./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix029_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/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix029_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-bcb38a6-m [2024-06-03 19:32:22,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:32:22,216 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:32:22,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:32:22,219 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:32:22,241 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:32:22,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:32:22,242 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:32:22,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:32:22,246 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:32:22,246 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:32:22,246 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:32:22,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:32:22,247 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:32:22,248 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:32:22,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:32:22,248 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:32:22,248 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:32:22,248 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:32:22,248 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:32:22,248 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:32:22,249 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:32:22,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:32:22,249 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:32:22,249 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:32:22,249 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:32:22,249 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:32:22,250 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:32:22,250 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:32:22,250 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:32:22,251 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:32:22,251 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:32:22,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:32:22,251 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:32:22,251 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:32:22,251 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:32:22,252 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:32:22,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:32:22,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:32:22,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:32:22,426 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:32:22,426 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:32:22,427 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-03 19:32:22,620 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:32:22,620 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:32:22,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:32:23,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:32:23,652 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:32:23,654 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:32:23,667 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13454fd1a/4966b0e325d44ea3a404b201c35ed475/FLAG025ce74e9 [2024-06-03 19:32:24,031 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13454fd1a/4966b0e325d44ea3a404b201c35ed475 [2024-06-03 19:32:24,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:32:24,033 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:32:24,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:32:24,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:32:24,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:32:24,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:32:22" (1/2) ... [2024-06-03 19:32:24,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59533bdf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:32:24, skipping insertion in model container [2024-06-03 19:32:24,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:32:22" (1/2) ... [2024-06-03 19:32:24,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1faebc3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:32:24, skipping insertion in model container [2024-06-03 19:32:24,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:32:24" (2/2) ... [2024-06-03 19:32:24,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59533bdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24, skipping insertion in model container [2024-06-03 19:32:24,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:32:24" (2/2) ... [2024-06-03 19:32:24,040 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:32:24,121 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:32:24,122 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! 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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-03 19:32:24,122 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 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)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$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 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-03 19:32:24,122 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! 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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-03 19:32:24,123 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 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)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$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 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-03 19:32:24,123 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:32:24,123 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-03 19:32:24,159 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:32:24,429 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:32:24,444 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:32:24,554 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:32:24,583 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:32:24,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24 WrapperNode [2024-06-03 19:32:24,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:32:24,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:32:24,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:32:24,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:32:24,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,670 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-03 19:32:24,670 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:32:24,671 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:32:24,671 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:32:24,674 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:32:24,682 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,718 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,731 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:32:24,731 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,739 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:32:24,746 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:32:24,747 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:32:24,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:32:24,747 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (1/1) ... [2024-06-03 19:32:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:32:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:32:24,768 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:32:24,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:32:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:32:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:32:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:32:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:32:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:32:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:32:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:32:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:32:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:32:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:32:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:32:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:32:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:32:24,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:32:24,822 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:32:24,949 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:32:24,950 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:32:25,340 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:32:25,340 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:32:25,499 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:32:25,499 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:32:25,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:32:25 BoogieIcfgContainer [2024-06-03 19:32:25,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:32:25,501 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:32:25,501 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:32:25,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:32:25,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:32:22" (1/4) ... [2024-06-03 19:32:25,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65552feb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:32:25, skipping insertion in model container [2024-06-03 19:32:25,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:32:24" (2/4) ... [2024-06-03 19:32:25,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65552feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:32:25, skipping insertion in model container [2024-06-03 19:32:25,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:32:24" (3/4) ... [2024-06-03 19:32:25,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65552feb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:32:25, skipping insertion in model container [2024-06-03 19:32:25,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:32:25" (4/4) ... [2024-06-03 19:32:25,506 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:32:25,519 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:32:25,519 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:32:25,519 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:32:25,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:32:25,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:32:25,605 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:32:25,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:32:25,607 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 89 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. [2024-06-03 19:32:25,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:32:25,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:32:25,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:32:25,626 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;@30508b6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:32:25,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:32:25,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:32:25,632 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:32:25,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:32:25,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:25,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:32:25,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:25,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash -840864292, now seen corresponding path program 1 times [2024-06-03 19:32:25,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:25,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837510503] [2024-06-03 19:32:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:25,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:26,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837510503] [2024-06-03 19:32:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837510503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:26,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:26,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:32:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128474960] [2024-06-03 19:32:26,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:26,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:32:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:26,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:32:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:32:26,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:32:26,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:26,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:26,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:32:26,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:28,097 INFO L124 PetriNetUnfolderBase]: 7775/11128 cut-off events. [2024-06-03 19:32:28,098 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-06-03 19:32:28,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22102 conditions, 11128 events. 7775/11128 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 63923 event pairs, 5733 based on Foata normal form. 1/10784 useless extension candidates. Maximal degree in co-relation 22086. Up to 10609 conditions per place. [2024-06-03 19:32:28,155 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:32:28,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-03 19:32:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:32:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:32:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-03 19:32:28,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-03 19:32:28,166 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-03 19:32:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-03 19:32:28,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:28,170 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:32:28,171 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} [2024-06-03 19:32:28,173 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:32:28,174 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:32:28,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:28,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:28,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:28,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:32:28,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:28,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash -616711301, now seen corresponding path program 1 times [2024-06-03 19:32:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:28,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248181318] [2024-06-03 19:32:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:28,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248181318] [2024-06-03 19:32:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248181318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:28,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:28,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:32:28,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858951351] [2024-06-03 19:32:28,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:32:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:32:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:32:29,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:32:29,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:29,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:29,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:32:29,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:30,298 INFO L124 PetriNetUnfolderBase]: 9097/12638 cut-off events. [2024-06-03 19:32:30,299 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-06-03 19:32:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28723 conditions, 12638 events. 9097/12638 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 69925 event pairs, 5837 based on Foata normal form. 4/12638 useless extension candidates. Maximal degree in co-relation 28708. Up to 12338 conditions per place. [2024-06-03 19:32:30,358 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 19:32:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-03 19:32:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:32:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:32:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-03 19:32:30,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-03 19:32:30,360 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-03 19:32:30,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-03 19:32:30,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:32:30,362 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:32:30,362 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} [2024-06-03 19:32:30,363 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:32:30,363 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:32:30,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:30,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:30,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:30,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:32:30,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:30,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1424458054, now seen corresponding path program 1 times [2024-06-03 19:32:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250340417] [2024-06-03 19:32:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:31,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:31,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250340417] [2024-06-03 19:32:31,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250340417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:31,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:31,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:32:31,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129313765] [2024-06-03 19:32:31,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:31,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:32:31,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:32:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:32:31,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:32:31,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:31,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:31,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:32:31,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:32,939 INFO L124 PetriNetUnfolderBase]: 11555/15929 cut-off events. [2024-06-03 19:32:32,939 INFO L125 PetriNetUnfolderBase]: For 8202/8202 co-relation queries the response was YES. [2024-06-03 19:32:32,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39940 conditions, 15929 events. 11555/15929 cut-off events. For 8202/8202 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86148 event pairs, 5920 based on Foata normal form. 8/15933 useless extension candidates. Maximal degree in co-relation 39923. Up to 15541 conditions per place. [2024-06-03 19:32:33,028 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-03 19:32:33,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 492 flow [2024-06-03 19:32:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-03 19:32:33,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-03 19:32:33,031 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 165 transitions. [2024-06-03 19:32:33,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 492 flow [2024-06-03 19:32:33,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 464 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:32:33,033 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-03 19:32:33,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 19:32:33,034 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-03 19:32:33,034 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-03 19:32:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:33,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:33,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:32:33,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:33,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1224150158, now seen corresponding path program 1 times [2024-06-03 19:32:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:33,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581953723] [2024-06-03 19:32:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:33,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581953723] [2024-06-03 19:32:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581953723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:33,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:33,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:32:33,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843301066] [2024-06-03 19:32:33,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:33,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:32:33,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:33,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:32:33,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:32:34,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:32:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:32:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:35,620 INFO L124 PetriNetUnfolderBase]: 9854/13977 cut-off events. [2024-06-03 19:32:35,620 INFO L125 PetriNetUnfolderBase]: For 13385/13385 co-relation queries the response was YES. [2024-06-03 19:32:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38254 conditions, 13977 events. 9854/13977 cut-off events. For 13385/13385 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78856 event pairs, 5511 based on Foata normal form. 3/13774 useless extension candidates. Maximal degree in co-relation 38235. Up to 13366 conditions per place. [2024-06-03 19:32:35,709 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-03 19:32:35,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 451 flow [2024-06-03 19:32:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:32:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:32:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 19:32:35,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-03 19:32:35,711 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 123 transitions. [2024-06-03 19:32:35,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 451 flow [2024-06-03 19:32:35,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 413 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:35,715 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-03 19:32:35,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:32:35,716 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-03 19:32:35,716 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-03 19:32:35,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:35,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:35,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:35,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:32:35,717 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:35,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash -730179592, now seen corresponding path program 1 times [2024-06-03 19:32:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:35,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446287651] [2024-06-03 19:32:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:35,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446287651] [2024-06-03 19:32:36,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446287651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:36,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:36,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:36,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575088088] [2024-06-03 19:32:36,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:36,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:36,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:36,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:36,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:32:36,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:36,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:36,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:32:36,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:38,192 INFO L124 PetriNetUnfolderBase]: 9836/13953 cut-off events. [2024-06-03 19:32:38,192 INFO L125 PetriNetUnfolderBase]: For 20720/20720 co-relation queries the response was YES. [2024-06-03 19:32:38,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41481 conditions, 13953 events. 9836/13953 cut-off events. For 20720/20720 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78678 event pairs, 5261 based on Foata normal form. 6/13753 useless extension candidates. Maximal degree in co-relation 41460. Up to 13312 conditions per place. [2024-06-03 19:32:38,280 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-03 19:32:38,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 90 transitions, 524 flow [2024-06-03 19:32:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 19:32:38,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-03 19:32:38,282 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 147 transitions. [2024-06-03 19:32:38,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 90 transitions, 524 flow [2024-06-03 19:32:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 90 transitions, 495 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:38,287 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 312 flow [2024-06-03 19:32:38,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-03 19:32:38,288 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-03 19:32:38,288 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 312 flow [2024-06-03 19:32:38,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:38,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:38,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:38,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:32:38,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:38,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:38,289 INFO L85 PathProgramCache]: Analyzing trace with hash -394123943, now seen corresponding path program 1 times [2024-06-03 19:32:38,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:38,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87540850] [2024-06-03 19:32:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:39,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:39,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87540850] [2024-06-03 19:32:39,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87540850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:39,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:39,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426718272] [2024-06-03 19:32:39,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:39,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:39,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:39,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:39,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:39,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:39,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:40,922 INFO L124 PetriNetUnfolderBase]: 11550/15933 cut-off events. [2024-06-03 19:32:40,922 INFO L125 PetriNetUnfolderBase]: For 35783/35795 co-relation queries the response was YES. [2024-06-03 19:32:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51533 conditions, 15933 events. 11550/15933 cut-off events. For 35783/35795 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86253 event pairs, 6273 based on Foata normal form. 11/15938 useless extension candidates. Maximal degree in co-relation 51511. Up to 15550 conditions per place. [2024-06-03 19:32:41,007 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 76 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-03 19:32:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 676 flow [2024-06-03 19:32:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 19:32:41,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-03 19:32:41,011 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 312 flow. Second operand 6 states and 149 transitions. [2024-06-03 19:32:41,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 676 flow [2024-06-03 19:32:41,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 633 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:41,016 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 394 flow [2024-06-03 19:32:41,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-03 19:32:41,017 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-03 19:32:41,017 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 394 flow [2024-06-03 19:32:41,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:41,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:41,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:41,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:32:41,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:41,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash -387660443, now seen corresponding path program 2 times [2024-06-03 19:32:41,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:41,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493914168] [2024-06-03 19:32:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:41,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:41,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493914168] [2024-06-03 19:32:41,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493914168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:41,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:41,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:41,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427784585] [2024-06-03 19:32:41,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:41,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:41,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:41,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:41,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 394 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:41,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:41,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:41,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:43,597 INFO L124 PetriNetUnfolderBase]: 11541/15922 cut-off events. [2024-06-03 19:32:43,597 INFO L125 PetriNetUnfolderBase]: For 49177/49186 co-relation queries the response was YES. [2024-06-03 19:32:43,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 15922 events. 11541/15922 cut-off events. For 49177/49186 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86189 event pairs, 6276 based on Foata normal form. 9/15924 useless extension candidates. Maximal degree in co-relation 55246. Up to 15541 conditions per place. [2024-06-03 19:32:43,682 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2024-06-03 19:32:43,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 638 flow [2024-06-03 19:32:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 19:32:43,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-03 19:32:43,684 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 394 flow. Second operand 6 states and 143 transitions. [2024-06-03 19:32:43,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 638 flow [2024-06-03 19:32:43,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 584 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-03 19:32:43,703 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 393 flow [2024-06-03 19:32:43,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-03 19:32:43,704 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-03 19:32:43,704 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 393 flow [2024-06-03 19:32:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:43,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:43,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:43,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:32:43,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:43,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1081172829, now seen corresponding path program 1 times [2024-06-03 19:32:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:43,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497815348] [2024-06-03 19:32:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:43,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497815348] [2024-06-03 19:32:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497815348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:44,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445521409] [2024-06-03 19:32:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:44,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:44,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:44,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:44,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:44,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:44,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:46,246 INFO L124 PetriNetUnfolderBase]: 11632/16060 cut-off events. [2024-06-03 19:32:46,246 INFO L125 PetriNetUnfolderBase]: For 55882/55886 co-relation queries the response was YES. [2024-06-03 19:32:46,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56300 conditions, 16060 events. 11632/16060 cut-off events. For 55882/55886 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87126 event pairs, 6266 based on Foata normal form. 7/16063 useless extension candidates. Maximal degree in co-relation 56275. Up to 15643 conditions per place. [2024-06-03 19:32:46,350 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 94 selfloop transitions, 32 changer transitions 0/132 dead transitions. [2024-06-03 19:32:46,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 870 flow [2024-06-03 19:32:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 19:32:46,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-03 19:32:46,352 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 393 flow. Second operand 8 states and 192 transitions. [2024-06-03 19:32:46,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 870 flow [2024-06-03 19:32:46,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 796 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:46,371 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 549 flow [2024-06-03 19:32:46,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=549, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2024-06-03 19:32:46,372 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-03 19:32:46,372 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 549 flow [2024-06-03 19:32:46,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:46,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:46,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:46,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:32:46,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:46,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:46,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1800355107, now seen corresponding path program 2 times [2024-06-03 19:32:46,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463468894] [2024-06-03 19:32:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:46,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:47,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463468894] [2024-06-03 19:32:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463468894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:47,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473700522] [2024-06-03 19:32:47,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:47,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:47,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:47,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:47,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:47,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:47,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 549 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:49,233 INFO L124 PetriNetUnfolderBase]: 11654/16114 cut-off events. [2024-06-03 19:32:49,233 INFO L125 PetriNetUnfolderBase]: For 72332/72340 co-relation queries the response was YES. [2024-06-03 19:32:49,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60623 conditions, 16114 events. 11654/16114 cut-off events. For 72332/72340 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87308 event pairs, 6120 based on Foata normal form. 11/16121 useless extension candidates. Maximal degree in co-relation 60596. Up to 15650 conditions per place. [2024-06-03 19:32:49,305 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 94 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2024-06-03 19:32:49,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 134 transitions, 979 flow [2024-06-03 19:32:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 19:32:49,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-03 19:32:49,307 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 549 flow. Second operand 7 states and 169 transitions. [2024-06-03 19:32:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 134 transitions, 979 flow [2024-06-03 19:32:49,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 134 transitions, 917 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:49,326 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 626 flow [2024-06-03 19:32:49,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=626, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-03 19:32:49,327 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-03 19:32:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 626 flow [2024-06-03 19:32:49,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:49,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:49,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:49,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:32:49,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:49,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1800235137, now seen corresponding path program 3 times [2024-06-03 19:32:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:49,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835925797] [2024-06-03 19:32:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:50,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:50,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835925797] [2024-06-03 19:32:50,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835925797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:50,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:50,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:50,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713032289] [2024-06-03 19:32:50,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:50,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:50,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:50,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 626 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:50,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:50,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:50,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:52,151 INFO L124 PetriNetUnfolderBase]: 11676/16151 cut-off events. [2024-06-03 19:32:52,151 INFO L125 PetriNetUnfolderBase]: For 92293/92307 co-relation queries the response was YES. [2024-06-03 19:32:52,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64687 conditions, 16151 events. 11676/16151 cut-off events. For 92293/92307 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87746 event pairs, 6133 based on Foata normal form. 11/16156 useless extension candidates. Maximal degree in co-relation 64659. Up to 15594 conditions per place. [2024-06-03 19:32:52,236 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 84 selfloop transitions, 50 changer transitions 0/140 dead transitions. [2024-06-03 19:32:52,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 140 transitions, 1166 flow [2024-06-03 19:32:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 19:32:52,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-03 19:32:52,237 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 626 flow. Second operand 7 states and 173 transitions. [2024-06-03 19:32:52,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 140 transitions, 1166 flow [2024-06-03 19:32:52,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 140 transitions, 1043 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:52,265 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 736 flow [2024-06-03 19:32:52,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-06-03 19:32:52,266 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-03 19:32:52,266 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 736 flow [2024-06-03 19:32:52,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:52,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:52,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:52,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:32:52,267 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:52,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1800234951, now seen corresponding path program 1 times [2024-06-03 19:32:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:52,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745057875] [2024-06-03 19:32:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:52,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745057875] [2024-06-03 19:32:53,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745057875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:53,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:53,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:53,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57675893] [2024-06-03 19:32:53,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:53,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:53,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:53,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:53,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:53,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:53,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:55,387 INFO L124 PetriNetUnfolderBase]: 11720/16216 cut-off events. [2024-06-03 19:32:55,387 INFO L125 PetriNetUnfolderBase]: For 94104/94121 co-relation queries the response was YES. [2024-06-03 19:32:55,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64975 conditions, 16216 events. 11720/16216 cut-off events. For 94104/94121 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87938 event pairs, 5724 based on Foata normal form. 17/16225 useless extension candidates. Maximal degree in co-relation 64946. Up to 15656 conditions per place. [2024-06-03 19:32:55,503 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 113 selfloop transitions, 35 changer transitions 0/154 dead transitions. [2024-06-03 19:32:55,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 154 transitions, 1308 flow [2024-06-03 19:32:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 19:32:55,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-03 19:32:55,504 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 736 flow. Second operand 7 states and 176 transitions. [2024-06-03 19:32:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 154 transitions, 1308 flow [2024-06-03 19:32:55,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 154 transitions, 1243 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:55,542 INFO L231 Difference]: Finished difference. Result has 87 places, 112 transitions, 848 flow [2024-06-03 19:32:55,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=87, PETRI_TRANSITIONS=112} [2024-06-03 19:32:55,542 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-03 19:32:55,542 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 112 transitions, 848 flow [2024-06-03 19:32:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:55,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:55,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:55,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:32:55,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:55,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:55,543 INFO L85 PathProgramCache]: Analyzing trace with hash 867667189, now seen corresponding path program 2 times [2024-06-03 19:32:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:55,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484165902] [2024-06-03 19:32:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:55,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484165902] [2024-06-03 19:32:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484165902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:56,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:56,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:56,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088159381] [2024-06-03 19:32:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:56,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:56,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 848 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:56,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:56,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:58,524 INFO L124 PetriNetUnfolderBase]: 11764/16275 cut-off events. [2024-06-03 19:32:58,525 INFO L125 PetriNetUnfolderBase]: For 115468/115489 co-relation queries the response was YES. [2024-06-03 19:32:58,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69214 conditions, 16275 events. 11764/16275 cut-off events. For 115468/115489 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88322 event pairs, 5713 based on Foata normal form. 20/16285 useless extension candidates. Maximal degree in co-relation 69183. Up to 15694 conditions per place. [2024-06-03 19:32:58,638 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-03 19:32:58,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 155 transitions, 1384 flow [2024-06-03 19:32:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:32:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:32:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 19:32:58,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-03 19:32:58,639 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 848 flow. Second operand 7 states and 171 transitions. [2024-06-03 19:32:58,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 155 transitions, 1384 flow [2024-06-03 19:32:58,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 155 transitions, 1329 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:58,693 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 936 flow [2024-06-03 19:32:58,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=936, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2024-06-03 19:32:58,694 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-03 19:32:58,694 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 936 flow [2024-06-03 19:32:58,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:58,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:58,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:58,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:32:58,695 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:32:58,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1623103617, now seen corresponding path program 4 times [2024-06-03 19:32:58,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:58,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468167588] [2024-06-03 19:32:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:58,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:59,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:59,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468167588] [2024-06-03 19:32:59,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468167588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:59,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:59,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486978699] [2024-06-03 19:32:59,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:59,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:59,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:59,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:59,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:59,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:32:59,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:59,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:59,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:32:59,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:01,555 INFO L124 PetriNetUnfolderBase]: 11755/16258 cut-off events. [2024-06-03 19:33:01,555 INFO L125 PetriNetUnfolderBase]: For 128592/128597 co-relation queries the response was YES. [2024-06-03 19:33:01,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70551 conditions, 16258 events. 11755/16258 cut-off events. For 128592/128597 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88160 event pairs, 5984 based on Foata normal form. 3/16243 useless extension candidates. Maximal degree in co-relation 70518. Up to 15705 conditions per place. [2024-06-03 19:33:01,671 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 91 selfloop transitions, 50 changer transitions 0/147 dead transitions. [2024-06-03 19:33:01,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1316 flow [2024-06-03 19:33:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 19:33:01,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-03 19:33:01,672 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 936 flow. Second operand 7 states and 167 transitions. [2024-06-03 19:33:01,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1316 flow [2024-06-03 19:33:01,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 147 transitions, 1184 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:01,739 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 915 flow [2024-06-03 19:33:01,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-03 19:33:01,739 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-03 19:33:01,739 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 915 flow [2024-06-03 19:33:01,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:01,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:01,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:01,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:33:01,740 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)] === [2024-06-03 19:33:01,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1623103431, now seen corresponding path program 3 times [2024-06-03 19:33:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:01,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649169888] [2024-06-03 19:33:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:02,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:02,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:02,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649169888] [2024-06-03 19:33:02,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649169888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:02,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:02,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:02,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917592257] [2024-06-03 19:33:02,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:02,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:02,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:02,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:02,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:02,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 915 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:02,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:02,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:02,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:04,530 INFO L124 PetriNetUnfolderBase]: 11737/16239 cut-off events. [2024-06-03 19:33:04,530 INFO L125 PetriNetUnfolderBase]: For 141730/141751 co-relation queries the response was YES. [2024-06-03 19:33:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71428 conditions, 16239 events. 11737/16239 cut-off events. For 141730/141751 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 88157 event pairs, 5710 based on Foata normal form. 20/16249 useless extension candidates. Maximal degree in co-relation 71394. Up to 15667 conditions per place. [2024-06-03 19:33:04,638 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 108 selfloop transitions, 39 changer transitions 0/153 dead transitions. [2024-06-03 19:33:04,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 1331 flow [2024-06-03 19:33:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 19:33:04,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-03 19:33:04,640 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 915 flow. Second operand 7 states and 170 transitions. [2024-06-03 19:33:04,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 1331 flow [2024-06-03 19:33:04,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 153 transitions, 1171 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:04,717 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 844 flow [2024-06-03 19:33:04,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=844, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-03 19:33:04,718 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-03 19:33:04,718 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 844 flow [2024-06-03 19:33:04,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:04,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:04,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:04,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:33:04,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:04,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1622857353, now seen corresponding path program 1 times [2024-06-03 19:33:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:04,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175465257] [2024-06-03 19:33:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:04,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175465257] [2024-06-03 19:33:05,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175465257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:05,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:05,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:05,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867287776] [2024-06-03 19:33:05,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:05,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:05,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:05,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:05,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:06,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:33:06,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:06,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:06,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:33:06,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:07,789 INFO L124 PetriNetUnfolderBase]: 10030/14026 cut-off events. [2024-06-03 19:33:07,789 INFO L125 PetriNetUnfolderBase]: For 133928/133930 co-relation queries the response was YES. [2024-06-03 19:33:07,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63146 conditions, 14026 events. 10030/14026 cut-off events. For 133928/133930 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77313 event pairs, 4745 based on Foata normal form. 6/13882 useless extension candidates. Maximal degree in co-relation 63111. Up to 13549 conditions per place. [2024-06-03 19:33:07,890 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 128 selfloop transitions, 17 changer transitions 0/152 dead transitions. [2024-06-03 19:33:07,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 152 transitions, 1284 flow [2024-06-03 19:33:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 19:33:07,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-03 19:33:07,892 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 844 flow. Second operand 7 states and 170 transitions. [2024-06-03 19:33:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 152 transitions, 1284 flow [2024-06-03 19:33:07,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 152 transitions, 1174 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:07,971 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 832 flow [2024-06-03 19:33:07,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=95, PETRI_TRANSITIONS=119} [2024-06-03 19:33:07,972 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-03 19:33:07,972 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 832 flow [2024-06-03 19:33:07,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:07,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:07,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:07,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:33:07,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:07,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1375221334, now seen corresponding path program 1 times [2024-06-03 19:33:07,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:07,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852739892] [2024-06-03 19:33:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:07,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:08,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852739892] [2024-06-03 19:33:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852739892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:08,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:33:08,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595398745] [2024-06-03 19:33:08,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:08,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:33:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:08,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:33:08,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:33:08,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:33:08,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 119 transitions, 832 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:08,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:08,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:33:08,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:10,411 INFO L124 PetriNetUnfolderBase]: 9418/13779 cut-off events. [2024-06-03 19:33:10,412 INFO L125 PetriNetUnfolderBase]: For 146475/146492 co-relation queries the response was YES. [2024-06-03 19:33:10,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63360 conditions, 13779 events. 9418/13779 cut-off events. For 146475/146492 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81476 event pairs, 4946 based on Foata normal form. 17/13609 useless extension candidates. Maximal degree in co-relation 63324. Up to 12829 conditions per place. [2024-06-03 19:33:10,509 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 112 selfloop transitions, 10 changer transitions 0/137 dead transitions. [2024-06-03 19:33:10,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1162 flow [2024-06-03 19:33:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:33:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:33:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-03 19:33:10,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-03 19:33:10,510 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 832 flow. Second operand 5 states and 123 transitions. [2024-06-03 19:33:10,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1162 flow [2024-06-03 19:33:10,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 1090 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:10,581 INFO L231 Difference]: Finished difference. Result has 95 places, 123 transitions, 839 flow [2024-06-03 19:33:10,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=839, PETRI_PLACES=95, PETRI_TRANSITIONS=123} [2024-06-03 19:33:10,582 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-03 19:33:10,582 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 123 transitions, 839 flow [2024-06-03 19:33:10,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:10,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:10,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:10,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:33:10,583 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:10,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash 23568415, now seen corresponding path program 1 times [2024-06-03 19:33:10,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:10,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986659317] [2024-06-03 19:33:10,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:10,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986659317] [2024-06-03 19:33:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986659317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571816934] [2024-06-03 19:33:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:11,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:11,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:11,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 123 transitions, 839 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:11,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:11,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:11,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:13,668 INFO L124 PetriNetUnfolderBase]: 11759/16296 cut-off events. [2024-06-03 19:33:13,669 INFO L125 PetriNetUnfolderBase]: For 201539/201547 co-relation queries the response was YES. [2024-06-03 19:33:13,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79093 conditions, 16296 events. 11759/16296 cut-off events. For 201539/201547 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88613 event pairs, 5816 based on Foata normal form. 14/16304 useless extension candidates. Maximal degree in co-relation 79056. Up to 15756 conditions per place. [2024-06-03 19:33:13,780 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 129 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-03 19:33:13,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 173 transitions, 1385 flow [2024-06-03 19:33:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 19:33:13,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-03 19:33:13,781 INFO L175 Difference]: Start difference. First operand has 95 places, 123 transitions, 839 flow. Second operand 8 states and 192 transitions. [2024-06-03 19:33:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 173 transitions, 1385 flow [2024-06-03 19:33:13,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 173 transitions, 1336 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 19:33:13,863 INFO L231 Difference]: Finished difference. Result has 100 places, 127 transitions, 946 flow [2024-06-03 19:33:13,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=946, PETRI_PLACES=100, PETRI_TRANSITIONS=127} [2024-06-03 19:33:13,863 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-03 19:33:13,864 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 127 transitions, 946 flow [2024-06-03 19:33:13,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:13,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:13,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:13,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:33:13,864 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:13,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash 27293065, now seen corresponding path program 2 times [2024-06-03 19:33:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579767431] [2024-06-03 19:33:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:13,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:14,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579767431] [2024-06-03 19:33:14,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579767431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:14,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:14,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:14,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833355211] [2024-06-03 19:33:14,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:14,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:14,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:14,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 127 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:14,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:14,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:17,067 INFO L124 PetriNetUnfolderBase]: 11865/16483 cut-off events. [2024-06-03 19:33:17,067 INFO L125 PetriNetUnfolderBase]: For 231874/231885 co-relation queries the response was YES. [2024-06-03 19:33:17,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84070 conditions, 16483 events. 11865/16483 cut-off events. For 231874/231885 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89894 event pairs, 5384 based on Foata normal form. 10/16485 useless extension candidates. Maximal degree in co-relation 84032. Up to 15541 conditions per place. [2024-06-03 19:33:17,187 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 107 selfloop transitions, 76 changer transitions 0/189 dead transitions. [2024-06-03 19:33:17,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 189 transitions, 1850 flow [2024-06-03 19:33:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 19:33:17,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-03 19:33:17,189 INFO L175 Difference]: Start difference. First operand has 100 places, 127 transitions, 946 flow. Second operand 8 states and 205 transitions. [2024-06-03 19:33:17,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 189 transitions, 1850 flow [2024-06-03 19:33:17,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 189 transitions, 1728 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:17,305 INFO L231 Difference]: Finished difference. Result has 102 places, 139 transitions, 1199 flow [2024-06-03 19:33:17,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=102, PETRI_TRANSITIONS=139} [2024-06-03 19:33:17,305 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-03 19:33:17,305 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 139 transitions, 1199 flow [2024-06-03 19:33:17,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:17,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:17,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:17,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:33:17,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:17,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:17,306 INFO L85 PathProgramCache]: Analyzing trace with hash 27287485, now seen corresponding path program 3 times [2024-06-03 19:33:17,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:17,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562543602] [2024-06-03 19:33:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:17,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:18,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562543602] [2024-06-03 19:33:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562543602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:18,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:18,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836834683] [2024-06-03 19:33:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:18,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:18,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:18,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 139 transitions, 1199 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:18,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:18,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:18,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:20,534 INFO L124 PetriNetUnfolderBase]: 11847/16459 cut-off events. [2024-06-03 19:33:20,534 INFO L125 PetriNetUnfolderBase]: For 265868/265879 co-relation queries the response was YES. [2024-06-03 19:33:20,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87672 conditions, 16459 events. 11847/16459 cut-off events. For 265868/265879 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89915 event pairs, 5392 based on Foata normal form. 10/16461 useless extension candidates. Maximal degree in co-relation 87633. Up to 15526 conditions per place. [2024-06-03 19:33:20,666 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 107 selfloop transitions, 74 changer transitions 0/187 dead transitions. [2024-06-03 19:33:20,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 187 transitions, 1803 flow [2024-06-03 19:33:20,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 19:33:20,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-03 19:33:20,668 INFO L175 Difference]: Start difference. First operand has 102 places, 139 transitions, 1199 flow. Second operand 8 states and 204 transitions. [2024-06-03 19:33:20,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 187 transitions, 1803 flow [2024-06-03 19:33:20,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 187 transitions, 1664 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-03 19:33:20,859 INFO L231 Difference]: Finished difference. Result has 107 places, 139 transitions, 1219 flow [2024-06-03 19:33:20,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1219, PETRI_PLACES=107, PETRI_TRANSITIONS=139} [2024-06-03 19:33:20,859 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-03 19:33:20,859 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 139 transitions, 1219 flow [2024-06-03 19:33:20,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:20,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:20,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:20,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:33:20,860 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:20,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1702347361, now seen corresponding path program 4 times [2024-06-03 19:33:20,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:20,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146157566] [2024-06-03 19:33:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:20,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:21,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:21,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146157566] [2024-06-03 19:33:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146157566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:21,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:21,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865425850] [2024-06-03 19:33:21,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:21,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:21,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 139 transitions, 1219 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:21,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:21,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:21,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:24,058 INFO L124 PetriNetUnfolderBase]: 11953/16616 cut-off events. [2024-06-03 19:33:24,058 INFO L125 PetriNetUnfolderBase]: For 289897/289902 co-relation queries the response was YES. [2024-06-03 19:33:24,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90206 conditions, 16616 events. 11953/16616 cut-off events. For 289897/289902 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90674 event pairs, 5385 based on Foata normal form. 6/16604 useless extension candidates. Maximal degree in co-relation 90165. Up to 15617 conditions per place. [2024-06-03 19:33:24,191 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 107 selfloop transitions, 82 changer transitions 0/195 dead transitions. [2024-06-03 19:33:24,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 195 transitions, 2117 flow [2024-06-03 19:33:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:33:24,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-03 19:33:24,193 INFO L175 Difference]: Start difference. First operand has 107 places, 139 transitions, 1219 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:33:24,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 195 transitions, 2117 flow [2024-06-03 19:33:24,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1928 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:24,310 INFO L231 Difference]: Finished difference. Result has 108 places, 147 transitions, 1373 flow [2024-06-03 19:33:24,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1373, PETRI_PLACES=108, PETRI_TRANSITIONS=147} [2024-06-03 19:33:24,310 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-03 19:33:24,310 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 147 transitions, 1373 flow [2024-06-03 19:33:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:24,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:24,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:24,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:33:24,311 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:24,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1230754539, now seen corresponding path program 5 times [2024-06-03 19:33:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:24,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249147705] [2024-06-03 19:33:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:24,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:25,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:25,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249147705] [2024-06-03 19:33:25,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249147705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:25,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:25,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:25,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155962249] [2024-06-03 19:33:25,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:25,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:25,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:25,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:25,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:25,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:25,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 147 transitions, 1373 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:25,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:25,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:25,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:27,602 INFO L124 PetriNetUnfolderBase]: 11935/16592 cut-off events. [2024-06-03 19:33:27,602 INFO L125 PetriNetUnfolderBase]: For 310291/310296 co-relation queries the response was YES. [2024-06-03 19:33:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91119 conditions, 16592 events. 11935/16592 cut-off events. For 310291/310296 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90563 event pairs, 5393 based on Foata normal form. 6/16580 useless extension candidates. Maximal degree in co-relation 91077. Up to 15602 conditions per place. [2024-06-03 19:33:27,740 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 99 selfloop transitions, 86 changer transitions 0/191 dead transitions. [2024-06-03 19:33:27,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 191 transitions, 1987 flow [2024-06-03 19:33:27,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 19:33:27,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-03 19:33:27,741 INFO L175 Difference]: Start difference. First operand has 108 places, 147 transitions, 1373 flow. Second operand 8 states and 197 transitions. [2024-06-03 19:33:27,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 191 transitions, 1987 flow [2024-06-03 19:33:27,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 191 transitions, 1696 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:27,913 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1265 flow [2024-06-03 19:33:27,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-03 19:33:27,914 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-03 19:33:27,914 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1265 flow [2024-06-03 19:33:27,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:27,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:27,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:27,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:33:27,914 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:27,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1453126809, now seen corresponding path program 6 times [2024-06-03 19:33:27,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:27,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582050109] [2024-06-03 19:33:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:28,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582050109] [2024-06-03 19:33:28,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582050109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:28,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:28,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994106442] [2024-06-03 19:33:28,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:28,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:28,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:29,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:29,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1265 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:29,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:29,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:29,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:31,100 INFO L124 PetriNetUnfolderBase]: 11917/16568 cut-off events. [2024-06-03 19:33:31,100 INFO L125 PetriNetUnfolderBase]: For 328762/328767 co-relation queries the response was YES. [2024-06-03 19:33:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91690 conditions, 16568 events. 11917/16568 cut-off events. For 328762/328767 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90409 event pairs, 5382 based on Foata normal form. 6/16556 useless extension candidates. Maximal degree in co-relation 91647. Up to 15587 conditions per place. [2024-06-03 19:33:31,237 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 100 selfloop transitions, 83 changer transitions 0/189 dead transitions. [2024-06-03 19:33:31,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 189 transitions, 1759 flow [2024-06-03 19:33:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 19:33:31,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-03 19:33:31,239 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1265 flow. Second operand 8 states and 196 transitions. [2024-06-03 19:33:31,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 189 transitions, 1759 flow [2024-06-03 19:33:31,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 1516 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:31,402 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1199 flow [2024-06-03 19:33:31,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-06-03 19:33:31,403 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-03 19:33:31,403 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1199 flow [2024-06-03 19:33:31,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:31,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:31,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:31,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:33:31,403 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)] === [2024-06-03 19:33:31,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:31,404 INFO L85 PathProgramCache]: Analyzing trace with hash -317810076, now seen corresponding path program 1 times [2024-06-03 19:33:31,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:31,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648178738] [2024-06-03 19:33:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:31,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:32,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:32,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648178738] [2024-06-03 19:33:32,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648178738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:32,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:32,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:33:32,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441247247] [2024-06-03 19:33:32,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:33:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:33:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:33:32,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:33:32,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1199 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:32,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:32,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:33:32,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:34,074 INFO L124 PetriNetUnfolderBase]: 11165/15782 cut-off events. [2024-06-03 19:33:34,074 INFO L125 PetriNetUnfolderBase]: For 344116/344157 co-relation queries the response was YES. [2024-06-03 19:33:34,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89420 conditions, 15782 events. 11165/15782 cut-off events. For 344116/344157 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 89089 event pairs, 5719 based on Foata normal form. 18/15748 useless extension candidates. Maximal degree in co-relation 89376. Up to 15139 conditions per place. [2024-06-03 19:33:34,208 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 145 selfloop transitions, 22 changer transitions 0/181 dead transitions. [2024-06-03 19:33:34,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 181 transitions, 1811 flow [2024-06-03 19:33:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:33:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:33:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 19:33:34,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-03 19:33:34,209 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1199 flow. Second operand 6 states and 145 transitions. [2024-06-03 19:33:34,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 181 transitions, 1811 flow [2024-06-03 19:33:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1634 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:34,436 INFO L231 Difference]: Finished difference. Result has 113 places, 161 transitions, 1244 flow [2024-06-03 19:33:34,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1244, PETRI_PLACES=113, PETRI_TRANSITIONS=161} [2024-06-03 19:33:34,437 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-03 19:33:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 161 transitions, 1244 flow [2024-06-03 19:33:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:34,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:34,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:34,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:33:34,437 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash 727760860, now seen corresponding path program 1 times [2024-06-03 19:33:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811597512] [2024-06-03 19:33:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:35,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:35,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811597512] [2024-06-03 19:33:35,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811597512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:35,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:35,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:35,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264434892] [2024-06-03 19:33:35,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:35,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:35,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:35,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:35,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:35,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 161 transitions, 1244 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:35,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:35,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:35,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:38,052 INFO L124 PetriNetUnfolderBase]: 12425/17317 cut-off events. [2024-06-03 19:33:38,053 INFO L125 PetriNetUnfolderBase]: For 407559/407687 co-relation queries the response was YES. [2024-06-03 19:33:38,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101585 conditions, 17317 events. 12425/17317 cut-off events. For 407559/407687 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95283 event pairs, 4759 based on Foata normal form. 14/17281 useless extension candidates. Maximal degree in co-relation 101538. Up to 16452 conditions per place. [2024-06-03 19:33:38,179 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 172 selfloop transitions, 43 changer transitions 0/224 dead transitions. [2024-06-03 19:33:38,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 224 transitions, 2120 flow [2024-06-03 19:33:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 19:33:38,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549266247379455 [2024-06-03 19:33:38,180 INFO L175 Difference]: Start difference. First operand has 113 places, 161 transitions, 1244 flow. Second operand 9 states and 217 transitions. [2024-06-03 19:33:38,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 224 transitions, 2120 flow [2024-06-03 19:33:38,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 224 transitions, 2074 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-03 19:33:38,440 INFO L231 Difference]: Finished difference. Result has 121 places, 167 transitions, 1436 flow [2024-06-03 19:33:38,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1436, PETRI_PLACES=121, PETRI_TRANSITIONS=167} [2024-06-03 19:33:38,441 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-03 19:33:38,441 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 167 transitions, 1436 flow [2024-06-03 19:33:38,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:38,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:38,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:38,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:33:38,441 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:38,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash 841440340, now seen corresponding path program 2 times [2024-06-03 19:33:38,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:38,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660122052] [2024-06-03 19:33:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:39,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660122052] [2024-06-03 19:33:39,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660122052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:39,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:39,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717697382] [2024-06-03 19:33:39,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:39,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:39,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 167 transitions, 1436 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:39,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:39,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:39,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:42,063 INFO L124 PetriNetUnfolderBase]: 12410/17296 cut-off events. [2024-06-03 19:33:42,063 INFO L125 PetriNetUnfolderBase]: For 447750/447878 co-relation queries the response was YES. [2024-06-03 19:33:42,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104505 conditions, 17296 events. 12410/17296 cut-off events. For 447750/447878 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95107 event pairs, 5571 based on Foata normal form. 14/17260 useless extension candidates. Maximal degree in co-relation 104455. Up to 16538 conditions per place. [2024-06-03 19:33:42,203 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 167 selfloop transitions, 37 changer transitions 0/213 dead transitions. [2024-06-03 19:33:42,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 213 transitions, 1996 flow [2024-06-03 19:33:42,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 19:33:42,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45047169811320753 [2024-06-03 19:33:42,204 INFO L175 Difference]: Start difference. First operand has 121 places, 167 transitions, 1436 flow. Second operand 8 states and 191 transitions. [2024-06-03 19:33:42,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 213 transitions, 1996 flow [2024-06-03 19:33:42,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 213 transitions, 1835 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:42,471 INFO L231 Difference]: Finished difference. Result has 124 places, 167 transitions, 1360 flow [2024-06-03 19:33:42,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=124, PETRI_TRANSITIONS=167} [2024-06-03 19:33:42,471 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-03 19:33:42,471 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 167 transitions, 1360 flow [2024-06-03 19:33:42,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:42,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:42,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:42,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:33:42,472 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:42,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1301722294, now seen corresponding path program 3 times [2024-06-03 19:33:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264692983] [2024-06-03 19:33:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:42,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264692983] [2024-06-03 19:33:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264692983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:43,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547740389] [2024-06-03 19:33:43,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:43,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:43,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 167 transitions, 1360 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:43,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:43,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:43,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:46,024 INFO L124 PetriNetUnfolderBase]: 12446/17347 cut-off events. [2024-06-03 19:33:46,024 INFO L125 PetriNetUnfolderBase]: For 477832/477960 co-relation queries the response was YES. [2024-06-03 19:33:46,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105863 conditions, 17347 events. 12446/17347 cut-off events. For 477832/477960 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 95503 event pairs, 5584 based on Foata normal form. 10/17305 useless extension candidates. Maximal degree in co-relation 105811. Up to 16515 conditions per place. [2024-06-03 19:33:46,192 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 53 changer transitions 0/211 dead transitions. [2024-06-03 19:33:46,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 211 transitions, 1966 flow [2024-06-03 19:33:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:46,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 19:33:46,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-03 19:33:46,193 INFO L175 Difference]: Start difference. First operand has 124 places, 167 transitions, 1360 flow. Second operand 8 states and 192 transitions. [2024-06-03 19:33:46,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 211 transitions, 1966 flow [2024-06-03 19:33:46,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 211 transitions, 1882 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:46,479 INFO L231 Difference]: Finished difference. Result has 125 places, 170 transitions, 1472 flow [2024-06-03 19:33:46,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1472, PETRI_PLACES=125, PETRI_TRANSITIONS=170} [2024-06-03 19:33:46,480 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-03 19:33:46,480 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 170 transitions, 1472 flow [2024-06-03 19:33:46,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:46,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:46,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:33:46,481 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)] === [2024-06-03 19:33:46,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash 846093688, now seen corresponding path program 1 times [2024-06-03 19:33:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:46,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172370912] [2024-06-03 19:33:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:48,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:48,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172370912] [2024-06-03 19:33:48,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172370912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:48,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:48,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:33:48,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520483568] [2024-06-03 19:33:48,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:48,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:33:48,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:33:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:33:48,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:48,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 170 transitions, 1472 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:48,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:48,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:48,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:50,806 INFO L124 PetriNetUnfolderBase]: 12563/17485 cut-off events. [2024-06-03 19:33:50,807 INFO L125 PetriNetUnfolderBase]: For 525350/525487 co-relation queries the response was YES. [2024-06-03 19:33:50,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109791 conditions, 17485 events. 12563/17485 cut-off events. For 525350/525487 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95989 event pairs, 5293 based on Foata normal form. 18/17434 useless extension candidates. Maximal degree in co-relation 109738. Up to 16662 conditions per place. [2024-06-03 19:33:50,979 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 169 selfloop transitions, 42 changer transitions 0/220 dead transitions. [2024-06-03 19:33:50,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 220 transitions, 2118 flow [2024-06-03 19:33:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 19:33:50,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-03 19:33:50,980 INFO L175 Difference]: Start difference. First operand has 125 places, 170 transitions, 1472 flow. Second operand 8 states and 195 transitions. [2024-06-03 19:33:50,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 220 transitions, 2118 flow [2024-06-03 19:33:51,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 220 transitions, 1948 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:51,480 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1474 flow [2024-06-03 19:33:51,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1474, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-06-03 19:33:51,480 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-03 19:33:51,481 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1474 flow [2024-06-03 19:33:51,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:51,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:51,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:51,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:33:51,481 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:51,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:51,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1273617931, now seen corresponding path program 1 times [2024-06-03 19:33:51,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:51,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049816598] [2024-06-03 19:33:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:51,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049816598] [2024-06-03 19:33:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049816598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:52,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:52,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:33:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920117134] [2024-06-03 19:33:52,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:52,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:33:52,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:33:52,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:33:52,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:33:52,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1474 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:52,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:52,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:33:52,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:54,913 INFO L124 PetriNetUnfolderBase]: 11891/16781 cut-off events. [2024-06-03 19:33:54,914 INFO L125 PetriNetUnfolderBase]: For 560891/561060 co-relation queries the response was YES. [2024-06-03 19:33:54,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109130 conditions, 16781 events. 11891/16781 cut-off events. For 560891/561060 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 94855 event pairs, 5503 based on Foata normal form. 19/16699 useless extension candidates. Maximal degree in co-relation 109076. Up to 15849 conditions per place. [2024-06-03 19:33:55,077 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 154 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-03 19:33:55,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 200 transitions, 1976 flow [2024-06-03 19:33:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:33:55,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:33:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 19:33:55,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4559748427672956 [2024-06-03 19:33:55,079 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1474 flow. Second operand 6 states and 145 transitions. [2024-06-03 19:33:55,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 200 transitions, 1976 flow [2024-06-03 19:33:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 200 transitions, 1830 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:55,374 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 1471 flow [2024-06-03 19:33:55,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1471, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-03 19:33:55,375 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-03 19:33:55,375 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 1471 flow [2024-06-03 19:33:55,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:55,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:55,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:55,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:33:55,375 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:55,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:55,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2097261164, now seen corresponding path program 4 times [2024-06-03 19:33:55,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:55,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691509035] [2024-06-03 19:33:55,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:55,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:56,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:56,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691509035] [2024-06-03 19:33:56,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691509035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:56,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:56,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:56,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88863674] [2024-06-03 19:33:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:56,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:56,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:56,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:56,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:33:56,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 1471 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:56,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:56,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:33:56,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:59,248 INFO L124 PetriNetUnfolderBase]: 12580/17506 cut-off events. [2024-06-03 19:33:59,248 INFO L125 PetriNetUnfolderBase]: For 604271/604430 co-relation queries the response was YES. [2024-06-03 19:33:59,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116073 conditions, 17506 events. 12580/17506 cut-off events. For 604271/604430 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96081 event pairs, 5544 based on Foata normal form. 6/17430 useless extension candidates. Maximal degree in co-relation 116018. Up to 16697 conditions per place. [2024-06-03 19:33:59,567 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 157 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-03 19:33:59,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 219 transitions, 2099 flow [2024-06-03 19:33:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:33:59,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:33:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 19:33:59,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44575471698113206 [2024-06-03 19:33:59,568 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 1471 flow. Second operand 8 states and 189 transitions. [2024-06-03 19:33:59,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 219 transitions, 2099 flow [2024-06-03 19:33:59,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2000 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:59,899 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1580 flow [2024-06-03 19:33:59,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1580, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-03 19:33:59,900 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-03 19:33:59,900 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1580 flow [2024-06-03 19:33:59,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:33:59,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:59,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:59,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:33:59,901 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:33:59,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1869175316, now seen corresponding path program 2 times [2024-06-03 19:33:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:59,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708714027] [2024-06-03 19:33:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:01,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:01,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708714027] [2024-06-03 19:34:01,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708714027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:01,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74799547] [2024-06-03 19:34:01,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:01,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:01,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:34:01,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1580 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:01,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:01,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:34:01,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:04,437 INFO L124 PetriNetUnfolderBase]: 12616/17563 cut-off events. [2024-06-03 19:34:04,438 INFO L125 PetriNetUnfolderBase]: For 654523/654698 co-relation queries the response was YES. [2024-06-03 19:34:04,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119471 conditions, 17563 events. 12616/17563 cut-off events. For 654523/654698 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96334 event pairs, 5249 based on Foata normal form. 20/17509 useless extension candidates. Maximal degree in co-relation 119415. Up to 16735 conditions per place. [2024-06-03 19:34:04,581 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 175 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-06-03 19:34:04,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 227 transitions, 2244 flow [2024-06-03 19:34:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 19:34:04,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481132075471698 [2024-06-03 19:34:04,582 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1580 flow. Second operand 8 states and 190 transitions. [2024-06-03 19:34:04,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 227 transitions, 2244 flow [2024-06-03 19:34:04,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 227 transitions, 2062 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:04,872 INFO L231 Difference]: Finished difference. Result has 133 places, 183 transitions, 1584 flow [2024-06-03 19:34:04,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1584, PETRI_PLACES=133, PETRI_TRANSITIONS=183} [2024-06-03 19:34:04,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-03 19:34:04,873 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 183 transitions, 1584 flow [2024-06-03 19:34:04,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:04,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:04,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:04,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:34:04,873 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:34:04,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2097076466, now seen corresponding path program 3 times [2024-06-03 19:34:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:04,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592630411] [2024-06-03 19:34:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:06,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:06,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592630411] [2024-06-03 19:34:06,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592630411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:06,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:06,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897495129] [2024-06-03 19:34:06,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:06,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:06,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:06,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:06,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:06,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:34:06,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 183 transitions, 1584 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:06,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:06,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:34:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:09,280 INFO L124 PetriNetUnfolderBase]: 12652/17615 cut-off events. [2024-06-03 19:34:09,281 INFO L125 PetriNetUnfolderBase]: For 703010/703185 co-relation queries the response was YES. [2024-06-03 19:34:09,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122717 conditions, 17615 events. 12652/17615 cut-off events. For 703010/703185 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96557 event pairs, 5257 based on Foata normal form. 20/17561 useless extension candidates. Maximal degree in co-relation 122660. Up to 16787 conditions per place. [2024-06-03 19:34:09,427 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 42 changer transitions 0/231 dead transitions. [2024-06-03 19:34:09,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 231 transitions, 2264 flow [2024-06-03 19:34:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 19:34:09,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-03 19:34:09,429 INFO L175 Difference]: Start difference. First operand has 133 places, 183 transitions, 1584 flow. Second operand 8 states and 192 transitions. [2024-06-03 19:34:09,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 231 transitions, 2264 flow [2024-06-03 19:34:09,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 231 transitions, 2104 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:09,740 INFO L231 Difference]: Finished difference. Result has 135 places, 186 transitions, 1614 flow [2024-06-03 19:34:09,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1614, PETRI_PLACES=135, PETRI_TRANSITIONS=186} [2024-06-03 19:34:09,741 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-03 19:34:09,741 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 186 transitions, 1614 flow [2024-06-03 19:34:09,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:09,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:09,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:09,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:34:09,741 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:34:09,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1860604436, now seen corresponding path program 4 times [2024-06-03 19:34:09,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:09,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531350616] [2024-06-03 19:34:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:09,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:11,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:11,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531350616] [2024-06-03 19:34:11,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531350616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:11,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:11,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:11,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682038702] [2024-06-03 19:34:11,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:11,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:34:11,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 186 transitions, 1614 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:11,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:11,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:34:11,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:14,149 INFO L124 PetriNetUnfolderBase]: 12637/17594 cut-off events. [2024-06-03 19:34:14,149 INFO L125 PetriNetUnfolderBase]: For 749289/749464 co-relation queries the response was YES. [2024-06-03 19:34:14,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125179 conditions, 17594 events. 12637/17594 cut-off events. For 749289/749464 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 96606 event pairs, 4994 based on Foata normal form. 20/17540 useless extension candidates. Maximal degree in co-relation 125121. Up to 16638 conditions per place. [2024-06-03 19:34:14,309 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 170 selfloop transitions, 54 changer transitions 0/233 dead transitions. [2024-06-03 19:34:14,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 233 transitions, 2302 flow [2024-06-03 19:34:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 19:34:14,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481132075471698 [2024-06-03 19:34:14,310 INFO L175 Difference]: Start difference. First operand has 135 places, 186 transitions, 1614 flow. Second operand 8 states and 190 transitions. [2024-06-03 19:34:14,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 233 transitions, 2302 flow [2024-06-03 19:34:14,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 233 transitions, 2138 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:14,686 INFO L231 Difference]: Finished difference. Result has 137 places, 189 transitions, 1670 flow [2024-06-03 19:34:14,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1670, PETRI_PLACES=137, PETRI_TRANSITIONS=189} [2024-06-03 19:34:14,686 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-03 19:34:14,686 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 189 transitions, 1670 flow [2024-06-03 19:34:14,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:14,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:14,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:14,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:34:14,687 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:34:14,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1262190091, now seen corresponding path program 2 times [2024-06-03 19:34:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:14,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544681478] [2024-06-03 19:34:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:15,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544681478] [2024-06-03 19:34:15,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544681478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:15,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:15,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:34:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523214387] [2024-06-03 19:34:15,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:15,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:34:15,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:15,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:34:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:34:15,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:34:15,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 189 transitions, 1670 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:15,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:15,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:34:15,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand