./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix027_power.opt_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/mix027_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix027_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix027_power.opt_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-cde23df-m [2024-06-14 12:13:17,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:13:17,905 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:13:17,908 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:13:17,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:13:17,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:13:17,922 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:13:17,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:13:17,926 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:13:17,926 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:13:17,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:13:17,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:13:17,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:13:17,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:13:17,929 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:13:17,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:13:17,930 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:13:17,932 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:13:17,932 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:13:17,933 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:13:17,933 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:13:17,933 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:13:17,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:13:17,934 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:13:17,934 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:13:17,934 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:13:17,934 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:13:17,935 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:13:17,935 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:13:17,935 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:13:17,936 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:13:17,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:13:17,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:13:17,937 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:13:17,937 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:13:17,937 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:13:17,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:13:17,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:13:17,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:13:17,938 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:13:17,938 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:13:17,939 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:13:17,939 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:13:17,939 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:13:18,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:13:18,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:13:18,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:13:18,131 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:13:18,132 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:13:18,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix027_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:13:18,296 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:13:18,297 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:13:18,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix027_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:13:19,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:13:19,486 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:13:19,489 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix027_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:13:19,502 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e089fabd/0048db433d53419195d81114b33c8151/FLAGc9a83e8e9 [2024-06-14 12:13:19,514 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e089fabd/0048db433d53419195d81114b33c8151 [2024-06-14 12:13:19,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:13:19,515 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:13:19,516 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:13:19,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:13:19,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:13:19,520 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:13:18" (1/2) ... [2024-06-14 12:13:19,521 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5170ff6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:13:19, skipping insertion in model container [2024-06-14 12:13:19,521 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:13:18" (1/2) ... [2024-06-14 12:13:19,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f8cddb8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:13:19, skipping insertion in model container [2024-06-14 12:13:19,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:13:19" (2/2) ... [2024-06-14 12:13:19,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5170ff6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:19, skipping insertion in model container [2024-06-14 12:13:19,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:13:19" (2/2) ... [2024-06-14 12:13:19,523 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:13:19,607 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:13:19,608 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_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 || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-14 12:13:19,609 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-14 12:13:19,609 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_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 || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-14 12:13:19,609 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || y$flush_delayed == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-14 12:13:19,609 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:13:19,610 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-14 12:13:19,646 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:13:19,901 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:13:19,908 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:13:20,052 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:13:20,079 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:13:20,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20 WrapperNode [2024-06-14 12:13:20,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:13:20,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:13:20,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:13:20,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:13:20,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,125 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-14 12:13:20,125 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:13:20,126 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:13:20,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:13:20,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:13:20,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,145 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,157 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]. [2024-06-14 12:13:20,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,183 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:13:20,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:13:20,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:13:20,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:13:20,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (1/1) ... [2024-06-14 12:13:20,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:13:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:13:20,248 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) [2024-06-14 12:13:20,265 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 [2024-06-14 12:13:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:13:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:13:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:13:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:13:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:13:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:13:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:13:20,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:13:20,277 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:13:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:13:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:13:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:13:20,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:13:20,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:13:20,279 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:13:20,376 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:13:20,378 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:13:20,763 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:13:20,765 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:13:20,927 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:13:20,927 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:13:20,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:13:20 BoogieIcfgContainer [2024-06-14 12:13:20,928 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:13:20,931 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:13:20,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:13:20,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:13:20,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:13:18" (1/4) ... [2024-06-14 12:13:20,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3b30eb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:13:20, skipping insertion in model container [2024-06-14 12:13:20,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:13:19" (2/4) ... [2024-06-14 12:13:20,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3b30eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:13:20, skipping insertion in model container [2024-06-14 12:13:20,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:13:20" (3/4) ... [2024-06-14 12:13:20,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3b30eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:13:20, skipping insertion in model container [2024-06-14 12:13:20,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:13:20" (4/4) ... [2024-06-14 12:13:20,936 INFO L112 eAbstractionObserver]: Analyzing ICFG mix027_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:13:20,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:13:20,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:13:20,949 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:13:21,000 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:13:21,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:13:21,085 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:13:21,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:13:21,087 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 86 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. [2024-06-14 12:13:21,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:13:21,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:13:21,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:13:21,110 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;@557c4cc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:13:21,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:13:21,115 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:13:21,115 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:13:21,115 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:13:21,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:21,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:13:21,116 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)] === [2024-06-14 12:13:21,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:21,120 INFO L85 PathProgramCache]: Analyzing trace with hash -828717548, now seen corresponding path program 1 times [2024-06-14 12:13:21,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:21,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258671332] [2024-06-14 12:13:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:21,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:22,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258671332] [2024-06-14 12:13:22,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258671332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:22,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:22,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:13:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884109345] [2024-06-14 12:13:22,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:22,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:13:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:13:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:13:22,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:13:22,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:22,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:22,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:13:22,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:23,420 INFO L124 PetriNetUnfolderBase]: 8152/11676 cut-off events. [2024-06-14 12:13:23,420 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-14 12:13:23,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23165 conditions, 11676 events. 8152/11676 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 66139 event pairs, 6174 based on Foata normal form. 1/11316 useless extension candidates. Maximal degree in co-relation 23149. Up to 11108 conditions per place. [2024-06-14 12:13:23,505 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:13:23,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-14 12:13:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:13:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:13:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-14 12:13:23,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-06-14 12:13:23,516 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 98 transitions. [2024-06-14 12:13:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-14 12:13:23,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:23,523 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:13:23,524 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} [2024-06-14 12:13:23,527 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:13:23,527 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:13:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:23,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:23,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:13:23,528 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)] === [2024-06-14 12:13:23,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1828583821, now seen corresponding path program 1 times [2024-06-14 12:13:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434520186] [2024-06-14 12:13:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:24,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434520186] [2024-06-14 12:13:24,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434520186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:24,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:24,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:13:24,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411164112] [2024-06-14 12:13:24,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:24,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:13:24,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:24,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:13:24,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:13:24,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:24,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:24,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:24,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:24,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:25,674 INFO L124 PetriNetUnfolderBase]: 9537/13257 cut-off events. [2024-06-14 12:13:25,674 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2024-06-14 12:13:25,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30022 conditions, 13257 events. 9537/13257 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 72243 event pairs, 6489 based on Foata normal form. 4/13253 useless extension candidates. Maximal degree in co-relation 30007. Up to 12918 conditions per place. [2024-06-14 12:13:25,741 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:13:25,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-14 12:13:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:13:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:13:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-14 12:13:25,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-14 12:13:25,743 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 124 transitions. [2024-06-14 12:13:25,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-14 12:13:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:13:25,745 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:13:25,746 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} [2024-06-14 12:13:25,746 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:13:25,746 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:13:25,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:25,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:25,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:25,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:13:25,747 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)] === [2024-06-14 12:13:25,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -851522603, now seen corresponding path program 1 times [2024-06-14 12:13:25,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:25,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812221947] [2024-06-14 12:13:25,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:25,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:26,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:26,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:26,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812221947] [2024-06-14 12:13:26,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812221947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:26,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:26,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:13:26,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867619857] [2024-06-14 12:13:26,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:26,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:13:26,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:13:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:13:26,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:26,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:26,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:26,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:26,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:27,622 INFO L124 PetriNetUnfolderBase]: 9583/13366 cut-off events. [2024-06-14 12:13:27,622 INFO L125 PetriNetUnfolderBase]: For 7144/7144 co-relation queries the response was YES. [2024-06-14 12:13:27,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33656 conditions, 13366 events. 9583/13366 cut-off events. For 7144/7144 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 73380 event pairs, 4658 based on Foata normal form. 10/13367 useless extension candidates. Maximal degree in co-relation 33639. Up to 12775 conditions per place. [2024-06-14 12:13:27,686 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 76 selfloop transitions, 21 changer transitions 0/104 dead transitions. [2024-06-14 12:13:27,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 104 transitions, 555 flow [2024-06-14 12:13:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:13:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:13:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-14 12:13:27,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-06-14 12:13:27,688 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 165 transitions. [2024-06-14 12:13:27,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 104 transitions, 555 flow [2024-06-14 12:13:27,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 104 transitions, 536 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:13:27,692 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-14 12:13:27,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-14 12:13:27,693 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-14 12:13:27,693 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-14 12:13:27,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:27,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:27,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:13:27,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:27,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -551653160, now seen corresponding path program 1 times [2024-06-14 12:13:27,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:27,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468447625] [2024-06-14 12:13:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:27,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:28,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:28,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468447625] [2024-06-14 12:13:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468447625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:13:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972841619] [2024-06-14 12:13:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:28,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:13:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:13:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:13:28,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:28,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 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) [2024-06-14 12:13:28,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:28,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:29,788 INFO L124 PetriNetUnfolderBase]: 9770/13655 cut-off events. [2024-06-14 12:13:29,789 INFO L125 PetriNetUnfolderBase]: For 17643/17643 co-relation queries the response was YES. [2024-06-14 12:13:29,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40266 conditions, 13655 events. 9770/13655 cut-off events. For 17643/17643 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 75411 event pairs, 3715 based on Foata normal form. 38/13684 useless extension candidates. Maximal degree in co-relation 40246. Up to 12776 conditions per place. [2024-06-14 12:13:29,873 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 24 changer transitions 0/118 dead transitions. [2024-06-14 12:13:29,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 118 transitions, 714 flow [2024-06-14 12:13:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-14 12:13:29,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6069182389937107 [2024-06-14 12:13:29,877 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 193 transitions. [2024-06-14 12:13:29,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 118 transitions, 714 flow [2024-06-14 12:13:29,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 702 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:13:29,889 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-14 12:13:29,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-14 12:13:29,890 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-14 12:13:29,890 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-14 12:13:29,891 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) [2024-06-14 12:13:29,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:29,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:29,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:13:29,891 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)] === [2024-06-14 12:13:29,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1567620252, now seen corresponding path program 1 times [2024-06-14 12:13:29,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:29,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354096943] [2024-06-14 12:13:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:29,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:30,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:30,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354096943] [2024-06-14 12:13:30,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354096943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:30,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:30,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:13:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2904058] [2024-06-14 12:13:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:30,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:13:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:30,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:13:30,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:13:30,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:30,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 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) [2024-06-14 12:13:30,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:30,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:30,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:31,889 INFO L124 PetriNetUnfolderBase]: 8357/12037 cut-off events. [2024-06-14 12:13:31,889 INFO L125 PetriNetUnfolderBase]: For 22129/22129 co-relation queries the response was YES. [2024-06-14 12:13:31,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37934 conditions, 12037 events. 8357/12037 cut-off events. For 22129/22129 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 68997 event pairs, 4047 based on Foata normal form. 6/11869 useless extension candidates. Maximal degree in co-relation 37911. Up to 11393 conditions per place. [2024-06-14 12:13:31,959 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 67 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-14 12:13:31,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 85 transitions, 581 flow [2024-06-14 12:13:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:13:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:13:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 12:13:31,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-14 12:13:31,963 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 133 transitions. [2024-06-14 12:13:31,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 85 transitions, 581 flow [2024-06-14 12:13:31,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 520 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:31,972 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-14 12:13:31,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-14 12:13:31,977 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-14 12:13:31,978 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-14 12:13:31,978 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) [2024-06-14 12:13:31,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:31,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:31,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:13:31,978 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)] === [2024-06-14 12:13:31,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1865152089, now seen corresponding path program 1 times [2024-06-14 12:13:31,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:31,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611596530] [2024-06-14 12:13:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:31,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611596530] [2024-06-14 12:13:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611596530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653270658] [2024-06-14 12:13:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:32,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:32,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 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) [2024-06-14 12:13:32,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:32,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:32,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:34,258 INFO L124 PetriNetUnfolderBase]: 9778/13647 cut-off events. [2024-06-14 12:13:34,259 INFO L125 PetriNetUnfolderBase]: For 29897/29897 co-relation queries the response was YES. [2024-06-14 12:13:34,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43804 conditions, 13647 events. 9778/13647 cut-off events. For 29897/29897 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75104 event pairs, 4534 based on Foata normal form. 12/13651 useless extension candidates. Maximal degree in co-relation 43779. Up to 13062 conditions per place. [2024-06-14 12:13:34,318 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-14 12:13:34,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 688 flow [2024-06-14 12:13:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 12:13:34,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-14 12:13:34,322 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 165 transitions. [2024-06-14 12:13:34,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 688 flow [2024-06-14 12:13:34,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 659 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:34,331 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-14 12:13:34,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-14 12:13:34,334 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 12:13:34,334 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-14 12:13:34,335 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) [2024-06-14 12:13:34,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:34,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:34,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:13:34,335 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)] === [2024-06-14 12:13:34,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:34,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1049227417, now seen corresponding path program 2 times [2024-06-14 12:13:34,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421819403] [2024-06-14 12:13:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:35,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:35,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421819403] [2024-06-14 12:13:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421819403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:35,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:35,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:35,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770776319] [2024-06-14 12:13:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:35,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:35,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 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) [2024-06-14 12:13:35,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:35,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:35,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:36,603 INFO L124 PetriNetUnfolderBase]: 9709/13519 cut-off events. [2024-06-14 12:13:36,603 INFO L125 PetriNetUnfolderBase]: For 35826/35826 co-relation queries the response was YES. [2024-06-14 12:13:36,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44657 conditions, 13519 events. 9709/13519 cut-off events. For 35826/35826 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74008 event pairs, 4548 based on Foata normal form. 6/13511 useless extension candidates. Maximal degree in co-relation 44632. Up to 12969 conditions per place. [2024-06-14 12:13:36,673 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 65 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-14 12:13:36,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 668 flow [2024-06-14 12:13:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:13:36,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-14 12:13:36,675 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:13:36,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 668 flow [2024-06-14 12:13:36,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 625 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:36,689 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-14 12:13:36,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-14 12:13:36,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 12:13:36,690 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-14 12:13:36,691 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) [2024-06-14 12:13:36,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:36,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:36,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:13:36,691 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)] === [2024-06-14 12:13:36,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2132448901, now seen corresponding path program 1 times [2024-06-14 12:13:36,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:36,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215699814] [2024-06-14 12:13:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:36,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:37,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:37,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215699814] [2024-06-14 12:13:37,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215699814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:37,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:37,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:37,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419905834] [2024-06-14 12:13:37,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:37,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:37,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:37,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:37,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:37,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 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) [2024-06-14 12:13:37,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:37,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:37,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:39,436 INFO L124 PetriNetUnfolderBase]: 8299/11735 cut-off events. [2024-06-14 12:13:39,437 INFO L125 PetriNetUnfolderBase]: For 36609/36609 co-relation queries the response was YES. [2024-06-14 12:13:39,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39746 conditions, 11735 events. 8299/11735 cut-off events. For 36609/36609 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 65449 event pairs, 3868 based on Foata normal form. 6/11611 useless extension candidates. Maximal degree in co-relation 39720. Up to 11267 conditions per place. [2024-06-14 12:13:39,511 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 85 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-14 12:13:39,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 779 flow [2024-06-14 12:13:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:13:39,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:13:39,513 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:13:39,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 779 flow [2024-06-14 12:13:39,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 688 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:39,537 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-14 12:13:39,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-14 12:13:39,537 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-14 12:13:39,538 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-14 12:13:39,538 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) [2024-06-14 12:13:39,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:39,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:39,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:13:39,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:39,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1811166309, now seen corresponding path program 1 times [2024-06-14 12:13:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:39,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597734625] [2024-06-14 12:13:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:39,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:40,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597734625] [2024-06-14 12:13:40,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597734625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:40,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:40,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:13:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620373699] [2024-06-14 12:13:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:40,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:13:40,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:40,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:13:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:13:40,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:13:40,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:40,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:40,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:13:40,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:41,683 INFO L124 PetriNetUnfolderBase]: 8292/12018 cut-off events. [2024-06-14 12:13:41,683 INFO L125 PetriNetUnfolderBase]: For 44597/44597 co-relation queries the response was YES. [2024-06-14 12:13:41,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42609 conditions, 12018 events. 8292/12018 cut-off events. For 44597/44597 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 69174 event pairs, 3960 based on Foata normal form. 2/11867 useless extension candidates. Maximal degree in co-relation 42581. Up to 11309 conditions per place. [2024-06-14 12:13:41,753 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 78 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-06-14 12:13:41,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 96 transitions, 703 flow [2024-06-14 12:13:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:13:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:13:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 12:13:41,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2024-06-14 12:13:41,755 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 128 transitions. [2024-06-14 12:13:41,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 96 transitions, 703 flow [2024-06-14 12:13:41,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 655 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:41,779 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-14 12:13:41,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-14 12:13:41,780 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 12:13:41,780 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-14 12:13:41,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:41,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:41,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:41,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:13:41,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:41,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash 327669183, now seen corresponding path program 1 times [2024-06-14 12:13:41,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:41,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925716228] [2024-06-14 12:13:41,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:42,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:42,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925716228] [2024-06-14 12:13:42,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925716228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:42,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:42,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:42,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119196332] [2024-06-14 12:13:42,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:42,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:42,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:42,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:42,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:42,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:42,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:43,869 INFO L124 PetriNetUnfolderBase]: 9690/13576 cut-off events. [2024-06-14 12:13:43,869 INFO L125 PetriNetUnfolderBase]: For 64936/64936 co-relation queries the response was YES. [2024-06-14 12:13:43,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51752 conditions, 13576 events. 9690/13576 cut-off events. For 64936/64936 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 74827 event pairs, 4708 based on Foata normal form. 3/13576 useless extension candidates. Maximal degree in co-relation 51723. Up to 13130 conditions per place. [2024-06-14 12:13:43,957 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 87 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-14 12:13:43,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 890 flow [2024-06-14 12:13:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 12:13:43,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 12:13:43,958 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 6 states and 151 transitions. [2024-06-14 12:13:43,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 890 flow [2024-06-14 12:13:43,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 851 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:43,990 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 635 flow [2024-06-14 12:13:43,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-14 12:13:43,990 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-14 12:13:43,990 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 635 flow [2024-06-14 12:13:43,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:43,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:43,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:43,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:13:43,991 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)] === [2024-06-14 12:13:43,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:43,991 INFO L85 PathProgramCache]: Analyzing trace with hash 636523040, now seen corresponding path program 1 times [2024-06-14 12:13:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:43,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826680961] [2024-06-14 12:13:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:44,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:44,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826680961] [2024-06-14 12:13:44,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826680961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:44,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:44,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:44,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284610562] [2024-06-14 12:13:44,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:44,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:44,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:44,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:44,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 635 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:44,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:44,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:44,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:46,472 INFO L124 PetriNetUnfolderBase]: 10747/14980 cut-off events. [2024-06-14 12:13:46,473 INFO L125 PetriNetUnfolderBase]: For 99582/99683 co-relation queries the response was YES. [2024-06-14 12:13:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62459 conditions, 14980 events. 10747/14980 cut-off events. For 99582/99683 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 82996 event pairs, 3572 based on Foata normal form. 24/14887 useless extension candidates. Maximal degree in co-relation 62427. Up to 13599 conditions per place. [2024-06-14 12:13:46,575 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 106 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2024-06-14 12:13:46,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 148 transitions, 1159 flow [2024-06-14 12:13:46,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 12:13:46,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-14 12:13:46,577 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 635 flow. Second operand 7 states and 194 transitions. [2024-06-14 12:13:46,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 148 transitions, 1159 flow [2024-06-14 12:13:46,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 1125 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-14 12:13:46,626 INFO L231 Difference]: Finished difference. Result has 88 places, 100 transitions, 738 flow [2024-06-14 12:13:46,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=738, PETRI_PLACES=88, PETRI_TRANSITIONS=100} [2024-06-14 12:13:46,626 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-14 12:13:46,627 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 100 transitions, 738 flow [2024-06-14 12:13:46,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:46,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:46,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:46,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:13:46,627 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:13:46,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:46,628 INFO L85 PathProgramCache]: Analyzing trace with hash 639380000, now seen corresponding path program 2 times [2024-06-14 12:13:46,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:46,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673484079] [2024-06-14 12:13:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:47,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673484079] [2024-06-14 12:13:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673484079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:13:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156143386] [2024-06-14 12:13:47,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:47,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:13:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:13:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:13:47,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:47,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 100 transitions, 738 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:47,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:47,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:49,227 INFO L124 PetriNetUnfolderBase]: 10835/15132 cut-off events. [2024-06-14 12:13:49,228 INFO L125 PetriNetUnfolderBase]: For 117167/117268 co-relation queries the response was YES. [2024-06-14 12:13:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65379 conditions, 15132 events. 10835/15132 cut-off events. For 117167/117268 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 84154 event pairs, 4561 based on Foata normal form. 36/15047 useless extension candidates. Maximal degree in co-relation 65344. Up to 14235 conditions per place. [2024-06-14 12:13:49,324 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 103 selfloop transitions, 31 changer transitions 0/144 dead transitions. [2024-06-14 12:13:49,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 144 transitions, 1158 flow [2024-06-14 12:13:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:13:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:13:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:13:49,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-14 12:13:49,329 INFO L175 Difference]: Start difference. First operand has 88 places, 100 transitions, 738 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:13:49,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 144 transitions, 1158 flow [2024-06-14 12:13:49,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 144 transitions, 1103 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:49,397 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 802 flow [2024-06-14 12:13:49,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-14 12:13:49,398 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-14 12:13:49,398 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 802 flow [2024-06-14 12:13:49,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:49,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:49,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:49,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:13:49,399 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)] === [2024-06-14 12:13:49,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:49,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2053626144, now seen corresponding path program 1 times [2024-06-14 12:13:49,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:49,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817294823] [2024-06-14 12:13:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:49,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:50,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:50,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817294823] [2024-06-14 12:13:50,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817294823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:50,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:50,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:13:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280106614] [2024-06-14 12:13:50,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:13:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:13:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:13:50,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:50,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 802 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:50,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:50,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:50,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:51,980 INFO L124 PetriNetUnfolderBase]: 10842/15167 cut-off events. [2024-06-14 12:13:51,981 INFO L125 PetriNetUnfolderBase]: For 128339/128447 co-relation queries the response was YES. [2024-06-14 12:13:52,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67320 conditions, 15167 events. 10842/15167 cut-off events. For 128339/128447 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84541 event pairs, 4841 based on Foata normal form. 2/15052 useless extension candidates. Maximal degree in co-relation 67283. Up to 14666 conditions per place. [2024-06-14 12:13:52,069 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 107 selfloop transitions, 14 changer transitions 0/131 dead transitions. [2024-06-14 12:13:52,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 131 transitions, 1152 flow [2024-06-14 12:13:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:13:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:13:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 12:13:52,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 12:13:52,071 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 802 flow. Second operand 6 states and 151 transitions. [2024-06-14 12:13:52,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 131 transitions, 1152 flow [2024-06-14 12:13:52,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1071 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:52,156 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 812 flow [2024-06-14 12:13:52,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=812, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-14 12:13:52,157 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-14 12:13:52,157 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 812 flow [2024-06-14 12:13:52,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:52,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:52,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:52,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:13:52,158 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)] === [2024-06-14 12:13:52,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash -820445252, now seen corresponding path program 1 times [2024-06-14 12:13:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:52,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703941971] [2024-06-14 12:13:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:53,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:53,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703941971] [2024-06-14 12:13:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703941971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:53,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:53,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:53,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351975540] [2024-06-14 12:13:53,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:53,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:53,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:53,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:53,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 812 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) [2024-06-14 12:13:53,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:53,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:53,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:55,197 INFO L124 PetriNetUnfolderBase]: 10900/15221 cut-off events. [2024-06-14 12:13:55,197 INFO L125 PetriNetUnfolderBase]: For 148726/148850 co-relation queries the response was YES. [2024-06-14 12:13:55,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70540 conditions, 15221 events. 10900/15221 cut-off events. For 148726/148850 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84479 event pairs, 4585 based on Foata normal form. 6/15099 useless extension candidates. Maximal degree in co-relation 70502. Up to 14509 conditions per place. [2024-06-14 12:13:55,310 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 109 selfloop transitions, 37 changer transitions 0/156 dead transitions. [2024-06-14 12:13:55,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1290 flow [2024-06-14 12:13:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:13:55,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:13:55,312 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 812 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:13:55,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1290 flow [2024-06-14 12:13:55,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 156 transitions, 1229 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:55,429 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 928 flow [2024-06-14 12:13:55,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=928, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2024-06-14 12:13:55,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-14 12:13:55,430 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 928 flow [2024-06-14 12:13:55,430 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) [2024-06-14 12:13:55,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:55,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:13:55,431 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)] === [2024-06-14 12:13:55,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1646510598, now seen corresponding path program 2 times [2024-06-14 12:13:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624549327] [2024-06-14 12:13:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:56,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:56,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624549327] [2024-06-14 12:13:56,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624549327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:56,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:56,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:56,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873719106] [2024-06-14 12:13:56,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:56,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:56,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:56,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:56,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 928 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) [2024-06-14 12:13:56,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:56,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:56,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:58,483 INFO L124 PetriNetUnfolderBase]: 10885/15204 cut-off events. [2024-06-14 12:13:58,483 INFO L125 PetriNetUnfolderBase]: For 167750/167874 co-relation queries the response was YES. [2024-06-14 12:13:58,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73189 conditions, 15204 events. 10885/15204 cut-off events. For 167750/167874 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 84302 event pairs, 4582 based on Foata normal form. 6/15083 useless extension candidates. Maximal degree in co-relation 73149. Up to 14488 conditions per place. [2024-06-14 12:13:58,619 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 111 selfloop transitions, 45 changer transitions 0/166 dead transitions. [2024-06-14 12:13:58,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 166 transitions, 1472 flow [2024-06-14 12:13:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:13:58,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:13:58,622 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 928 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:13:58,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 166 transitions, 1472 flow [2024-06-14 12:13:58,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 166 transitions, 1352 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:58,769 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1057 flow [2024-06-14 12:13:58,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-14 12:13:58,770 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 12:13:58,770 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1057 flow [2024-06-14 12:13:58,770 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) [2024-06-14 12:13:58,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:58,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:58,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:13:58,771 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)] === [2024-06-14 12:13:58,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:58,771 INFO L85 PathProgramCache]: Analyzing trace with hash 802008314, now seen corresponding path program 3 times [2024-06-14 12:13:58,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:58,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651687985] [2024-06-14 12:13:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:58,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:59,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:59,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651687985] [2024-06-14 12:13:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651687985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:59,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:59,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125150232] [2024-06-14 12:13:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:59,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:59,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:59,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:13:59,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1057 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) [2024-06-14 12:13:59,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:59,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:13:59,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:01,810 INFO L124 PetriNetUnfolderBase]: 10962/15335 cut-off events. [2024-06-14 12:14:01,810 INFO L125 PetriNetUnfolderBase]: For 188054/188178 co-relation queries the response was YES. [2024-06-14 12:14:01,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75956 conditions, 15335 events. 10962/15335 cut-off events. For 188054/188178 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 85476 event pairs, 4128 based on Foata normal form. 6/15213 useless extension candidates. Maximal degree in co-relation 75914. Up to 14327 conditions per place. [2024-06-14 12:14:01,932 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 109 selfloop transitions, 56 changer transitions 0/175 dead transitions. [2024-06-14 12:14:01,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 175 transitions, 1573 flow [2024-06-14 12:14:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:14:01,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:14:01,934 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1057 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:14:01,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 175 transitions, 1573 flow [2024-06-14 12:14:02,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1477 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:02,094 INFO L231 Difference]: Finished difference. Result has 108 places, 131 transitions, 1178 flow [2024-06-14 12:14:02,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1178, PETRI_PLACES=108, PETRI_TRANSITIONS=131} [2024-06-14 12:14:02,095 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 12:14:02,095 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 131 transitions, 1178 flow [2024-06-14 12:14:02,095 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) [2024-06-14 12:14:02,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:02,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:02,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:14:02,096 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:02,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1069096196, now seen corresponding path program 2 times [2024-06-14 12:14:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:02,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383175680] [2024-06-14 12:14:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:02,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383175680] [2024-06-14 12:14:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383175680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:02,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:02,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723326635] [2024-06-14 12:14:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:02,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:02,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 131 transitions, 1178 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:02,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:02,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:02,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:04,484 INFO L124 PetriNetUnfolderBase]: 10955/15357 cut-off events. [2024-06-14 12:14:04,485 INFO L125 PetriNetUnfolderBase]: For 209779/209915 co-relation queries the response was YES. [2024-06-14 12:14:04,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78064 conditions, 15357 events. 10955/15357 cut-off events. For 209779/209915 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 85901 event pairs, 4589 based on Foata normal form. 10/15247 useless extension candidates. Maximal degree in co-relation 78020. Up to 14819 conditions per place. [2024-06-14 12:14:04,610 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 122 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2024-06-14 12:14:04,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 153 transitions, 1572 flow [2024-06-14 12:14:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:04,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:14:04,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 12:14:04,611 INFO L175 Difference]: Start difference. First operand has 108 places, 131 transitions, 1178 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:14:04,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 153 transitions, 1572 flow [2024-06-14 12:14:04,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1437 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:04,755 INFO L231 Difference]: Finished difference. Result has 109 places, 135 transitions, 1164 flow [2024-06-14 12:14:04,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1164, PETRI_PLACES=109, PETRI_TRANSITIONS=135} [2024-06-14 12:14:04,756 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-14 12:14:04,756 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 135 transitions, 1164 flow [2024-06-14 12:14:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:04,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:04,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:04,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:14:04,757 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)] === [2024-06-14 12:14:04,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:04,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1877769698, now seen corresponding path program 1 times [2024-06-14 12:14:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017931714] [2024-06-14 12:14:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:05,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:05,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017931714] [2024-06-14 12:14:05,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017931714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:05,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:05,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042946478] [2024-06-14 12:14:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:05,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:14:05,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 135 transitions, 1164 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) [2024-06-14 12:14:05,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:05,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:14:05,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:07,026 INFO L124 PetriNetUnfolderBase]: 9595/13820 cut-off events. [2024-06-14 12:14:07,026 INFO L125 PetriNetUnfolderBase]: For 202829/202975 co-relation queries the response was YES. [2024-06-14 12:14:07,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71961 conditions, 13820 events. 9595/13820 cut-off events. For 202829/202975 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80395 event pairs, 3819 based on Foata normal form. 4/13644 useless extension candidates. Maximal degree in co-relation 71916. Up to 13035 conditions per place. [2024-06-14 12:14:07,138 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 136 selfloop transitions, 14 changer transitions 0/161 dead transitions. [2024-06-14 12:14:07,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 161 transitions, 1574 flow [2024-06-14 12:14:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:14:07,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:14:07,140 INFO L175 Difference]: Start difference. First operand has 109 places, 135 transitions, 1164 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:14:07,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 161 transitions, 1574 flow [2024-06-14 12:14:07,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1483 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:07,271 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1168 flow [2024-06-14 12:14:07,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1168, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-14 12:14:07,272 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 12:14:07,272 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1168 flow [2024-06-14 12:14:07,272 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) [2024-06-14 12:14:07,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:07,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:07,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:14:07,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:07,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1069102148, now seen corresponding path program 2 times [2024-06-14 12:14:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:07,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764389155] [2024-06-14 12:14:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:07,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:08,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:08,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764389155] [2024-06-14 12:14:08,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764389155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:08,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:08,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769999748] [2024-06-14 12:14:08,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:08,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:08,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:08,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:14:08,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1168 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) [2024-06-14 12:14:08,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:08,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:14:08,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:09,674 INFO L124 PetriNetUnfolderBase]: 9604/13839 cut-off events. [2024-06-14 12:14:09,674 INFO L125 PetriNetUnfolderBase]: For 224286/224454 co-relation queries the response was YES. [2024-06-14 12:14:09,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74962 conditions, 13839 events. 9604/13839 cut-off events. For 224286/224454 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80571 event pairs, 3826 based on Foata normal form. 8/13665 useless extension candidates. Maximal degree in co-relation 74916. Up to 13020 conditions per place. [2024-06-14 12:14:09,783 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 131 selfloop transitions, 21 changer transitions 0/163 dead transitions. [2024-06-14 12:14:09,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 1588 flow [2024-06-14 12:14:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:09,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:14:09,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:14:09,785 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1168 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:14:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 1588 flow [2024-06-14 12:14:09,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 163 transitions, 1523 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:09,897 INFO L231 Difference]: Finished difference. Result has 113 places, 143 transitions, 1220 flow [2024-06-14 12:14:09,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1103, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1220, PETRI_PLACES=113, PETRI_TRANSITIONS=143} [2024-06-14 12:14:09,897 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-14 12:14:09,897 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 143 transitions, 1220 flow [2024-06-14 12:14:09,897 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) [2024-06-14 12:14:09,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:09,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:09,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:14:09,898 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:09,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1567811424, now seen corresponding path program 1 times [2024-06-14 12:14:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894905911] [2024-06-14 12:14:09,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:09,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:10,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:10,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894905911] [2024-06-14 12:14:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894905911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:10,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:10,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229403889] [2024-06-14 12:14:10,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:10,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:10,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:11,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:11,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 143 transitions, 1220 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) [2024-06-14 12:14:11,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:11,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:12,687 INFO L124 PetriNetUnfolderBase]: 10271/14540 cut-off events. [2024-06-14 12:14:12,687 INFO L125 PetriNetUnfolderBase]: For 274048/274048 co-relation queries the response was YES. [2024-06-14 12:14:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82929 conditions, 14540 events. 10271/14540 cut-off events. For 274048/274048 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 81932 event pairs, 4266 based on Foata normal form. 3/14540 useless extension candidates. Maximal degree in co-relation 82882. Up to 13979 conditions per place. [2024-06-14 12:14:12,998 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 138 selfloop transitions, 27 changer transitions 0/172 dead transitions. [2024-06-14 12:14:12,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 172 transitions, 1754 flow [2024-06-14 12:14:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 12:14:13,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-14 12:14:13,002 INFO L175 Difference]: Start difference. First operand has 113 places, 143 transitions, 1220 flow. Second operand 7 states and 173 transitions. [2024-06-14 12:14:13,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 172 transitions, 1754 flow [2024-06-14 12:14:13,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 1667 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:13,136 INFO L231 Difference]: Finished difference. Result has 116 places, 148 transitions, 1275 flow [2024-06-14 12:14:13,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1275, PETRI_PLACES=116, PETRI_TRANSITIONS=148} [2024-06-14 12:14:13,136 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-14 12:14:13,136 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 148 transitions, 1275 flow [2024-06-14 12:14:13,137 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) [2024-06-14 12:14:13,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:13,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:13,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:14:13,137 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:13,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1572316922, now seen corresponding path program 1 times [2024-06-14 12:14:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:13,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527339278] [2024-06-14 12:14:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:13,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:13,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527339278] [2024-06-14 12:14:13,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527339278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:13,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:13,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:13,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110741629] [2024-06-14 12:14:13,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:13,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:13,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:13,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:13,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:14,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:14,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 148 transitions, 1275 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) [2024-06-14 12:14:14,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:14,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:14,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:15,935 INFO L124 PetriNetUnfolderBase]: 11096/15520 cut-off events. [2024-06-14 12:14:15,935 INFO L125 PetriNetUnfolderBase]: For 346707/346780 co-relation queries the response was YES. [2024-06-14 12:14:16,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94256 conditions, 15520 events. 11096/15520 cut-off events. For 346707/346780 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 86106 event pairs, 4679 based on Foata normal form. 11/15410 useless extension candidates. Maximal degree in co-relation 94208. Up to 14821 conditions per place. [2024-06-14 12:14:16,099 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 150 selfloop transitions, 31 changer transitions 0/192 dead transitions. [2024-06-14 12:14:16,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 192 transitions, 1833 flow [2024-06-14 12:14:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:14:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-14 12:14:16,103 INFO L175 Difference]: Start difference. First operand has 116 places, 148 transitions, 1275 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:14:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 192 transitions, 1833 flow [2024-06-14 12:14:16,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 192 transitions, 1727 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:16,284 INFO L231 Difference]: Finished difference. Result has 119 places, 157 transitions, 1369 flow [2024-06-14 12:14:16,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1369, PETRI_PLACES=119, PETRI_TRANSITIONS=157} [2024-06-14 12:14:16,285 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-14 12:14:16,285 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 157 transitions, 1369 flow [2024-06-14 12:14:16,285 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) [2024-06-14 12:14:16,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:16,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:16,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:14:16,286 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)] === [2024-06-14 12:14:16,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1921987090, now seen corresponding path program 1 times [2024-06-14 12:14:16,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:16,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973001194] [2024-06-14 12:14:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:16,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:16,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973001194] [2024-06-14 12:14:17,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973001194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:17,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:17,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:17,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213657558] [2024-06-14 12:14:17,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:17,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:17,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:17,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:17,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 157 transitions, 1369 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:17,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:17,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:17,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:19,507 INFO L124 PetriNetUnfolderBase]: 11350/15917 cut-off events. [2024-06-14 12:14:19,507 INFO L125 PetriNetUnfolderBase]: For 389925/390001 co-relation queries the response was YES. [2024-06-14 12:14:19,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100985 conditions, 15917 events. 11350/15917 cut-off events. For 389925/390001 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 88916 event pairs, 4688 based on Foata normal form. 19/15807 useless extension candidates. Maximal degree in co-relation 100935. Up to 14611 conditions per place. [2024-06-14 12:14:19,689 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 53 changer transitions 0/213 dead transitions. [2024-06-14 12:14:19,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 213 transitions, 2003 flow [2024-06-14 12:14:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:14:19,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-14 12:14:19,690 INFO L175 Difference]: Start difference. First operand has 119 places, 157 transitions, 1369 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:14:19,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 213 transitions, 2003 flow [2024-06-14 12:14:19,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 213 transitions, 1893 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:19,895 INFO L231 Difference]: Finished difference. Result has 124 places, 165 transitions, 1490 flow [2024-06-14 12:14:19,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1490, PETRI_PLACES=124, PETRI_TRANSITIONS=165} [2024-06-14 12:14:19,896 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-14 12:14:19,896 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 165 transitions, 1490 flow [2024-06-14 12:14:19,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:19,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:19,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:19,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:14:19,896 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)] === [2024-06-14 12:14:19,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1229719802, now seen corresponding path program 2 times [2024-06-14 12:14:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:19,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394187472] [2024-06-14 12:14:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:19,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:20,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394187472] [2024-06-14 12:14:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394187472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:20,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:20,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458502453] [2024-06-14 12:14:20,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:20,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:20,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:20,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:20,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:20,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 165 transitions, 1490 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) [2024-06-14 12:14:20,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:20,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:20,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:23,028 INFO L124 PetriNetUnfolderBase]: 11664/16391 cut-off events. [2024-06-14 12:14:23,029 INFO L125 PetriNetUnfolderBase]: For 419573/419664 co-relation queries the response was YES. [2024-06-14 12:14:23,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105268 conditions, 16391 events. 11664/16391 cut-off events. For 419573/419664 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 91930 event pairs, 4746 based on Foata normal form. 19/16278 useless extension candidates. Maximal degree in co-relation 105217. Up to 15433 conditions per place. [2024-06-14 12:14:23,226 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 169 selfloop transitions, 51 changer transitions 0/231 dead transitions. [2024-06-14 12:14:23,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 231 transitions, 2498 flow [2024-06-14 12:14:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 12:14:23,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-14 12:14:23,227 INFO L175 Difference]: Start difference. First operand has 124 places, 165 transitions, 1490 flow. Second operand 8 states and 198 transitions. [2024-06-14 12:14:23,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 231 transitions, 2498 flow [2024-06-14 12:14:23,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 231 transitions, 2398 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:23,594 INFO L231 Difference]: Finished difference. Result has 132 places, 195 transitions, 1905 flow [2024-06-14 12:14:23,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1905, PETRI_PLACES=132, PETRI_TRANSITIONS=195} [2024-06-14 12:14:23,595 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-14 12:14:23,595 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 195 transitions, 1905 flow [2024-06-14 12:14:23,595 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) [2024-06-14 12:14:23,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:23,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:23,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:14:23,596 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)] === [2024-06-14 12:14:23,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2073931910, now seen corresponding path program 3 times [2024-06-14 12:14:23,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:23,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931650249] [2024-06-14 12:14:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:23,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:24,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:24,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931650249] [2024-06-14 12:14:24,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931650249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:24,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:24,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292626448] [2024-06-14 12:14:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:24,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:24,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:24,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 195 transitions, 1905 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) [2024-06-14 12:14:24,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:24,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:24,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:26,967 INFO L124 PetriNetUnfolderBase]: 12164/17122 cut-off events. [2024-06-14 12:14:26,968 INFO L125 PetriNetUnfolderBase]: For 483419/483540 co-relation queries the response was YES. [2024-06-14 12:14:27,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115470 conditions, 17122 events. 12164/17122 cut-off events. For 483419/483540 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 96865 event pairs, 4735 based on Foata normal form. 21/17010 useless extension candidates. Maximal degree in co-relation 115415. Up to 15894 conditions per place. [2024-06-14 12:14:27,181 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 186 selfloop transitions, 84 changer transitions 0/281 dead transitions. [2024-06-14 12:14:27,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 281 transitions, 3321 flow [2024-06-14 12:14:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 12:14:27,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-14 12:14:27,183 INFO L175 Difference]: Start difference. First operand has 132 places, 195 transitions, 1905 flow. Second operand 8 states and 209 transitions. [2024-06-14 12:14:27,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 281 transitions, 3321 flow [2024-06-14 12:14:27,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 281 transitions, 3141 flow, removed 89 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:27,659 INFO L231 Difference]: Finished difference. Result has 141 places, 238 transitions, 2631 flow [2024-06-14 12:14:27,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2631, PETRI_PLACES=141, PETRI_TRANSITIONS=238} [2024-06-14 12:14:27,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-14 12:14:27,660 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 238 transitions, 2631 flow [2024-06-14 12:14:27,660 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) [2024-06-14 12:14:27,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:27,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:27,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:14:27,660 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)] === [2024-06-14 12:14:27,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash 590797344, now seen corresponding path program 1 times [2024-06-14 12:14:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:27,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119792226] [2024-06-14 12:14:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:27,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:28,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:28,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119792226] [2024-06-14 12:14:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119792226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:28,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973781292] [2024-06-14 12:14:28,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:28,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:28,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:14:28,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 238 transitions, 2631 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:28,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:28,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:14:28,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:31,436 INFO L124 PetriNetUnfolderBase]: 12813/17781 cut-off events. [2024-06-14 12:14:31,436 INFO L125 PetriNetUnfolderBase]: For 545185/545185 co-relation queries the response was YES. [2024-06-14 12:14:31,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125212 conditions, 17781 events. 12813/17781 cut-off events. For 545185/545185 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 98653 event pairs, 6087 based on Foata normal form. 3/17781 useless extension candidates. Maximal degree in co-relation 125152. Up to 17332 conditions per place. [2024-06-14 12:14:31,624 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 249 selfloop transitions, 43 changer transitions 0/298 dead transitions. [2024-06-14 12:14:31,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 298 transitions, 3870 flow [2024-06-14 12:14:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 12:14:31,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 12:14:31,626 INFO L175 Difference]: Start difference. First operand has 141 places, 238 transitions, 2631 flow. Second operand 8 states and 200 transitions. [2024-06-14 12:14:31,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 298 transitions, 3870 flow [2024-06-14 12:14:32,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 298 transitions, 3771 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:32,288 INFO L231 Difference]: Finished difference. Result has 149 places, 262 transitions, 3036 flow [2024-06-14 12:14:32,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3036, PETRI_PLACES=149, PETRI_TRANSITIONS=262} [2024-06-14 12:14:32,289 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-14 12:14:32,289 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 262 transitions, 3036 flow [2024-06-14 12:14:32,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:32,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:32,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:32,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:14:32,290 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)] === [2024-06-14 12:14:32,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:32,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1572018020, now seen corresponding path program 2 times [2024-06-14 12:14:32,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:32,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154309289] [2024-06-14 12:14:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:33,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:33,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154309289] [2024-06-14 12:14:33,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154309289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:33,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:33,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:33,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962476706] [2024-06-14 12:14:33,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:33,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:33,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:33,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:14:33,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 262 transitions, 3036 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:33,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:33,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:14:33,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:36,650 INFO L124 PetriNetUnfolderBase]: 12861/17843 cut-off events. [2024-06-14 12:14:36,651 INFO L125 PetriNetUnfolderBase]: For 600145/600145 co-relation queries the response was YES. [2024-06-14 12:14:36,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130817 conditions, 17843 events. 12861/17843 cut-off events. For 600145/600145 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 99043 event pairs, 6087 based on Foata normal form. 3/17843 useless extension candidates. Maximal degree in co-relation 130753. Up to 17361 conditions per place. [2024-06-14 12:14:36,850 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 242 selfloop transitions, 53 changer transitions 0/301 dead transitions. [2024-06-14 12:14:36,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 301 transitions, 4054 flow [2024-06-14 12:14:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 12:14:36,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2024-06-14 12:14:36,852 INFO L175 Difference]: Start difference. First operand has 149 places, 262 transitions, 3036 flow. Second operand 7 states and 174 transitions. [2024-06-14 12:14:36,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 301 transitions, 4054 flow [2024-06-14 12:14:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 301 transitions, 3918 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:37,456 INFO L231 Difference]: Finished difference. Result has 154 places, 272 transitions, 3254 flow [2024-06-14 12:14:37,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3254, PETRI_PLACES=154, PETRI_TRANSITIONS=272} [2024-06-14 12:14:37,456 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-14 12:14:37,456 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 272 transitions, 3254 flow [2024-06-14 12:14:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:37,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:37,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:37,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:14:37,457 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)] === [2024-06-14 12:14:37,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 545695730, now seen corresponding path program 2 times [2024-06-14 12:14:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:37,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030693228] [2024-06-14 12:14:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:38,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030693228] [2024-06-14 12:14:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030693228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:38,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:38,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:38,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255515413] [2024-06-14 12:14:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:38,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:38,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 272 transitions, 3254 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:38,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:38,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:38,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:41,651 INFO L124 PetriNetUnfolderBase]: 12321/17272 cut-off events. [2024-06-14 12:14:41,652 INFO L125 PetriNetUnfolderBase]: For 656926/657256 co-relation queries the response was YES. [2024-06-14 12:14:41,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132087 conditions, 17272 events. 12321/17272 cut-off events. For 656926/657256 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 96990 event pairs, 3495 based on Foata normal form. 19/17124 useless extension candidates. Maximal degree in co-relation 132021. Up to 14912 conditions per place. [2024-06-14 12:14:41,829 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 214 selfloop transitions, 81 changer transitions 0/312 dead transitions. [2024-06-14 12:14:41,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 312 transitions, 3994 flow [2024-06-14 12:14:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:14:41,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-14 12:14:41,830 INFO L175 Difference]: Start difference. First operand has 154 places, 272 transitions, 3254 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:14:41,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 312 transitions, 3994 flow [2024-06-14 12:14:42,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 312 transitions, 3847 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:42,622 INFO L231 Difference]: Finished difference. Result has 158 places, 272 transitions, 3282 flow [2024-06-14 12:14:42,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3282, PETRI_PLACES=158, PETRI_TRANSITIONS=272} [2024-06-14 12:14:42,623 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-14 12:14:42,623 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 272 transitions, 3282 flow [2024-06-14 12:14:42,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:42,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:42,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:42,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:14:42,624 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:42,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1223138692, now seen corresponding path program 3 times [2024-06-14 12:14:42,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:42,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810473319] [2024-06-14 12:14:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:42,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:43,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810473319] [2024-06-14 12:14:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810473319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:43,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205118976] [2024-06-14 12:14:43,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:43,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:43,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:43,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 272 transitions, 3282 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:43,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:43,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:43,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:46,793 INFO L124 PetriNetUnfolderBase]: 12260/17198 cut-off events. [2024-06-14 12:14:46,793 INFO L125 PetriNetUnfolderBase]: For 642855/643185 co-relation queries the response was YES. [2024-06-14 12:14:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130738 conditions, 17198 events. 12260/17198 cut-off events. For 642855/643185 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 96433 event pairs, 2934 based on Foata normal form. 19/17034 useless extension candidates. Maximal degree in co-relation 130670. Up to 14643 conditions per place. [2024-06-14 12:14:46,963 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 210 selfloop transitions, 82 changer transitions 0/309 dead transitions. [2024-06-14 12:14:46,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 309 transitions, 4026 flow [2024-06-14 12:14:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 12:14:46,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-14 12:14:46,965 INFO L175 Difference]: Start difference. First operand has 158 places, 272 transitions, 3282 flow. Second operand 7 states and 183 transitions. [2024-06-14 12:14:46,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 309 transitions, 4026 flow [2024-06-14 12:14:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 309 transitions, 3819 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:47,412 INFO L231 Difference]: Finished difference. Result has 158 places, 273 transitions, 3274 flow [2024-06-14 12:14:47,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3274, PETRI_PLACES=158, PETRI_TRANSITIONS=273} [2024-06-14 12:14:47,417 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-14 12:14:47,417 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 273 transitions, 3274 flow [2024-06-14 12:14:47,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:47,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:47,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:47,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:14:47,418 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:47,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash 772289368, now seen corresponding path program 3 times [2024-06-14 12:14:47,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:47,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471744012] [2024-06-14 12:14:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471744012] [2024-06-14 12:14:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471744012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:48,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:48,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203287566] [2024-06-14 12:14:48,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:48,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:48,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:14:48,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 273 transitions, 3274 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:48,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:48,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:14:48,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:51,490 INFO L124 PetriNetUnfolderBase]: 12820/17784 cut-off events. [2024-06-14 12:14:51,490 INFO L125 PetriNetUnfolderBase]: For 641392/641413 co-relation queries the response was YES. [2024-06-14 12:14:51,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134246 conditions, 17784 events. 12820/17784 cut-off events. For 641392/641413 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 98279 event pairs, 6022 based on Foata normal form. 17/17790 useless extension candidates. Maximal degree in co-relation 134177. Up to 17207 conditions per place. [2024-06-14 12:14:51,697 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 228 selfloop transitions, 79 changer transitions 0/313 dead transitions. [2024-06-14 12:14:51,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 313 transitions, 4492 flow [2024-06-14 12:14:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 12:14:51,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-14 12:14:51,698 INFO L175 Difference]: Start difference. First operand has 158 places, 273 transitions, 3274 flow. Second operand 7 states and 171 transitions. [2024-06-14 12:14:51,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 313 transitions, 4492 flow [2024-06-14 12:14:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 313 transitions, 4289 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:52,271 INFO L231 Difference]: Finished difference. Result has 161 places, 288 transitions, 3619 flow [2024-06-14 12:14:52,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3619, PETRI_PLACES=161, PETRI_TRANSITIONS=288} [2024-06-14 12:14:52,273 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 105 predicate places. [2024-06-14 12:14:52,273 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 288 transitions, 3619 flow [2024-06-14 12:14:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:52,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:52,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:14:52,274 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:14:52,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:52,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1217755352, now seen corresponding path program 4 times [2024-06-14 12:14:52,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:52,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685500228] [2024-06-14 12:14:52,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:52,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:53,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685500228] [2024-06-14 12:14:53,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685500228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:53,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:53,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:53,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8171846] [2024-06-14 12:14:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:53,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:14:53,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 288 transitions, 3619 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) [2024-06-14 12:14:53,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:53,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:14:53,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand