... [2024-06-04 14:58:35,776 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:58:35,870 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:58:35,871 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:58:35,872 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:58:35,872 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:58:35,872 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-04 14:58:35,872 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:58:35,873 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-04 14:58:35,901 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:58:36,218 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:58:36,225 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:58:36,332 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:58:36,367 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:58:36,367 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36 WrapperNode [2024-06-04 14:58:36,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:58:36,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:58:36,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:58:36,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:58:36,373 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 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,399 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 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,423 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-04 14:58:36,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:58:36,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:58:36,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:58:36,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:58:36,432 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,437 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,452 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:58:36,456 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,456 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,468 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:58:36,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:58:36,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:58:36,491 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:58:36,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (1/1) ... [2024-06-04 14:58:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:58:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:58:36,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 14:58:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 14:58:36,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:58:36,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:58:36,544 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:58:36,544 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:58:36,544 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:58:36,545 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:58:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:58:36,545 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:58:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 14:58:36,545 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 14:58:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:58:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:58:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:58:36,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:58:36,547 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:58:36,661 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:58:36,663 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:58:36,974 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:58:36,974 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:58:37,153 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:58:37,153 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:58:37,154 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:58:37 BoogieIcfgContainer [2024-06-04 14:58:37,154 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:58:37,156 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:58:37,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:58:37,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:58:37,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:58:35" (1/4) ... [2024-06-04 14:58:37,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f569ee4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:58:37, skipping insertion in model container [2024-06-04 14:58:37,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:58:35" (2/4) ... [2024-06-04 14:58:37,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f569ee4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:58:37, skipping insertion in model container [2024-06-04 14:58:37,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:58:36" (3/4) ... [2024-06-04 14:58:37,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f569ee4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:58:37, skipping insertion in model container [2024-06-04 14:58:37,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:58:37" (4/4) ... [2024-06-04 14:58:37,160 INFO L112 eAbstractionObserver]: Analyzing ICFG mix026_pso.opt_rmo.opt.i [2024-06-04 14:58:37,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:58:37,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 14:58:37,173 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:58:37,213 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:58:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 14:58:37,271 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-04 14:58:37,271 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:58:37,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 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. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:58:37,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-04 14:58:37,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-04 14:58:37,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:58:37,293 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;@5b2a2512, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:58:37,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 14:58:37,297 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:58:37,297 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:58:37,297 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:58:37,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:37,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:58:37,298 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)] === [2024-06-04 14:58:37,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:37,302 INFO L85 PathProgramCache]: Analyzing trace with hash -784119696, now seen corresponding path program 1 times [2024-06-04 14:58:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:37,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934502011] [2024-06-04 14:58:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:38,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:38,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934502011] [2024-06-04 14:58:38,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934502011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:38,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:38,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:58:38,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756508573] [2024-06-04 14:58:38,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:38,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:58:38,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:58:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:58:38,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-04 14:58:38,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:38,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:38,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-04 14:58:38,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:39,494 INFO L124 PetriNetUnfolderBase]: 6401/9226 cut-off events. [2024-06-04 14:58:39,494 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-06-04 14:58:39,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18298 conditions, 9226 events. 6401/9226 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 53320 event pairs, 4681 based on Foata normal form. 1/8909 useless extension candidates. Maximal degree in co-relation 18282. Up to 8763 conditions per place. [2024-06-04 14:58:39,545 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-04 14:58:39,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 231 flow [2024-06-04 14:58:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:58:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:58:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-06-04 14:58:39,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-06-04 14:58:39,557 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 100 transitions. [2024-06-04 14:58:39,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 231 flow [2024-06-04 14:58:39,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:39,564 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-04 14:58:39,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-04 14:58:39,569 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-04 14:58:39,570 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-04 14:58:39,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:39,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:39,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:39,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:58:39,571 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)] === [2024-06-04 14:58:39,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1919730545, now seen corresponding path program 1 times [2024-06-04 14:58:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:39,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744373016] [2024-06-04 14:58:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:39,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:40,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:40,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744373016] [2024-06-04 14:58:40,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744373016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:40,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:58:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781506045] [2024-06-04 14:58:40,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:40,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:58:40,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:58:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:58:40,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:58:40,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:40,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:40,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:58:40,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:41,466 INFO L124 PetriNetUnfolderBase]: 7489/10480 cut-off events. [2024-06-04 14:58:41,466 INFO L125 PetriNetUnfolderBase]: For 2089/2089 co-relation queries the response was YES. [2024-06-04 14:58:41,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23889 conditions, 10480 events. 7489/10480 cut-off events. For 2089/2089 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 58664 event pairs, 4729 based on Foata normal form. 4/10440 useless extension candidates. Maximal degree in co-relation 23874. Up to 10186 conditions per place. [2024-06-04 14:58:41,510 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-04 14:58:41,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-04 14:58:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:58:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:58:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-04 14:58:41,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-04 14:58:41,512 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-04 14:58:41,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-04 14:58:41,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:58:41,525 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-04 14:58:41,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-04 14:58:41,526 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-04 14:58:41,526 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-04 14:58:41,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:41,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:41,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:41,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:58:41,527 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)] === [2024-06-04 14:58:41,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:41,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1092545550, now seen corresponding path program 1 times [2024-06-04 14:58:41,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:41,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274540408] [2024-06-04 14:58:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:41,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:42,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:42,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274540408] [2024-06-04 14:58:42,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274540408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:42,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:42,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:58:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020584701] [2024-06-04 14:58:42,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:58:42,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:58:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:58:42,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:58:42,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:42,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:42,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:58:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:43,908 INFO L124 PetriNetUnfolderBase]: 9511/13195 cut-off events. [2024-06-04 14:58:43,908 INFO L125 PetriNetUnfolderBase]: For 7070/7070 co-relation queries the response was YES. [2024-06-04 14:58:43,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33310 conditions, 13195 events. 9511/13195 cut-off events. For 7070/7070 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72140 event pairs, 4705 based on Foata normal form. 8/13152 useless extension candidates. Maximal degree in co-relation 33293. Up to 12817 conditions per place. [2024-06-04 14:58:43,971 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-04 14:58:43,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 490 flow [2024-06-04 14:58:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:58:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:58:43,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-04 14:58:43,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-04 14:58:43,977 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 176 transitions. [2024-06-04 14:58:43,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 490 flow [2024-06-04 14:58:43,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 14:58:43,981 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-04 14:58:43,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-04 14:58:43,982 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-04 14:58:43,983 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-04 14:58:43,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:43,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:43,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:43,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:58:43,983 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:58:43,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 920881242, now seen corresponding path program 1 times [2024-06-04 14:58:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:43,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478186025] [2024-06-04 14:58:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:44,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:44,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478186025] [2024-06-04 14:58:44,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478186025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:44,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:44,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:58:44,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089208152] [2024-06-04 14:58:44,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:44,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:58:44,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:58:44,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:58:44,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:58:44,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:44,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:44,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:58:44,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:46,111 INFO L124 PetriNetUnfolderBase]: 8098/11568 cut-off events. [2024-06-04 14:58:46,111 INFO L125 PetriNetUnfolderBase]: For 11519/11519 co-relation queries the response was YES. [2024-06-04 14:58:46,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31941 conditions, 11568 events. 8098/11568 cut-off events. For 11519/11519 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 65544 event pairs, 4248 based on Foata normal form. 6/11382 useless extension candidates. Maximal degree in co-relation 31922. Up to 11002 conditions per place. [2024-06-04 14:58:46,163 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-04 14:58:46,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 453 flow [2024-06-04 14:58:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:58:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:58:46,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-04 14:58:46,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-04 14:58:46,165 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 133 transitions. [2024-06-04 14:58:46,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 453 flow [2024-06-04 14:58:46,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 415 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:58:46,169 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-04 14:58:46,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-04 14:58:46,171 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-04 14:58:46,171 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-04 14:58:46,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:46,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:46,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:46,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:58:46,172 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)] === [2024-06-04 14:58:46,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -134540783, now seen corresponding path program 1 times [2024-06-04 14:58:46,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:46,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498118966] [2024-06-04 14:58:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498118966] [2024-06-04 14:58:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498118966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:46,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:58:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122806945] [2024-06-04 14:58:46,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:46,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:58:46,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:58:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:58:47,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:58:47,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:47,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:47,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:58:47,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:48,582 INFO L124 PetriNetUnfolderBase]: 9537/13238 cut-off events. [2024-06-04 14:58:48,582 INFO L125 PetriNetUnfolderBase]: For 21090/21090 co-relation queries the response was YES. [2024-06-04 14:58:48,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40077 conditions, 13238 events. 9537/13238 cut-off events. For 21090/21090 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72171 event pairs, 4804 based on Foata normal form. 6/13194 useless extension candidates. Maximal degree in co-relation 40056. Up to 12809 conditions per place. [2024-06-04 14:58:48,641 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 74 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-04 14:58:48,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 102 transitions, 618 flow [2024-06-04 14:58:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:58:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:58:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 14:58:48,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-04 14:58:48,643 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 163 transitions. [2024-06-04 14:58:48,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 102 transitions, 618 flow [2024-06-04 14:58:48,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 102 transitions, 589 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 14:58:48,647 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-04 14:58:48,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-04 14:58:48,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-04 14:58:48,661 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-04 14:58:48,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:48,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:48,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:48,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:58:48,661 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)] === [2024-06-04 14:58:48,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:48,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1978376717, now seen corresponding path program 2 times [2024-06-04 14:58:48,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:48,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484655752] [2024-06-04 14:58:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:48,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484655752] [2024-06-04 14:58:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484655752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:49,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:49,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:58:49,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922490761] [2024-06-04 14:58:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:49,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:58:49,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:58:49,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:58:49,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:58:49,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:49,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:49,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:58:49,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:51,133 INFO L124 PetriNetUnfolderBase]: 9519/13218 cut-off events. [2024-06-04 14:58:51,133 INFO L125 PetriNetUnfolderBase]: For 31027/31034 co-relation queries the response was YES. [2024-06-04 14:58:51,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43322 conditions, 13218 events. 9519/13218 cut-off events. For 31027/31034 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 71994 event pairs, 4800 based on Foata normal form. 12/13181 useless extension candidates. Maximal degree in co-relation 43300. Up to 12794 conditions per place. [2024-06-04 14:58:51,193 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 67 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-04 14:58:51,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 596 flow [2024-06-04 14:58:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:58:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:58:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:58:51,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:58:51,195 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:58:51,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 596 flow [2024-06-04 14:58:51,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 95 transitions, 550 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:58:51,207 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-04 14:58:51,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-04 14:58:51,208 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-04 14:58:51,208 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-04 14:58:51,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:51,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:51,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:51,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:58:51,209 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)] === [2024-06-04 14:58:51,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:51,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1144579671, now seen corresponding path program 1 times [2024-06-04 14:58:51,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:51,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127365805] [2024-06-04 14:58:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:51,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:51,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127365805] [2024-06-04 14:58:51,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127365805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:51,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:51,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213850906] [2024-06-04 14:58:51,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:51,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:52,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:58:52,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:52,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:52,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:58:52,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:53,763 INFO L124 PetriNetUnfolderBase]: 9632/13394 cut-off events. [2024-06-04 14:58:53,764 INFO L125 PetriNetUnfolderBase]: For 35905/35909 co-relation queries the response was YES. [2024-06-04 14:58:53,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44410 conditions, 13394 events. 9632/13394 cut-off events. For 35905/35909 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73067 event pairs, 5048 based on Foata normal form. 10/13356 useless extension candidates. Maximal degree in co-relation 44386. Up to 12964 conditions per place. [2024-06-04 14:58:53,862 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 90 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-04 14:58:53,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 828 flow [2024-06-04 14:58:53,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:53,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-04 14:58:53,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:58:53,864 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 208 transitions. [2024-06-04 14:58:53,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 828 flow [2024-06-04 14:58:53,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 754 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:58:53,881 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-04 14:58:53,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-04 14:58:53,882 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-04 14:58:53,882 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-04 14:58:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:53,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:53,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:53,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:58:53,882 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)] === [2024-06-04 14:58:53,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash 294901805, now seen corresponding path program 2 times [2024-06-04 14:58:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060912787] [2024-06-04 14:58:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:53,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:54,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:54,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060912787] [2024-06-04 14:58:54,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060912787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:54,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:54,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:54,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76727756] [2024-06-04 14:58:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:54,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:54,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:54,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:54,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:54,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:58:54,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:54,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:58:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:56,418 INFO L124 PetriNetUnfolderBase]: 9676/13489 cut-off events. [2024-06-04 14:58:56,418 INFO L125 PetriNetUnfolderBase]: For 48832/48840 co-relation queries the response was YES. [2024-06-04 14:58:56,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48249 conditions, 13489 events. 9676/13489 cut-off events. For 48832/48840 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74056 event pairs, 4960 based on Foata normal form. 14/13449 useless extension candidates. Maximal degree in co-relation 48223. Up to 12986 conditions per place. [2024-06-04 14:58:56,508 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 90 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-04 14:58:56,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 933 flow [2024-06-04 14:58:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:58:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:58:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:58:56,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-04 14:58:56,510 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:58:56,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 933 flow [2024-06-04 14:58:56,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 131 transitions, 875 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 14:58:56,532 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-04 14:58:56,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-04 14:58:56,532 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-04 14:58:56,532 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-04 14:58:56,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:56,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:56,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:56,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:58:56,533 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)] === [2024-06-04 14:58:56,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:56,534 INFO L85 PathProgramCache]: Analyzing trace with hash 124204025, now seen corresponding path program 3 times [2024-06-04 14:58:56,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:56,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026294865] [2024-06-04 14:58:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:56,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:57,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:57,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026294865] [2024-06-04 14:58:57,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026294865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:57,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:57,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:57,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660323361] [2024-06-04 14:58:57,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:57,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:57,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:58:57,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:57,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:57,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:58:57,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:59,049 INFO L124 PetriNetUnfolderBase]: 9720/13562 cut-off events. [2024-06-04 14:58:59,050 INFO L125 PetriNetUnfolderBase]: For 63927/63929 co-relation queries the response was YES. [2024-06-04 14:58:59,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51909 conditions, 13562 events. 9720/13562 cut-off events. For 63927/63929 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74347 event pairs, 4518 based on Foata normal form. 6/13514 useless extension candidates. Maximal degree in co-relation 51882. Up to 12855 conditions per place. [2024-06-04 14:58:59,135 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 83 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-06-04 14:58:59,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 140 transitions, 1122 flow [2024-06-04 14:58:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:58:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:58:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 14:58:59,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-04 14:58:59,137 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 190 transitions. [2024-06-04 14:58:59,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 140 transitions, 1122 flow [2024-06-04 14:58:59,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 140 transitions, 1003 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:59,163 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-04 14:58:59,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-04 14:58:59,164 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-04 14:58:59,164 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-04 14:58:59,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:59,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:59,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:59,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:58:59,165 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)] === [2024-06-04 14:58:59,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1916898793, now seen corresponding path program 4 times [2024-06-04 14:58:59,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:59,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115134182] [2024-06-04 14:58:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:00,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:00,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115134182] [2024-06-04 14:59:00,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115134182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:00,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:00,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:59:00,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014349421] [2024-06-04 14:59:00,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:00,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:59:00,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:59:00,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:59:00,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:00,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:00,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:00,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:00,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:01,794 INFO L124 PetriNetUnfolderBase]: 9702/13540 cut-off events. [2024-06-04 14:59:01,794 INFO L125 PetriNetUnfolderBase]: For 65001/65006 co-relation queries the response was YES. [2024-06-04 14:59:01,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51774 conditions, 13540 events. 9702/13540 cut-off events. For 65001/65006 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74266 event pairs, 4526 based on Foata normal form. 6/13490 useless extension candidates. Maximal degree in co-relation 51746. Up to 12840 conditions per place. [2024-06-04 14:59:01,873 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 77 selfloop transitions, 50 changer transitions 0/134 dead transitions. [2024-06-04 14:59:01,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 1054 flow [2024-06-04 14:59:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:59:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:59:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 14:59:01,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-04 14:59:01,874 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 183 transitions. [2024-06-04 14:59:01,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 1054 flow [2024-06-04 14:59:01,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 971 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 14:59:01,902 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-04 14:59:01,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-04 14:59:01,903 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-04 14:59:01,903 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-04 14:59:01,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:01,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:01,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:01,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:59:01,904 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)] === [2024-06-04 14:59:01,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash 301581809, now seen corresponding path program 1 times [2024-06-04 14:59:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:01,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399203801] [2024-06-04 14:59:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:03,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:03,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399203801] [2024-06-04 14:59:03,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399203801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:03,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:03,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:59:03,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545785911] [2024-06-04 14:59:03,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:03,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:59:03,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:59:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:59:03,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:03,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:03,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:03,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:03,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:04,738 INFO L124 PetriNetUnfolderBase]: 8292/11735 cut-off events. [2024-06-04 14:59:04,738 INFO L125 PetriNetUnfolderBase]: For 63026/63028 co-relation queries the response was YES. [2024-06-04 14:59:04,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46133 conditions, 11735 events. 8292/11735 cut-off events. For 63026/63028 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 65245 event pairs, 3860 based on Foata normal form. 6/11599 useless extension candidates. Maximal degree in co-relation 46103. Up to 11239 conditions per place. [2024-06-04 14:59:04,798 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 114 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-04 14:59:04,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1151 flow [2024-06-04 14:59:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:59:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:59:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 14:59:04,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:59:04,800 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 182 transitions. [2024-06-04 14:59:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1151 flow [2024-06-04 14:59:04,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:04,832 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-04 14:59:04,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-04 14:59:04,833 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-04 14:59:04,833 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-04 14:59:04,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:04,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:04,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:04,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:59:04,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:04,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:04,834 INFO L85 PathProgramCache]: Analyzing trace with hash -336329912, now seen corresponding path program 1 times [2024-06-04 14:59:04,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:04,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18181832] [2024-06-04 14:59:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:05,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:05,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18181832] [2024-06-04 14:59:05,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18181832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:05,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:05,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:59:05,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535935925] [2024-06-04 14:59:05,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:05,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:59:05,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:05,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:59:05,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:59:05,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-04 14:59:05,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:05,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:05,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-04 14:59:05,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:06,767 INFO L124 PetriNetUnfolderBase]: 7764/11464 cut-off events. [2024-06-04 14:59:06,768 INFO L125 PetriNetUnfolderBase]: For 71777/71794 co-relation queries the response was YES. [2024-06-04 14:59:06,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47127 conditions, 11464 events. 7764/11464 cut-off events. For 71777/71794 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 68153 event pairs, 3930 based on Foata normal form. 17/11311 useless extension candidates. Maximal degree in co-relation 47095. Up to 10613 conditions per place. [2024-06-04 14:59:06,844 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-04 14:59:06,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1009 flow [2024-06-04 14:59:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:59:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:59:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 14:59:06,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-04 14:59:06,846 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 132 transitions. [2024-06-04 14:59:06,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1009 flow [2024-06-04 14:59:06,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:06,895 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-04 14:59:06,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-04 14:59:06,895 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-04 14:59:06,896 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-04 14:59:06,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:06,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:06,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:59:06,896 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)] === [2024-06-04 14:59:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1836290886, now seen corresponding path program 1 times [2024-06-04 14:59:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861100505] [2024-06-04 14:59:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:06,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861100505] [2024-06-04 14:59:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861100505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:07,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:59:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824283537] [2024-06-04 14:59:07,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:07,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:59:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:59:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:59:07,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:07,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:07,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:07,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:09,479 INFO L124 PetriNetUnfolderBase]: 9072/12924 cut-off events. [2024-06-04 14:59:09,480 INFO L125 PetriNetUnfolderBase]: For 98332/98349 co-relation queries the response was YES. [2024-06-04 14:59:09,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56737 conditions, 12924 events. 9072/12924 cut-off events. For 98332/98349 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73551 event pairs, 4678 based on Foata normal form. 18/12922 useless extension candidates. Maximal degree in co-relation 56704. Up to 12344 conditions per place. [2024-06-04 14:59:09,571 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 111 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-06-04 14:59:09,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 1200 flow [2024-06-04 14:59:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:59:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:59:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:59:09,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:59:09,573 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:59:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 1200 flow [2024-06-04 14:59:09,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 145 transitions, 1157 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-04 14:59:09,628 INFO L231 Difference]: Finished difference. Result has 93 places, 125 transitions, 875 flow [2024-06-04 14:59:09,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=875, PETRI_PLACES=93, PETRI_TRANSITIONS=125} [2024-06-04 14:59:09,629 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-04 14:59:09,629 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 125 transitions, 875 flow [2024-06-04 14:59:09,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:09,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:09,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:59:09,630 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)] === [2024-06-04 14:59:09,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2042536922, now seen corresponding path program 1 times [2024-06-04 14:59:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:09,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285269666] [2024-06-04 14:59:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:10,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285269666] [2024-06-04 14:59:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285269666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:10,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:10,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652143314] [2024-06-04 14:59:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:10,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:10,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:10,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 125 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:10,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:10,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:10,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:12,784 INFO L124 PetriNetUnfolderBase]: 10624/14865 cut-off events. [2024-06-04 14:59:12,785 INFO L125 PetriNetUnfolderBase]: For 142571/142677 co-relation queries the response was YES. [2024-06-04 14:59:12,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69955 conditions, 14865 events. 10624/14865 cut-off events. For 142571/142677 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 82861 event pairs, 4133 based on Foata normal form. 32/14812 useless extension candidates. Maximal degree in co-relation 69919. Up to 13725 conditions per place. [2024-06-04 14:59:12,888 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 41 changer transitions 0/194 dead transitions. [2024-06-04 14:59:12,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 194 transitions, 1621 flow [2024-06-04 14:59:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-04 14:59:12,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-04 14:59:12,890 INFO L175 Difference]: Start difference. First operand has 93 places, 125 transitions, 875 flow. Second operand 9 states and 240 transitions. [2024-06-04 14:59:12,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 194 transitions, 1621 flow [2024-06-04 14:59:12,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 194 transitions, 1585 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-04 14:59:12,964 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1018 flow [2024-06-04 14:59:12,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1018, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-04 14:59:12,965 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-04 14:59:12,965 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1018 flow [2024-06-04 14:59:12,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:12,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:12,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:12,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:59:12,966 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)] === [2024-06-04 14:59:12,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1017070856, now seen corresponding path program 2 times [2024-06-04 14:59:12,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:12,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079685395] [2024-06-04 14:59:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:12,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:13,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079685395] [2024-06-04 14:59:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079685395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:13,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018007551] [2024-06-04 14:59:13,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:14,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:14,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1018 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:14,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:14,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:14,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:15,841 INFO L124 PetriNetUnfolderBase]: 10555/14760 cut-off events. [2024-06-04 14:59:15,841 INFO L125 PetriNetUnfolderBase]: For 160127/160233 co-relation queries the response was YES. [2024-06-04 14:59:15,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71404 conditions, 14760 events. 10555/14760 cut-off events. For 160127/160233 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 81940 event pairs, 4857 based on Foata normal form. 38/14711 useless extension candidates. Maximal degree in co-relation 71365. Up to 13907 conditions per place. [2024-06-04 14:59:15,964 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 134 selfloop transitions, 36 changer transitions 0/180 dead transitions. [2024-06-04 14:59:15,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 180 transitions, 1538 flow [2024-06-04 14:59:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 14:59:15,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-04 14:59:15,966 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1018 flow. Second operand 8 states and 210 transitions. [2024-06-04 14:59:15,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 180 transitions, 1538 flow [2024-06-04 14:59:16,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 180 transitions, 1461 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:16,095 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1025 flow [2024-06-04 14:59:16,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1025, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-04 14:59:16,096 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-04 14:59:16,096 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1025 flow [2024-06-04 14:59:16,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:16,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:16,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:16,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:59:16,096 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)] === [2024-06-04 14:59:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash -2134282244, now seen corresponding path program 3 times [2024-06-04 14:59:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422656735] [2024-06-04 14:59:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422656735] [2024-06-04 14:59:17,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422656735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:17,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:17,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211981950] [2024-06-04 14:59:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:17,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:17,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1025 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:17,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:17,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:17,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:19,081 INFO L124 PetriNetUnfolderBase]: 10729/15003 cut-off events. [2024-06-04 14:59:19,081 INFO L125 PetriNetUnfolderBase]: For 176134/176236 co-relation queries the response was YES. [2024-06-04 14:59:19,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73664 conditions, 15003 events. 10729/15003 cut-off events. For 176134/176236 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 83478 event pairs, 4525 based on Foata normal form. 30/14932 useless extension candidates. Maximal degree in co-relation 73623. Up to 14007 conditions per place. [2024-06-04 14:59:19,203 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 114 selfloop transitions, 55 changer transitions 0/179 dead transitions. [2024-06-04 14:59:19,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 179 transitions, 1573 flow [2024-06-04 14:59:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-04 14:59:19,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-04 14:59:19,207 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1025 flow. Second operand 8 states and 214 transitions. [2024-06-04 14:59:19,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 179 transitions, 1573 flow [2024-06-04 14:59:19,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 1491 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:19,346 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1113 flow [2024-06-04 14:59:19,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1113, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-04 14:59:19,346 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-04 14:59:19,346 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1113 flow [2024-06-04 14:59:19,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:19,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:19,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:19,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:59:19,347 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)] === [2024-06-04 14:59:19,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:19,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2134097546, now seen corresponding path program 1 times [2024-06-04 14:59:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:19,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107494338] [2024-06-04 14:59:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:19,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107494338] [2024-06-04 14:59:20,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107494338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:20,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:20,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:20,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861298339] [2024-06-04 14:59:20,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:20,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:20,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:20,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1113 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:20,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:20,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:22,553 INFO L124 PetriNetUnfolderBase]: 10906/15247 cut-off events. [2024-06-04 14:59:22,553 INFO L125 PetriNetUnfolderBase]: For 199461/199569 co-relation queries the response was YES. [2024-06-04 14:59:22,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76792 conditions, 15247 events. 10906/15247 cut-off events. For 199461/199569 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 85049 event pairs, 4669 based on Foata normal form. 14/15145 useless extension candidates. Maximal degree in co-relation 76750. Up to 14606 conditions per place. [2024-06-04 14:59:22,711 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 138 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-04 14:59:22,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 1692 flow [2024-06-04 14:59:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:59:22,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-04 14:59:22,719 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1113 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:59:22,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 1692 flow [2024-06-04 14:59:22,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 183 transitions, 1558 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:22,862 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1156 flow [2024-06-04 14:59:22,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1156, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-04 14:59:22,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-04 14:59:22,869 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1156 flow [2024-06-04 14:59:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:22,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:22,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:59:22,870 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:22,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -342788621, now seen corresponding path program 1 times [2024-06-04 14:59:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:22,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113031885] [2024-06-04 14:59:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:23,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:23,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113031885] [2024-06-04 14:59:23,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113031885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:23,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:23,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:59:23,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860946761] [2024-06-04 14:59:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:59:23,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:59:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:59:23,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:23,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1156 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:23,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:23,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:23,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:25,573 INFO L124 PetriNetUnfolderBase]: 10311/14649 cut-off events. [2024-06-04 14:59:25,573 INFO L125 PetriNetUnfolderBase]: For 219786/219917 co-relation queries the response was YES. [2024-06-04 14:59:25,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77221 conditions, 14649 events. 10311/14649 cut-off events. For 219786/219917 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 84297 event pairs, 4608 based on Foata normal form. 19/14529 useless extension candidates. Maximal degree in co-relation 77177. Up to 13853 conditions per place. [2024-06-04 14:59:25,682 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 120 selfloop transitions, 28 changer transitions 0/165 dead transitions. [2024-06-04 14:59:25,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 165 transitions, 1578 flow [2024-06-04 14:59:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:59:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:59:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 14:59:25,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-04 14:59:25,684 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1156 flow. Second operand 6 states and 156 transitions. [2024-06-04 14:59:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 165 transitions, 1578 flow [2024-06-04 14:59:25,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 165 transitions, 1464 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:25,786 INFO L231 Difference]: Finished difference. Result has 109 places, 142 transitions, 1173 flow [2024-06-04 14:59:25,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1173, PETRI_PLACES=109, PETRI_TRANSITIONS=142} [2024-06-04 14:59:25,786 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-04 14:59:25,786 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 142 transitions, 1173 flow [2024-06-04 14:59:25,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:25,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:25,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:59:25,787 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)] === [2024-06-04 14:59:25,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:25,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2127788912, now seen corresponding path program 4 times [2024-06-04 14:59:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:25,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601514586] [2024-06-04 14:59:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:26,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:26,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601514586] [2024-06-04 14:59:26,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601514586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:26,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:26,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:26,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134076151] [2024-06-04 14:59:26,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:26,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:26,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:26,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:26,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:26,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:26,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 142 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:26,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:26,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:26,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:28,806 INFO L124 PetriNetUnfolderBase]: 11000/15384 cut-off events. [2024-06-04 14:59:28,806 INFO L125 PetriNetUnfolderBase]: For 250441/250578 co-relation queries the response was YES. [2024-06-04 14:59:28,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83612 conditions, 15384 events. 11000/15384 cut-off events. For 250441/250578 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 85600 event pairs, 4509 based on Foata normal form. 30/15292 useless extension candidates. Maximal degree in co-relation 83567. Up to 14388 conditions per place. [2024-06-04 14:59:28,941 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 123 selfloop transitions, 57 changer transitions 0/190 dead transitions. [2024-06-04 14:59:28,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 190 transitions, 1757 flow [2024-06-04 14:59:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 14:59:28,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-04 14:59:28,943 INFO L175 Difference]: Start difference. First operand has 109 places, 142 transitions, 1173 flow. Second operand 8 states and 210 transitions. [2024-06-04 14:59:28,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 190 transitions, 1757 flow [2024-06-04 14:59:29,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 190 transitions, 1668 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:29,139 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1268 flow [2024-06-04 14:59:29,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1268, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2024-06-04 14:59:29,140 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-04 14:59:29,140 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1268 flow [2024-06-04 14:59:29,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:29,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:29,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:29,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:59:29,141 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)] === [2024-06-04 14:59:29,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2048768848, now seen corresponding path program 2 times [2024-06-04 14:59:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:29,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482402905] [2024-06-04 14:59:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:29,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482402905] [2024-06-04 14:59:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482402905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:30,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:30,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:30,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121543444] [2024-06-04 14:59:30,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:30,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:30,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:30,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:30,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1268 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:30,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:30,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:30,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:32,227 INFO L124 PetriNetUnfolderBase]: 11058/15495 cut-off events. [2024-06-04 14:59:32,227 INFO L125 PetriNetUnfolderBase]: For 275644/275791 co-relation queries the response was YES. [2024-06-04 14:59:32,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86300 conditions, 15495 events. 11058/15495 cut-off events. For 275644/275791 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86558 event pairs, 4661 based on Foata normal form. 20/15395 useless extension candidates. Maximal degree in co-relation 86254. Up to 14821 conditions per place. [2024-06-04 14:59:32,354 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 43 changer transitions 0/197 dead transitions. [2024-06-04 14:59:32,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 197 transitions, 1912 flow [2024-06-04 14:59:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 14:59:32,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-04 14:59:32,356 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1268 flow. Second operand 8 states and 203 transitions. [2024-06-04 14:59:32,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 197 transitions, 1912 flow [2024-06-04 14:59:32,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 197 transitions, 1758 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:32,519 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1362 flow [2024-06-04 14:59:32,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2024-06-04 14:59:32,520 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-04 14:59:32,520 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1362 flow [2024-06-04 14:59:32,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:32,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:32,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:32,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:59:32,520 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)] === [2024-06-04 14:59:32,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:32,521 INFO L85 PathProgramCache]: Analyzing trace with hash -288218036, now seen corresponding path program 3 times [2024-06-04 14:59:32,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:32,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334598012] [2024-06-04 14:59:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:32,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:33,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:33,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334598012] [2024-06-04 14:59:33,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334598012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:33,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:33,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707585009] [2024-06-04 14:59:33,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:33,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:33,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:33,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:33,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1362 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:33,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:33,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:33,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:35,661 INFO L124 PetriNetUnfolderBase]: 11094/15547 cut-off events. [2024-06-04 14:59:35,661 INFO L125 PetriNetUnfolderBase]: For 303174/303321 co-relation queries the response was YES. [2024-06-04 14:59:35,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89409 conditions, 15547 events. 11094/15547 cut-off events. For 303174/303321 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86982 event pairs, 4334 based on Foata normal form. 20/15447 useless extension candidates. Maximal degree in co-relation 89361. Up to 14736 conditions per place. [2024-06-04 14:59:35,795 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 54 changer transitions 0/207 dead transitions. [2024-06-04 14:59:35,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 207 transitions, 2156 flow [2024-06-04 14:59:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 14:59:35,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-04 14:59:35,797 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 1362 flow. Second operand 8 states and 207 transitions. [2024-06-04 14:59:35,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 207 transitions, 2156 flow [2024-06-04 14:59:35,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 207 transitions, 2044 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 14:59:36,003 INFO L231 Difference]: Finished difference. Result has 121 places, 161 transitions, 1518 flow [2024-06-04 14:59:36,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1518, PETRI_PLACES=121, PETRI_TRANSITIONS=161} [2024-06-04 14:59:36,003 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-04 14:59:36,003 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 161 transitions, 1518 flow [2024-06-04 14:59:36,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:36,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:36,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:36,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:59:36,004 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)] === [2024-06-04 14:59:36,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1968458412, now seen corresponding path program 4 times [2024-06-04 14:59:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:36,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59089876] [2024-06-04 14:59:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:37,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59089876] [2024-06-04 14:59:37,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59089876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:37,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:37,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:37,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34615185] [2024-06-04 14:59:37,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:37,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:37,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:37,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:37,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:37,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 161 transitions, 1518 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:37,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:37,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:37,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:39,222 INFO L124 PetriNetUnfolderBase]: 11079/15542 cut-off events. [2024-06-04 14:59:39,222 INFO L125 PetriNetUnfolderBase]: For 329556/329703 co-relation queries the response was YES. [2024-06-04 14:59:39,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90204 conditions, 15542 events. 11079/15542 cut-off events. For 329556/329703 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86958 event pairs, 4658 based on Foata normal form. 20/15442 useless extension candidates. Maximal degree in co-relation 90155. Up to 14852 conditions per place. [2024-06-04 14:59:39,368 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 151 selfloop transitions, 42 changer transitions 0/203 dead transitions. [2024-06-04 14:59:39,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 203 transitions, 2044 flow [2024-06-04 14:59:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 14:59:39,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-04 14:59:39,370 INFO L175 Difference]: Start difference. First operand has 121 places, 161 transitions, 1518 flow. Second operand 8 states and 204 transitions. [2024-06-04 14:59:39,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 203 transitions, 2044 flow [2024-06-04 14:59:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 203 transitions, 1882 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:39,635 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1450 flow [2024-06-04 14:59:39,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1356, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1450, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-04 14:59:39,635 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-04 14:59:39,635 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1450 flow [2024-06-04 14:59:39,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:39,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:39,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:59:39,636 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:39,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:39,636 INFO L85 PathProgramCache]: Analyzing trace with hash -342402671, now seen corresponding path program 2 times [2024-06-04 14:59:39,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:39,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475402091] [2024-06-04 14:59:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:40,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475402091] [2024-06-04 14:59:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475402091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:40,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:59:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151309379] [2024-06-04 14:59:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:59:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:59:40,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:59:40,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:40,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1450 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:40,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:40,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:40,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:42,388 INFO L124 PetriNetUnfolderBase]: 10441/14858 cut-off events. [2024-06-04 14:59:42,388 INFO L125 PetriNetUnfolderBase]: For 344316/344463 co-relation queries the response was YES. [2024-06-04 14:59:42,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87289 conditions, 14858 events. 10441/14858 cut-off events. For 344316/344463 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 85708 event pairs, 4612 based on Foata normal form. 17/14723 useless extension candidates. Maximal degree in co-relation 87238. Up to 14015 conditions per place. [2024-06-04 14:59:42,517 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 126 selfloop transitions, 35 changer transitions 0/183 dead transitions. [2024-06-04 14:59:42,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 1896 flow [2024-06-04 14:59:42,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:59:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:59:42,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 14:59:42,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-04 14:59:42,518 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1450 flow. Second operand 6 states and 152 transitions. [2024-06-04 14:59:42,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 1896 flow [2024-06-04 14:59:42,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 183 transitions, 1756 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 14:59:42,700 INFO L231 Difference]: Finished difference. Result has 122 places, 165 transitions, 1465 flow [2024-06-04 14:59:42,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1465, PETRI_PLACES=122, PETRI_TRANSITIONS=165} [2024-06-04 14:59:42,701 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-04 14:59:42,701 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 165 transitions, 1465 flow [2024-06-04 14:59:42,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:42,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:42,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:42,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:59:42,702 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)] === [2024-06-04 14:59:42,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1096162649, now seen corresponding path program 1 times [2024-06-04 14:59:42,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:42,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010644379] [2024-06-04 14:59:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:42,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:43,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010644379] [2024-06-04 14:59:43,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010644379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:43,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:43,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:59:43,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253798746] [2024-06-04 14:59:43,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:43,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:59:43,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:59:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:59:43,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:43,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 165 transitions, 1465 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:43,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:43,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:43,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:45,086 INFO L124 PetriNetUnfolderBase]: 9705/13999 cut-off events. [2024-06-04 14:59:45,086 INFO L125 PetriNetUnfolderBase]: For 323630/323790 co-relation queries the response was YES. [2024-06-04 14:59:45,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83803 conditions, 13999 events. 9705/13999 cut-off events. For 323630/323790 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 81595 event pairs, 3906 based on Foata normal form. 4/13822 useless extension candidates. Maximal degree in co-relation 83753. Up to 13174 conditions per place. [2024-06-04 14:59:45,214 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 14 changer transitions 0/191 dead transitions. [2024-06-04 14:59:45,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 191 transitions, 1965 flow [2024-06-04 14:59:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:59:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:59:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:59:45,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-04 14:59:45,215 INFO L175 Difference]: Start difference. First operand has 122 places, 165 transitions, 1465 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:59:45,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 191 transitions, 1965 flow [2024-06-04 14:59:45,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1848 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:45,441 INFO L231 Difference]: Finished difference. Result has 124 places, 169 transitions, 1463 flow [2024-06-04 14:59:45,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1463, PETRI_PLACES=124, PETRI_TRANSITIONS=169} [2024-06-04 14:59:45,445 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-04 14:59:45,445 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 169 transitions, 1463 flow [2024-06-04 14:59:45,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:45,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:45,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:45,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:59:45,446 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:45,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash -342396719, now seen corresponding path program 2 times [2024-06-04 14:59:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:45,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31474086] [2024-06-04 14:59:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:45,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:46,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31474086] [2024-06-04 14:59:46,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31474086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:46,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:46,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:59:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086633644] [2024-06-04 14:59:46,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:46,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:59:46,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:46,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:59:46,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:59:46,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 169 transitions, 1463 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:46,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:47,943 INFO L124 PetriNetUnfolderBase]: 9714/14018 cut-off events. [2024-06-04 14:59:47,943 INFO L125 PetriNetUnfolderBase]: For 350551/350731 co-relation queries the response was YES. [2024-06-04 14:59:48,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86637 conditions, 14018 events. 9714/14018 cut-off events. For 350551/350731 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 81804 event pairs, 3913 based on Foata normal form. 8/13845 useless extension candidates. Maximal degree in co-relation 86586. Up to 13159 conditions per place. [2024-06-04 14:59:48,101 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 161 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-06-04 14:59:48,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 193 transitions, 1969 flow [2024-06-04 14:59:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:59:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:59:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 14:59:48,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-04 14:59:48,103 INFO L175 Difference]: Start difference. First operand has 124 places, 169 transitions, 1463 flow. Second operand 6 states and 154 transitions. [2024-06-04 14:59:48,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 193 transitions, 1969 flow [2024-06-04 14:59:48,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 193 transitions, 1884 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:48,362 INFO L231 Difference]: Finished difference. Result has 126 places, 173 transitions, 1515 flow [2024-06-04 14:59:48,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=126, PETRI_TRANSITIONS=173} [2024-06-04 14:59:48,362 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-04 14:59:48,362 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 173 transitions, 1515 flow [2024-06-04 14:59:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:48,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:48,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:48,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:59:48,364 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:48,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash -342388783, now seen corresponding path program 1 times [2024-06-04 14:59:48,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:48,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439028757] [2024-06-04 14:59:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:48,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:49,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:49,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439028757] [2024-06-04 14:59:49,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439028757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:49,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:59:49,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223066713] [2024-06-04 14:59:49,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:49,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:59:49,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:59:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:59:49,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 14:59:49,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 173 transitions, 1515 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:49,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:49,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 14:59:49,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:51,271 INFO L124 PetriNetUnfolderBase]: 9828/14140 cut-off events. [2024-06-04 14:59:51,272 INFO L125 PetriNetUnfolderBase]: For 419142/419159 co-relation queries the response was YES. [2024-06-04 14:59:51,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92109 conditions, 14140 events. 9828/14140 cut-off events. For 419142/419159 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 82332 event pairs, 4354 based on Foata normal form. 18/14135 useless extension candidates. Maximal degree in co-relation 92057. Up to 13290 conditions per place. [2024-06-04 14:59:51,408 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 156 selfloop transitions, 27 changer transitions 0/202 dead transitions. [2024-06-04 14:59:51,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 2129 flow [2024-06-04 14:59:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:59:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:59:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 14:59:51,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-04 14:59:51,409 INFO L175 Difference]: Start difference. First operand has 126 places, 173 transitions, 1515 flow. Second operand 7 states and 179 transitions. [2024-06-04 14:59:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 2129 flow [2024-06-04 14:59:51,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 202 transitions, 2022 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:51,655 INFO L231 Difference]: Finished difference. Result has 129 places, 178 transitions, 1562 flow [2024-06-04 14:59:51,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1562, PETRI_PLACES=129, PETRI_TRANSITIONS=178} [2024-06-04 14:59:51,656 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-04 14:59:51,656 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 178 transitions, 1562 flow [2024-06-04 14:59:51,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:51,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:51,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:51,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:59:51,657 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)] === [2024-06-04 14:59:51,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1732513484, now seen corresponding path program 1 times [2024-06-04 14:59:51,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:51,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130422964] [2024-06-04 14:59:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:51,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:52,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:52,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130422964] [2024-06-04 14:59:52,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130422964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:52,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:52,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:52,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879794411] [2024-06-04 14:59:52,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:52,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:52,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:53,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:53,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 178 transitions, 1562 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:53,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:53,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:53,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:55,653 INFO L124 PetriNetUnfolderBase]: 11443/16054 cut-off events. [2024-06-04 14:59:55,653 INFO L125 PetriNetUnfolderBase]: For 529754/529825 co-relation queries the response was YES. [2024-06-04 14:59:55,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109830 conditions, 16054 events. 11443/16054 cut-off events. For 529754/529825 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 89699 event pairs, 4665 based on Foata normal form. 19/15948 useless extension candidates. Maximal degree in co-relation 109777. Up to 14677 conditions per place. [2024-06-04 14:59:55,809 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 79 changer transitions 0/249 dead transitions. [2024-06-04 14:59:55,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 249 transitions, 2441 flow [2024-06-04 14:59:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-04 14:59:55,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989517819706499 [2024-06-04 14:59:55,811 INFO L175 Difference]: Start difference. First operand has 129 places, 178 transitions, 1562 flow. Second operand 9 states and 238 transitions. [2024-06-04 14:59:55,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 249 transitions, 2441 flow [2024-06-04 14:59:56,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 249 transitions, 2323 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:56,104 INFO L231 Difference]: Finished difference. Result has 135 places, 194 transitions, 1862 flow [2024-06-04 14:59:56,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1862, PETRI_PLACES=135, PETRI_TRANSITIONS=194} [2024-06-04 14:59:56,104 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-04 14:59:56,104 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 194 transitions, 1862 flow [2024-06-04 14:59:56,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:56,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:56,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:56,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:59:56,105 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:56,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:56,105 INFO L85 PathProgramCache]: Analyzing trace with hash 445677363, now seen corresponding path program 1 times [2024-06-04 14:59:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:56,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342249479] [2024-06-04 14:59:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:56,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342249479] [2024-06-04 14:59:56,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342249479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:56,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:56,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:59:56,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390536346] [2024-06-04 14:59:56,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:56,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:59:56,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:59:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:59:57,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 14:59:57,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 194 transitions, 1862 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:57,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:57,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 14:59:57,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:59,316 INFO L124 PetriNetUnfolderBase]: 11468/16041 cut-off events. [2024-06-04 14:59:59,316 INFO L125 PetriNetUnfolderBase]: For 567980/568023 co-relation queries the response was YES. [2024-06-04 14:59:59,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113269 conditions, 16041 events. 11468/16041 cut-off events. For 567980/568023 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90040 event pairs, 4934 based on Foata normal form. 21/16020 useless extension candidates. Maximal degree in co-relation 113213. Up to 15429 conditions per place. [2024-06-04 14:59:59,466 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 181 selfloop transitions, 39 changer transitions 0/238 dead transitions. [2024-06-04 14:59:59,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 238 transitions, 2758 flow [2024-06-04 14:59:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:59:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:59:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 14:59:59,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-04 14:59:59,468 INFO L175 Difference]: Start difference. First operand has 135 places, 194 transitions, 1862 flow. Second operand 7 states and 180 transitions. [2024-06-04 14:59:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 238 transitions, 2758 flow [2024-06-04 14:59:59,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 238 transitions, 2596 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:59,727 INFO L231 Difference]: Finished difference. Result has 140 places, 208 transitions, 2047 flow [2024-06-04 14:59:59,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2047, PETRI_PLACES=140, PETRI_TRANSITIONS=208} [2024-06-04 14:59:59,728 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-04 14:59:59,728 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 208 transitions, 2047 flow [2024-06-04 14:59:59,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:59,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:59,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:59,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:59:59,729 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 14:59:59,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash -912674150, now seen corresponding path program 2 times [2024-06-04 14:59:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142161807] [2024-06-04 14:59:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:59,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:01,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:01,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142161807] [2024-06-04 15:00:01,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142161807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:01,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:01,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:01,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145562133] [2024-06-04 15:00:01,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:01,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:01,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:01,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:00:01,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 208 transitions, 2047 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:01,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:01,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:00:01,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:03,617 INFO L124 PetriNetUnfolderBase]: 11871/16654 cut-off events. [2024-06-04 15:00:03,617 INFO L125 PetriNetUnfolderBase]: For 631588/631732 co-relation queries the response was YES. [2024-06-04 15:00:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121564 conditions, 16654 events. 11871/16654 cut-off events. For 631588/631732 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 93616 event pairs, 4692 based on Foata normal form. 19/16533 useless extension candidates. Maximal degree in co-relation 121505. Up to 15392 conditions per place. [2024-06-04 15:00:03,800 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 172 selfloop transitions, 86 changer transitions 0/272 dead transitions. [2024-06-04 15:00:03,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 272 transitions, 2916 flow [2024-06-04 15:00:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-04 15:00:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-04 15:00:03,806 INFO L175 Difference]: Start difference. First operand has 140 places, 208 transitions, 2047 flow. Second operand 9 states and 235 transitions. [2024-06-04 15:00:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 272 transitions, 2916 flow [2024-06-04 15:00:04,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 272 transitions, 2822 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-04 15:00:04,228 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2342 flow [2024-06-04 15:00:04,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2342, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-04 15:00:04,230 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-04 15:00:04,230 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2342 flow [2024-06-04 15:00:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:04,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:04,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:00:04,231 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:00:04,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash -646976870, now seen corresponding path program 3 times [2024-06-04 15:00:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:04,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969836005] [2024-06-04 15:00:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:05,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:05,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969836005] [2024-06-04 15:00:05,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969836005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:05,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:05,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229590131] [2024-06-04 15:00:05,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:05,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:00:05,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2342 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:05,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:05,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:00:05,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:08,475 INFO L124 PetriNetUnfolderBase]: 12055/16966 cut-off events. [2024-06-04 15:00:08,476 INFO L125 PetriNetUnfolderBase]: For 692538/692682 co-relation queries the response was YES. [2024-06-04 15:00:08,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126827 conditions, 16966 events. 12055/16966 cut-off events. For 692538/692682 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 95958 event pairs, 4339 based on Foata normal form. 19/16845 useless extension candidates. Maximal degree in co-relation 126764. Up to 14691 conditions per place. [2024-06-04 15:00:08,655 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 161 selfloop transitions, 106 changer transitions 0/281 dead transitions. [2024-06-04 15:00:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 281 transitions, 3396 flow [2024-06-04 15:00:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-04 15:00:08,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-04 15:00:08,657 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2342 flow. Second operand 9 states and 237 transitions. [2024-06-04 15:00:08,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 281 transitions, 3396 flow [2024-06-04 15:00:09,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 281 transitions, 3235 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:09,114 INFO L231 Difference]: Finished difference. Result has 156 places, 226 transitions, 2657 flow [2024-06-04 15:00:09,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2657, PETRI_PLACES=156, PETRI_TRANSITIONS=226} [2024-06-04 15:00:09,115 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-04 15:00:09,115 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 226 transitions, 2657 flow [2024-06-04 15:00:09,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:09,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:09,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:09,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:00:09,116 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:00:09,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:09,116 INFO L85 PathProgramCache]: Analyzing trace with hash -892667626, now seen corresponding path program 4 times [2024-06-04 15:00:09,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:09,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975630365] [2024-06-04 15:00:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:10,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:10,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975630365] [2024-06-04 15:00:10,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975630365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:10,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252216719] [2024-06-04 15:00:10,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:10,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:11,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:00:11,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 226 transitions, 2657 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:11,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:11,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:00:11,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:14,033 INFO L124 PetriNetUnfolderBase]: 12016/16909 cut-off events. [2024-06-04 15:00:14,034 INFO L125 PetriNetUnfolderBase]: For 719964/720108 co-relation queries the response was YES. [2024-06-04 15:00:14,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126744 conditions, 16909 events. 12016/16909 cut-off events. For 719964/720108 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 95625 event pairs, 4719 based on Foata normal form. 19/16788 useless extension candidates. Maximal degree in co-relation 126679. Up to 15615 conditions per place. [2024-06-04 15:00:14,188 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 179 selfloop transitions, 84 changer transitions 0/277 dead transitions. [2024-06-04 15:00:14,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 277 transitions, 3331 flow [2024-06-04 15:00:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-04 15:00:14,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-04 15:00:14,190 INFO L175 Difference]: Start difference. First operand has 156 places, 226 transitions, 2657 flow. Second operand 9 states and 235 transitions. [2024-06-04 15:00:14,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 277 transitions, 3331 flow [2024-06-04 15:00:14,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 277 transitions, 3145 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:14,661 INFO L231 Difference]: Finished difference. Result has 159 places, 225 transitions, 2602 flow [2024-06-04 15:00:14,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=159, PETRI_TRANSITIONS=225} [2024-06-04 15:00:14,662 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-04 15:00:14,662 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 225 transitions, 2602 flow [2024-06-04 15:00:14,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:14,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:14,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:14,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:00:14,663 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:00:14,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1203906363, now seen corresponding path program 2 times [2024-06-04 15:00:14,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519902381] [2024-06-04 15:00:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:15,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:15,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519902381] [2024-06-04 15:00:15,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519902381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:15,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:15,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:15,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075321590] [2024-06-04 15:00:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:15,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:15,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:15,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:15,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:00:15,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 225 transitions, 2602 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:15,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:15,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:00:15,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:18,514 INFO L124 PetriNetUnfolderBase]: 11863/16682 cut-off events. [2024-06-04 15:00:18,514 INFO L125 PetriNetUnfolderBase]: For 736545/736586 co-relation queries the response was YES. [2024-06-04 15:00:18,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126310 conditions, 16682 events. 11863/16682 cut-off events. For 736545/736586 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 94791 event pairs, 4982 based on Foata normal form. 27/16644 useless extension candidates. Maximal degree in co-relation 126243. Up to 15918 conditions per place. [2024-06-04 15:00:18,703 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 187 selfloop transitions, 57 changer transitions 0/262 dead transitions. [2024-06-04 15:00:18,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 262 transitions, 3622 flow [2024-06-04 15:00:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 15:00:18,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-04 15:00:18,705 INFO L175 Difference]: Start difference. First operand has 159 places, 225 transitions, 2602 flow. Second operand 7 states and 177 transitions. [2024-06-04 15:00:18,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 262 transitions, 3622 flow [2024-06-04 15:00:19,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 262 transitions, 3342 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:19,067 INFO L231 Difference]: Finished difference. Result has 159 places, 235 transitions, 2635 flow [2024-06-04 15:00:19,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2322, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2635, PETRI_PLACES=159, PETRI_TRANSITIONS=235} [2024-06-04 15:00:19,068 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-04 15:00:19,068 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 235 transitions, 2635 flow [2024-06-04 15:00:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:19,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:00:19,069 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:00:19,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2024130705, now seen corresponding path program 3 times [2024-06-04 15:00:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573389184] [2024-06-04 15:00:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:20,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573389184] [2024-06-04 15:00:20,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573389184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:20,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544390417] [2024-06-04 15:00:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:20,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:00:20,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 235 transitions, 2635 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:20,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:20,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:00:20,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:23,050 INFO L124 PetriNetUnfolderBase]: 11859/16667 cut-off events. [2024-06-04 15:00:23,050 INFO L125 PetriNetUnfolderBase]: For 781154/781201 co-relation queries the response was YES. [2024-06-04 15:00:23,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129849 conditions, 16667 events. 11859/16667 cut-off events. For 781154/781201 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 94648 event pairs, 4980 based on Foata normal form. 39/16626 useless extension candidates. Maximal degree in co-relation 129782. Up to 15920 conditions per place. [2024-06-04 15:00:23,204 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 66 changer transitions 0/264 dead transitions. [2024-06-04 15:00:23,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 264 transitions, 3437 flow [2024-06-04 15:00:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 15:00:23,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-04 15:00:23,205 INFO L175 Difference]: Start difference. First operand has 159 places, 235 transitions, 2635 flow. Second operand 7 states and 175 transitions. [2024-06-04 15:00:23,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 264 transitions, 3437 flow [2024-06-04 15:00:23,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 264 transitions, 3235 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:23,602 INFO L231 Difference]: Finished difference. Result has 162 places, 240 transitions, 2691 flow [2024-06-04 15:00:23,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2691, PETRI_PLACES=162, PETRI_TRANSITIONS=240} [2024-06-04 15:00:23,602 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-04 15:00:23,602 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 240 transitions, 2691 flow [2024-06-04 15:00:23,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:23,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:23,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:23,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:00:23,603 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:00:23,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:23,604 INFO L85 PathProgramCache]: Analyzing trace with hash 549395637, now seen corresponding path program 1 times [2024-06-04 15:00:23,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:23,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401008905] [2024-06-04 15:00:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401008905] [2024-06-04 15:00:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401008905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:24,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050883106] [2024-06-04 15:00:24,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:24,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:24,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:24,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-04 15:00:24,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 240 transitions, 2691 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:24,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:24,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-04 15:00:24,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:27,302 INFO L124 PetriNetUnfolderBase]: 10669/15474 cut-off events. [2024-06-04 15:00:27,303 INFO L125 PetriNetUnfolderBase]: For 702324/702465 co-relation queries the response was YES. [2024-06-04 15:00:27,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116895 conditions, 15474 events. 10669/15474 cut-off events. For 702324/702465 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 91713 event pairs, 4009 based on Foata normal form. 3/15304 useless extension candidates. Maximal degree in co-relation 116827. Up to 14429 conditions per place. [2024-06-04 15:00:27,441 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 236 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2024-06-04 15:00:27,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 272 transitions, 3393 flow [2024-06-04 15:00:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 15:00:27,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-04 15:00:27,443 INFO L175 Difference]: Start difference. First operand has 162 places, 240 transitions, 2691 flow. Second operand 7 states and 177 transitions. [2024-06-04 15:00:27,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 272 transitions, 3393 flow [2024-06-04 15:00:27,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 272 transitions, 3229 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 15:00:27,845 INFO L231 Difference]: Finished difference. Result has 165 places, 244 transitions, 2686 flow [2024-06-04 15:00:27,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2686, PETRI_PLACES=165, PETRI_TRANSITIONS=244} [2024-06-04 15:00:27,846 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-04 15:00:27,846 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 244 transitions, 2686 flow [2024-06-04 15:00:27,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:27,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:27,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:27,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:00:27,846 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:00:27,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 378698043, now seen corresponding path program 1 times [2024-06-04 15:00:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:27,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018014415] [2024-06-04 15:00:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018014415] [2024-06-04 15:00:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018014415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:28,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:28,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449490162] [2024-06-04 15:00:28,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:28,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-04 15:00:28,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 244 transitions, 2686 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:28,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:28,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-04 15:00:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand