./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix039.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/mix039.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/mix039.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix039.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:13:12,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:13:12,219 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:13:12,222 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:13:12,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:13:12,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:13:12,247 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:13:12,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:13:12,248 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:13:12,248 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:13:12,249 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:13:12,249 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:13:12,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:13:12,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:13:12,250 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:13:12,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:13:12,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:13:12,251 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:13:12,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:13:12,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:13:12,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:13:12,252 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:13:12,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:13:12,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:13:12,252 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:13:12,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:13:12,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:13:12,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:13:12,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:13:12,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:13:12,253 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:13:12,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:13:12,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:13:12,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:13:12,254 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:13:12,254 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:13:12,255 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:13:12,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:13:12,255 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:13:12,255 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:13:12,255 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:13:12,255 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:13:12,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:13:12,256 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:13:12,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:13:12,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:13:12,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:13:12,480 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:13:12,481 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:13:12,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix039.opt.yml/witness.yml [2024-06-04 15:13:12,667 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:13:12,669 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:13:12,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-04 15:13:13,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:13:13,874 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:13:13,875 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-04 15:13:13,887 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f5ba19c7/1bd1429f506f4fd3ac5f29d1ff24dedc/FLAGdb2fd8fe0 [2024-06-04 15:13:14,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f5ba19c7/1bd1429f506f4fd3ac5f29d1ff24dedc [2024-06-04 15:13:14,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:13:14,273 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:13:14,274 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:13:14,274 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:13:14,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:13:14,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:13:12" (1/2) ... [2024-06-04 15:13:14,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab462a1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:13:14, skipping insertion in model container [2024-06-04 15:13:14,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:13:12" (1/2) ... [2024-06-04 15:13:14,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20ca0ef3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:13:14, skipping insertion in model container [2024-06-04 15:13:14,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:13:14" (2/2) ... [2024-06-04 15:13:14,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab462a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14, skipping insertion in model container [2024-06-04 15:13:14,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:13:14" (2/2) ... [2024-06-04 15:13:14,284 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:13:14,405 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:13:14,406 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-04 15:13:14,406 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-04 15:13:14,406 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-04 15:13:14,406 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-04 15:13:14,406 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:13:14,407 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-04 15:13:14,440 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:13:14,702 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:13:14,709 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:13:14,828 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:13:14,861 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:13:14,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14 WrapperNode [2024-06-04 15:13:14,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:13:14,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:13:14,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:13:14,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:13:14,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,913 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-04 15:13:14,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:13:14,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:13:14,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:13:14,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:13:14,922 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,937 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 15:13:14,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,938 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,945 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,946 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,952 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:13:14,953 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:13:14,953 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:13:14,953 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:13:14,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (1/1) ... [2024-06-04 15:13:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:13:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:13:14,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 15:13:15,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 15:13:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:13:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:13:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:13:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:13:15,026 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:13:15,026 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:13:15,026 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:13:15,027 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:13:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 15:13:15,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 15:13:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:13:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:13:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:13:15,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:13:15,030 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:13:15,133 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:13:15,135 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:13:15,485 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:13:15,485 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:13:15,579 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:13:15,579 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:13:15,580 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:13:15 BoogieIcfgContainer [2024-06-04 15:13:15,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:13:15,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:13:15,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:13:15,583 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:13:15,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:13:12" (1/4) ... [2024-06-04 15:13:15,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42384e2a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:13:15, skipping insertion in model container [2024-06-04 15:13:15,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:13:14" (2/4) ... [2024-06-04 15:13:15,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42384e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:13:15, skipping insertion in model container [2024-06-04 15:13:15,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:13:14" (3/4) ... [2024-06-04 15:13:15,585 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42384e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:13:15, skipping insertion in model container [2024-06-04 15:13:15,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:13:15" (4/4) ... [2024-06-04 15:13:15,586 INFO L112 eAbstractionObserver]: Analyzing ICFG mix039.opt.i [2024-06-04 15:13:15,599 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:13:15,599 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 15:13:15,599 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:13:15,636 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:13:15,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 15:13:15,689 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 15:13:15,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:13:15,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:13:15,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 15:13:15,694 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 15:13:15,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:13:15,710 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;@4bfa7eb5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:13:15,710 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 15:13:15,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:13:15,714 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:13:15,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:13:15,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:15,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:13:15,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:15,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash -961679146, now seen corresponding path program 1 times [2024-06-04 15:13:15,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:15,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958960473] [2024-06-04 15:13:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:16,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958960473] [2024-06-04 15:13:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958960473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:16,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:16,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:13:16,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102028052] [2024-06-04 15:13:16,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:13:16,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:13:16,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:13:16,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-04 15:13:16,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:16,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:16,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-04 15:13:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:17,943 INFO L124 PetriNetUnfolderBase]: 6197/9042 cut-off events. [2024-06-04 15:13:17,944 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-04 15:13:17,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17790 conditions, 9042 events. 6197/9042 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 52947 event pairs, 4558 based on Foata normal form. 1/8785 useless extension candidates. Maximal degree in co-relation 17774. Up to 8479 conditions per place. [2024-06-04 15:13:17,994 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 15:13:17,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 233 flow [2024-06-04 15:13:17,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:13:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:13:18,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-04 15:13:18,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-04 15:13:18,005 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 103 transitions. [2024-06-04 15:13:18,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 233 flow [2024-06-04 15:13:18,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:18,009 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 15:13:18,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-04 15:13:18,013 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 15:13:18,013 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 15:13:18,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:18,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:18,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:13:18,014 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:18,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash -755668363, now seen corresponding path program 1 times [2024-06-04 15:13:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577301134] [2024-06-04 15:13:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:18,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577301134] [2024-06-04 15:13:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577301134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:18,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:13:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544609760] [2024-06-04 15:13:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:13:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:13:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:13:18,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-04 15:13:18,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:18,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:18,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-04 15:13:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:19,748 INFO L124 PetriNetUnfolderBase]: 7092/10043 cut-off events. [2024-06-04 15:13:19,749 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-04 15:13:19,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 10043 events. 7092/10043 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 57188 event pairs, 4490 based on Foata normal form. 4/9923 useless extension candidates. Maximal degree in co-relation 22757. Up to 9649 conditions per place. [2024-06-04 15:13:19,801 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 15:13:19,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-04 15:13:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:13:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:13:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-04 15:13:19,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-04 15:13:19,803 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-04 15:13:19,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-04 15:13:19,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:13:19,805 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 15:13:19,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-04 15:13:19,806 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 15:13:19,806 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 15:13:19,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:19,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:19,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:19,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:13:19,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:19,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2103117216, now seen corresponding path program 1 times [2024-06-04 15:13:19,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:19,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191418093] [2024-06-04 15:13:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:20,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:20,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191418093] [2024-06-04 15:13:20,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191418093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:20,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:20,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:13:20,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969584743] [2024-06-04 15:13:20,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:20,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:13:20,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:13:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:13:20,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:13:20,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:20,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:20,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:13:20,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:22,248 INFO L124 PetriNetUnfolderBase]: 9006/12670 cut-off events. [2024-06-04 15:13:22,248 INFO L125 PetriNetUnfolderBase]: For 6795/6795 co-relation queries the response was YES. [2024-06-04 15:13:22,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31815 conditions, 12670 events. 9006/12670 cut-off events. For 6795/6795 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70783 event pairs, 4478 based on Foata normal form. 8/12521 useless extension candidates. Maximal degree in co-relation 31798. Up to 12137 conditions per place. [2024-06-04 15:13:22,329 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 72 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-04 15:13:22,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 492 flow [2024-06-04 15:13:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:13:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:13:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-04 15:13:22,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-06-04 15:13:22,331 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 182 transitions. [2024-06-04 15:13:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 492 flow [2024-06-04 15:13:22,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 464 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 15:13:22,350 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-04 15:13:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-04 15:13:22,351 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-04 15:13:22,351 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-04 15:13:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:22,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:22,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:22,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:13:22,352 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:22,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1872865543, now seen corresponding path program 1 times [2024-06-04 15:13:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305039472] [2024-06-04 15:13:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:23,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:23,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305039472] [2024-06-04 15:13:23,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305039472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:23,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:23,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:13:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971079135] [2024-06-04 15:13:23,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:13:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:13:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:13:23,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:13:23,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-04 15:13:23,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:23,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:13:23,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:24,460 INFO L124 PetriNetUnfolderBase]: 7847/11381 cut-off events. [2024-06-04 15:13:24,460 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-04 15:13:24,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31182 conditions, 11381 events. 7847/11381 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 65983 event pairs, 4266 based on Foata normal form. 3/11232 useless extension candidates. Maximal degree in co-relation 31163. Up to 10669 conditions per place. [2024-06-04 15:13:24,529 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 60 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-04 15:13:24,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 451 flow [2024-06-04 15:13:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:13:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:13:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 15:13:24,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-04 15:13:24,531 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 137 transitions. [2024-06-04 15:13:24,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 451 flow [2024-06-04 15:13:24,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 413 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:24,536 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-04 15:13:24,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-04 15:13:24,537 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-04 15:13:24,537 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-04 15:13:24,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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) [2024-06-04 15:13:24,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:24,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:24,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:13:24,538 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:24,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2058196847, now seen corresponding path program 1 times [2024-06-04 15:13:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:24,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374630371] [2024-06-04 15:13:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:24,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374630371] [2024-06-04 15:13:25,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374630371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:25,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:25,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:13:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634492888] [2024-06-04 15:13:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:25,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:13:25,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:25,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:13:25,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:13:25,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:13:25,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:25,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:25,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:13:25,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:26,960 INFO L124 PetriNetUnfolderBase]: 7880/11647 cut-off events. [2024-06-04 15:13:26,961 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-04 15:13:26,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34300 conditions, 11647 events. 7880/11647 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 69481 event pairs, 4072 based on Foata normal form. 7/11625 useless extension candidates. Maximal degree in co-relation 34279. Up to 10583 conditions per place. [2024-06-04 15:13:27,038 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 76 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-04 15:13:27,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 107 transitions, 652 flow [2024-06-04 15:13:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:13:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:13:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-06-04 15:13:27,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 15:13:27,042 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 174 transitions. [2024-06-04 15:13:27,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 107 transitions, 652 flow [2024-06-04 15:13:27,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 623 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:27,050 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 409 flow [2024-06-04 15:13:27,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-04 15:13:27,056 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-04 15:13:27,056 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 409 flow [2024-06-04 15:13:27,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:27,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:27,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:27,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:13:27,057 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:27,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash 226807782, now seen corresponding path program 1 times [2024-06-04 15:13:27,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:27,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139650849] [2024-06-04 15:13:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:27,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:28,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:28,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:28,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139650849] [2024-06-04 15:13:28,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139650849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:28,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:28,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:13:28,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397434563] [2024-06-04 15:13:28,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:28,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:13:28,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:13:28,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:13:28,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:28,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:28,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:28,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:28,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:29,451 INFO L124 PetriNetUnfolderBase]: 9052/12858 cut-off events. [2024-06-04 15:13:29,451 INFO L125 PetriNetUnfolderBase]: For 33981/33991 co-relation queries the response was YES. [2024-06-04 15:13:29,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43820 conditions, 12858 events. 9052/12858 cut-off events. For 33981/33991 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72810 event pairs, 4664 based on Foata normal form. 11/12840 useless extension candidates. Maximal degree in co-relation 43796. Up to 12214 conditions per place. [2024-06-04 15:13:29,541 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 85 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2024-06-04 15:13:29,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 795 flow [2024-06-04 15:13:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:13:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:13:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-04 15:13:29,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-04 15:13:29,543 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 409 flow. Second operand 6 states and 166 transitions. [2024-06-04 15:13:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 795 flow [2024-06-04 15:13:29,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 773 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-04 15:13:29,554 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 516 flow [2024-06-04 15:13:29,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-04 15:13:29,555 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-04 15:13:29,555 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 516 flow [2024-06-04 15:13:29,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:29,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:29,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:29,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:13:29,556 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:29,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 634037112, now seen corresponding path program 2 times [2024-06-04 15:13:29,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:29,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847945237] [2024-06-04 15:13:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:29,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:30,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:30,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847945237] [2024-06-04 15:13:30,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847945237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:30,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:30,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:13:30,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095258681] [2024-06-04 15:13:30,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:30,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:13:30,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:13:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:13:30,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:30,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:30,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:30,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:30,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:31,804 INFO L124 PetriNetUnfolderBase]: 9043/12847 cut-off events. [2024-06-04 15:13:31,805 INFO L125 PetriNetUnfolderBase]: For 45684/45691 co-relation queries the response was YES. [2024-06-04 15:13:31,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46936 conditions, 12847 events. 9043/12847 cut-off events. For 45684/45691 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72699 event pairs, 4667 based on Foata normal form. 9/12827 useless extension candidates. Maximal degree in co-relation 46909. Up to 12205 conditions per place. [2024-06-04 15:13:31,895 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 79 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-04 15:13:31,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 778 flow [2024-06-04 15:13:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:13:31,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:13:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 15:13:31,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-04 15:13:31,897 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 516 flow. Second operand 6 states and 160 transitions. [2024-06-04 15:13:31,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 778 flow [2024-06-04 15:13:31,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 720 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-04 15:13:31,927 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 511 flow [2024-06-04 15:13:31,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=511, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-04 15:13:31,928 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-04 15:13:31,928 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 511 flow [2024-06-04 15:13:31,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:31,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:31,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:31,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:13:31,929 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:31,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash 759818798, now seen corresponding path program 1 times [2024-06-04 15:13:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:31,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34180391] [2024-06-04 15:13:31,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:31,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:32,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34180391] [2024-06-04 15:13:32,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34180391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:32,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:32,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:32,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283372598] [2024-06-04 15:13:32,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:32,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:32,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:32,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:32,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 511 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:32,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:32,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:32,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:34,298 INFO L124 PetriNetUnfolderBase]: 9134/12985 cut-off events. [2024-06-04 15:13:34,298 INFO L125 PetriNetUnfolderBase]: For 51236/51240 co-relation queries the response was YES. [2024-06-04 15:13:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47868 conditions, 12985 events. 9134/12985 cut-off events. For 51236/51240 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73482 event pairs, 4657 based on Foata normal form. 7/12964 useless extension candidates. Maximal degree in co-relation 47839. Up to 12307 conditions per place. [2024-06-04 15:13:34,377 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 103 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-06-04 15:13:34,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1008 flow [2024-06-04 15:13:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 15:13:34,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-04 15:13:34,378 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 511 flow. Second operand 8 states and 215 transitions. [2024-06-04 15:13:34,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1008 flow [2024-06-04 15:13:34,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 143 transitions, 934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:34,409 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 669 flow [2024-06-04 15:13:34,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=669, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-04 15:13:34,410 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-06-04 15:13:34,411 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 669 flow [2024-06-04 15:13:34,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:34,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:34,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:34,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:13:34,411 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:34,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1559012262, now seen corresponding path program 2 times [2024-06-04 15:13:34,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:34,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84703295] [2024-06-04 15:13:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:34,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84703295] [2024-06-04 15:13:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84703295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:35,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:35,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:35,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808046255] [2024-06-04 15:13:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:35,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:35,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:35,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:35,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 669 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:35,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:35,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:35,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:37,080 INFO L124 PetriNetUnfolderBase]: 9156/13025 cut-off events. [2024-06-04 15:13:37,080 INFO L125 PetriNetUnfolderBase]: For 65400/65408 co-relation queries the response was YES. [2024-06-04 15:13:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51437 conditions, 13025 events. 9156/13025 cut-off events. For 65400/65408 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73614 event pairs, 4503 based on Foata normal form. 11/13014 useless extension candidates. Maximal degree in co-relation 51406. Up to 12314 conditions per place. [2024-06-04 15:13:37,151 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 103 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-04 15:13:37,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1119 flow [2024-06-04 15:13:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 15:13:37,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 15:13:37,152 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 669 flow. Second operand 7 states and 189 transitions. [2024-06-04 15:13:37,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1119 flow [2024-06-04 15:13:37,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 1055 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:37,180 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 746 flow [2024-06-04 15:13:37,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-04 15:13:37,181 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-04 15:13:37,181 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 746 flow [2024-06-04 15:13:37,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:37,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:37,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:37,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:13:37,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:37,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:37,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1599423300, now seen corresponding path program 3 times [2024-06-04 15:13:37,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:37,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139960408] [2024-06-04 15:13:37,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:37,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:38,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:38,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139960408] [2024-06-04 15:13:38,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139960408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:38,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:38,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537357095] [2024-06-04 15:13:38,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:38,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:38,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:38,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:38,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 746 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:38,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:38,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:39,723 INFO L124 PetriNetUnfolderBase]: 9178/13066 cut-off events. [2024-06-04 15:13:39,723 INFO L125 PetriNetUnfolderBase]: For 82657/82669 co-relation queries the response was YES. [2024-06-04 15:13:39,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54815 conditions, 13066 events. 9178/13066 cut-off events. For 82657/82669 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73891 event pairs, 4516 based on Foata normal form. 11/13054 useless extension candidates. Maximal degree in co-relation 54783. Up to 12258 conditions per place. [2024-06-04 15:13:39,801 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 93 selfloop transitions, 50 changer transitions 0/151 dead transitions. [2024-06-04 15:13:39,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 151 transitions, 1308 flow [2024-06-04 15:13:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:39,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-04 15:13:39,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-04 15:13:39,802 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 746 flow. Second operand 7 states and 193 transitions. [2024-06-04 15:13:39,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 151 transitions, 1308 flow [2024-06-04 15:13:39,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 151 transitions, 1183 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:39,841 INFO L231 Difference]: Finished difference. Result has 89 places, 115 transitions, 858 flow [2024-06-04 15:13:39,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=858, PETRI_PLACES=89, PETRI_TRANSITIONS=115} [2024-06-04 15:13:39,842 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-04 15:13:39,842 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 115 transitions, 858 flow [2024-06-04 15:13:39,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:39,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:39,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:39,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:13:39,842 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:39,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:39,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1599423114, now seen corresponding path program 1 times [2024-06-04 15:13:39,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:39,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788525709] [2024-06-04 15:13:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:39,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:40,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:40,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788525709] [2024-06-04 15:13:40,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788525709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:40,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884121002] [2024-06-04 15:13:40,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:40,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:40,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:40,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 115 transitions, 858 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:40,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:40,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:40,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:42,755 INFO L124 PetriNetUnfolderBase]: 9334/13286 cut-off events. [2024-06-04 15:13:42,756 INFO L125 PetriNetUnfolderBase]: For 84690/84698 co-relation queries the response was YES. [2024-06-04 15:13:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55721 conditions, 13286 events. 9334/13286 cut-off events. For 84690/84698 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 75025 event pairs, 4186 based on Foata normal form. 15/13264 useless extension candidates. Maximal degree in co-relation 55688. Up to 12170 conditions per place. [2024-06-04 15:13:42,850 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 128 selfloop transitions, 43 changer transitions 0/179 dead transitions. [2024-06-04 15:13:42,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 179 transitions, 1630 flow [2024-06-04 15:13:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-04 15:13:42,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-04 15:13:42,851 INFO L175 Difference]: Start difference. First operand has 89 places, 115 transitions, 858 flow. Second operand 7 states and 206 transitions. [2024-06-04 15:13:42,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 179 transitions, 1630 flow [2024-06-04 15:13:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 179 transitions, 1559 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 15:13:42,911 INFO L231 Difference]: Finished difference. Result has 95 places, 130 transitions, 1060 flow [2024-06-04 15:13:42,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1060, PETRI_PLACES=95, PETRI_TRANSITIONS=130} [2024-06-04 15:13:42,911 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-04 15:13:42,911 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 130 transitions, 1060 flow [2024-06-04 15:13:42,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:42,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:42,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:42,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:13:42,912 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)] === [2024-06-04 15:13:42,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1826597454, now seen corresponding path program 2 times [2024-06-04 15:13:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:42,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114901330] [2024-06-04 15:13:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:43,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:43,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114901330] [2024-06-04 15:13:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114901330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:43,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:43,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:43,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180562826] [2024-06-04 15:13:43,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:43,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:43,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 130 transitions, 1060 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:43,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:43,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:43,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:45,702 INFO L124 PetriNetUnfolderBase]: 9444/13443 cut-off events. [2024-06-04 15:13:45,702 INFO L125 PetriNetUnfolderBase]: For 109680/109697 co-relation queries the response was YES. [2024-06-04 15:13:45,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62039 conditions, 13443 events. 9444/13443 cut-off events. For 109680/109697 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75920 event pairs, 4143 based on Foata normal form. 21/13434 useless extension candidates. Maximal degree in co-relation 62002. Up to 12270 conditions per place. [2024-06-04 15:13:45,794 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 122 selfloop transitions, 59 changer transitions 0/189 dead transitions. [2024-06-04 15:13:45,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 189 transitions, 1873 flow [2024-06-04 15:13:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-04 15:13:45,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 15:13:45,796 INFO L175 Difference]: Start difference. First operand has 95 places, 130 transitions, 1060 flow. Second operand 7 states and 202 transitions. [2024-06-04 15:13:45,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 189 transitions, 1873 flow [2024-06-04 15:13:45,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 189 transitions, 1785 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-04 15:13:45,860 INFO L231 Difference]: Finished difference. Result has 101 places, 144 transitions, 1310 flow [2024-06-04 15:13:45,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1310, PETRI_PLACES=101, PETRI_TRANSITIONS=144} [2024-06-04 15:13:45,861 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-04 15:13:45,861 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 144 transitions, 1310 flow [2024-06-04 15:13:45,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:45,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:45,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:45,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:13:45,862 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)] === [2024-06-04 15:13:45,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:45,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1381760586, now seen corresponding path program 3 times [2024-06-04 15:13:45,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:45,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941988549] [2024-06-04 15:13:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:45,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:46,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:46,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941988549] [2024-06-04 15:13:46,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941988549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:46,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:46,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:46,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128154167] [2024-06-04 15:13:46,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:46,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:46,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:46,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:46,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:46,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:46,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 144 transitions, 1310 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:46,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:46,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:46,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:48,706 INFO L124 PetriNetUnfolderBase]: 9431/13427 cut-off events. [2024-06-04 15:13:48,707 INFO L125 PetriNetUnfolderBase]: For 128420/128437 co-relation queries the response was YES. [2024-06-04 15:13:48,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64655 conditions, 13427 events. 9431/13427 cut-off events. For 128420/128437 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75829 event pairs, 4157 based on Foata normal form. 21/13418 useless extension candidates. Maximal degree in co-relation 64615. Up to 12263 conditions per place. [2024-06-04 15:13:48,785 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 126 selfloop transitions, 54 changer transitions 0/188 dead transitions. [2024-06-04 15:13:48,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 188 transitions, 1938 flow [2024-06-04 15:13:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-04 15:13:48,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 15:13:48,786 INFO L175 Difference]: Start difference. First operand has 101 places, 144 transitions, 1310 flow. Second operand 7 states and 201 transitions. [2024-06-04 15:13:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 188 transitions, 1938 flow [2024-06-04 15:13:48,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 188 transitions, 1868 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-04 15:13:48,881 INFO L231 Difference]: Finished difference. Result has 107 places, 144 transitions, 1361 flow [2024-06-04 15:13:48,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1361, PETRI_PLACES=107, PETRI_TRANSITIONS=144} [2024-06-04 15:13:48,882 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-04 15:13:48,882 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 144 transitions, 1361 flow [2024-06-04 15:13:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:48,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:48,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:48,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:13:48,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:48,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2052548056, now seen corresponding path program 4 times [2024-06-04 15:13:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:48,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306774554] [2024-06-04 15:13:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:49,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306774554] [2024-06-04 15:13:49,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306774554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:49,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:49,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:49,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133360237] [2024-06-04 15:13:49,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:49,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:49,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:49,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 144 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:49,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:49,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:49,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:51,558 INFO L124 PetriNetUnfolderBase]: 9422/13433 cut-off events. [2024-06-04 15:13:51,558 INFO L125 PetriNetUnfolderBase]: For 134330/134334 co-relation queries the response was YES. [2024-06-04 15:13:51,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64853 conditions, 13433 events. 9422/13433 cut-off events. For 134330/134334 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 76122 event pairs, 4352 based on Foata normal form. 3/13404 useless extension candidates. Maximal degree in co-relation 64810. Up to 12585 conditions per place. [2024-06-04 15:13:51,666 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 117 selfloop transitions, 50 changer transitions 0/175 dead transitions. [2024-06-04 15:13:51,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 1793 flow [2024-06-04 15:13:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-04 15:13:51,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-04 15:13:51,668 INFO L175 Difference]: Start difference. First operand has 107 places, 144 transitions, 1361 flow. Second operand 7 states and 187 transitions. [2024-06-04 15:13:51,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 175 transitions, 1793 flow [2024-06-04 15:13:51,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1632 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 15:13:51,792 INFO L231 Difference]: Finished difference. Result has 107 places, 144 transitions, 1311 flow [2024-06-04 15:13:51,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1311, PETRI_PLACES=107, PETRI_TRANSITIONS=144} [2024-06-04 15:13:51,792 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-04 15:13:51,793 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 144 transitions, 1311 flow [2024-06-04 15:13:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:51,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:51,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:51,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:13:51,793 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:51,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2052794320, now seen corresponding path program 1 times [2024-06-04 15:13:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:51,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182168550] [2024-06-04 15:13:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:51,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:52,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:52,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182168550] [2024-06-04 15:13:52,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182168550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:52,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:52,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:13:52,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279134834] [2024-06-04 15:13:52,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:52,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:13:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:13:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:13:52,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:13:52,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 144 transitions, 1311 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:52,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:52,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:13:52,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:54,395 INFO L124 PetriNetUnfolderBase]: 8418/12461 cut-off events. [2024-06-04 15:13:54,395 INFO L125 PetriNetUnfolderBase]: For 128464/128466 co-relation queries the response was YES. [2024-06-04 15:13:54,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59359 conditions, 12461 events. 8418/12461 cut-off events. For 128464/128466 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 74381 event pairs, 3568 based on Foata normal form. 26/12455 useless extension candidates. Maximal degree in co-relation 59317. Up to 11139 conditions per place. [2024-06-04 15:13:54,488 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 156 selfloop transitions, 25 changer transitions 0/190 dead transitions. [2024-06-04 15:13:54,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 190 transitions, 1957 flow [2024-06-04 15:13:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:13:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:13:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-04 15:13:54,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-04 15:13:54,489 INFO L175 Difference]: Start difference. First operand has 107 places, 144 transitions, 1311 flow. Second operand 7 states and 204 transitions. [2024-06-04 15:13:54,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 190 transitions, 1957 flow [2024-06-04 15:13:54,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 190 transitions, 1823 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 15:13:54,598 INFO L231 Difference]: Finished difference. Result has 108 places, 147 transitions, 1294 flow [2024-06-04 15:13:54,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1294, PETRI_PLACES=108, PETRI_TRANSITIONS=147} [2024-06-04 15:13:54,598 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-04 15:13:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 147 transitions, 1294 flow [2024-06-04 15:13:54,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:54,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:54,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:54,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:13:54,599 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)] === [2024-06-04 15:13:54,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:54,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2076803696, now seen corresponding path program 1 times [2024-06-04 15:13:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:54,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267738349] [2024-06-04 15:13:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:54,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:55,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:55,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267738349] [2024-06-04 15:13:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267738349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:55,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:13:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944909126] [2024-06-04 15:13:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:13:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:13:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:13:55,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-04 15:13:55,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 147 transitions, 1294 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:55,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:55,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-04 15:13:55,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:56,669 INFO L124 PetriNetUnfolderBase]: 7960/11991 cut-off events. [2024-06-04 15:13:56,669 INFO L125 PetriNetUnfolderBase]: For 141336/141353 co-relation queries the response was YES. [2024-06-04 15:13:56,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59321 conditions, 11991 events. 7960/11991 cut-off events. For 141336/141353 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 73877 event pairs, 3697 based on Foata normal form. 19/11985 useless extension candidates. Maximal degree in co-relation 59278. Up to 10734 conditions per place. [2024-06-04 15:13:56,762 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 132 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2024-06-04 15:13:56,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1624 flow [2024-06-04 15:13:56,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:13:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:13:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-04 15:13:56,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-04 15:13:56,763 INFO L175 Difference]: Start difference. First operand has 108 places, 147 transitions, 1294 flow. Second operand 5 states and 138 transitions. [2024-06-04 15:13:56,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1624 flow [2024-06-04 15:13:56,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1529 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 15:13:56,874 INFO L231 Difference]: Finished difference. Result has 108 places, 147 transitions, 1228 flow [2024-06-04 15:13:56,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1228, PETRI_PLACES=108, PETRI_TRANSITIONS=147} [2024-06-04 15:13:56,874 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-04 15:13:56,875 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 147 transitions, 1228 flow [2024-06-04 15:13:56,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:56,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:56,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:56,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:13:56,875 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:13:56,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1957342346, now seen corresponding path program 1 times [2024-06-04 15:13:56,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:56,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393785860] [2024-06-04 15:13:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:13:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:13:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:13:57,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393785860] [2024-06-04 15:13:57,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393785860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:13:57,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:13:57,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:13:57,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986779475] [2024-06-04 15:13:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:13:57,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:13:57,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:13:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:13:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:13:57,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:13:57,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 147 transitions, 1228 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:57,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:13:57,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:13:57,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:13:59,766 INFO L124 PetriNetUnfolderBase]: 9710/13854 cut-off events. [2024-06-04 15:13:59,767 INFO L125 PetriNetUnfolderBase]: For 179773/179781 co-relation queries the response was YES. [2024-06-04 15:13:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69848 conditions, 13854 events. 9710/13854 cut-off events. For 179773/179781 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78893 event pairs, 4156 based on Foata normal form. 15/13825 useless extension candidates. Maximal degree in co-relation 69804. Up to 12842 conditions per place. [2024-06-04 15:13:59,866 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 161 selfloop transitions, 48 changer transitions 0/217 dead transitions. [2024-06-04 15:13:59,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 217 transitions, 2166 flow [2024-06-04 15:13:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:13:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:13:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-04 15:13:59,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-06-04 15:13:59,877 INFO L175 Difference]: Start difference. First operand has 108 places, 147 transitions, 1228 flow. Second operand 8 states and 231 transitions. [2024-06-04 15:13:59,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 217 transitions, 2166 flow [2024-06-04 15:13:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 217 transitions, 2137 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 15:13:59,978 INFO L231 Difference]: Finished difference. Result has 114 places, 161 transitions, 1523 flow [2024-06-04 15:13:59,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1523, PETRI_PLACES=114, PETRI_TRANSITIONS=161} [2024-06-04 15:13:59,979 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-04 15:13:59,979 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 161 transitions, 1523 flow [2024-06-04 15:13:59,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:13:59,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:13:59,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:13:59,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:13:59,979 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)] === [2024-06-04 15:13:59,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:13:59,980 INFO L85 PathProgramCache]: Analyzing trace with hash -994814670, now seen corresponding path program 2 times [2024-06-04 15:13:59,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:13:59,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738284330] [2024-06-04 15:13:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:13:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:13:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:00,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:00,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738284330] [2024-06-04 15:14:00,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738284330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:00,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:00,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898458272] [2024-06-04 15:14:00,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:01,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:01,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 161 transitions, 1523 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:01,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:01,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:01,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:03,190 INFO L124 PetriNetUnfolderBase]: 9943/14225 cut-off events. [2024-06-04 15:14:03,190 INFO L125 PetriNetUnfolderBase]: For 220110/220112 co-relation queries the response was YES. [2024-06-04 15:14:03,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77318 conditions, 14225 events. 9943/14225 cut-off events. For 220110/220112 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 81553 event pairs, 3981 based on Foata normal form. 7/14188 useless extension candidates. Maximal degree in co-relation 77272. Up to 12358 conditions per place. [2024-06-04 15:14:03,289 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 98 changer transitions 0/237 dead transitions. [2024-06-04 15:14:03,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 237 transitions, 2759 flow [2024-06-04 15:14:03,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-06-04 15:14:03,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2024-06-04 15:14:03,291 INFO L175 Difference]: Start difference. First operand has 114 places, 161 transitions, 1523 flow. Second operand 8 states and 239 transitions. [2024-06-04 15:14:03,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 237 transitions, 2759 flow [2024-06-04 15:14:03,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 237 transitions, 2616 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-04 15:14:03,432 INFO L231 Difference]: Finished difference. Result has 120 places, 180 transitions, 1926 flow [2024-06-04 15:14:03,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1926, PETRI_PLACES=120, PETRI_TRANSITIONS=180} [2024-06-04 15:14:03,432 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-04 15:14:03,432 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 180 transitions, 1926 flow [2024-06-04 15:14:03,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:03,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:03,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:03,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:14:03,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:03,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1957486496, now seen corresponding path program 3 times [2024-06-04 15:14:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997159187] [2024-06-04 15:14:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:03,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:04,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:04,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997159187] [2024-06-04 15:14:04,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997159187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:04,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:04,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:04,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346289910] [2024-06-04 15:14:04,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:04,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:04,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:04,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:04,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:04,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 180 transitions, 1926 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:04,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:04,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:04,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:06,656 INFO L124 PetriNetUnfolderBase]: 9930/14209 cut-off events. [2024-06-04 15:14:06,656 INFO L125 PetriNetUnfolderBase]: For 261143/261165 co-relation queries the response was YES. [2024-06-04 15:14:06,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82902 conditions, 14209 events. 9930/14209 cut-off events. For 261143/261165 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 81552 event pairs, 3995 based on Foata normal form. 27/14192 useless extension candidates. Maximal degree in co-relation 82853. Up to 12351 conditions per place. [2024-06-04 15:14:06,754 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 136 selfloop transitions, 92 changer transitions 0/236 dead transitions. [2024-06-04 15:14:06,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 236 transitions, 2886 flow [2024-06-04 15:14:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-04 15:14:06,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2024-06-04 15:14:06,755 INFO L175 Difference]: Start difference. First operand has 120 places, 180 transitions, 1926 flow. Second operand 8 states and 238 transitions. [2024-06-04 15:14:06,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 236 transitions, 2886 flow [2024-06-04 15:14:06,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 236 transitions, 2732 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-04 15:14:06,963 INFO L231 Difference]: Finished difference. Result has 126 places, 180 transitions, 1971 flow [2024-06-04 15:14:06,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1971, PETRI_PLACES=126, PETRI_TRANSITIONS=180} [2024-06-04 15:14:06,963 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-04 15:14:06,964 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 180 transitions, 1971 flow [2024-06-04 15:14:06,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:06,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:06,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:06,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:14:06,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:06,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -789945168, now seen corresponding path program 4 times [2024-06-04 15:14:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:06,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653601521] [2024-06-04 15:14:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:06,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:07,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:07,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653601521] [2024-06-04 15:14:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653601521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:07,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054871124] [2024-06-04 15:14:07,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:07,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:07,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:07,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:08,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:08,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 180 transitions, 1971 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:08,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:08,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:08,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:10,198 INFO L124 PetriNetUnfolderBase]: 10040/14385 cut-off events. [2024-06-04 15:14:10,198 INFO L125 PetriNetUnfolderBase]: For 270558/270562 co-relation queries the response was YES. [2024-06-04 15:14:10,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82860 conditions, 14385 events. 10040/14385 cut-off events. For 270558/270562 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 82573 event pairs, 3937 based on Foata normal form. 7/14344 useless extension candidates. Maximal degree in co-relation 82809. Up to 12451 conditions per place. [2024-06-04 15:14:10,318 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 118 selfloop transitions, 115 changer transitions 0/241 dead transitions. [2024-06-04 15:14:10,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 241 transitions, 3025 flow [2024-06-04 15:14:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-04 15:14:10,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 15:14:10,319 INFO L175 Difference]: Start difference. First operand has 126 places, 180 transitions, 1971 flow. Second operand 8 states and 232 transitions. [2024-06-04 15:14:10,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 241 transitions, 3025 flow [2024-06-04 15:14:10,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 241 transitions, 2768 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:10,519 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2217 flow [2024-06-04 15:14:10,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2217, PETRI_PLACES=128, PETRI_TRANSITIONS=191} [2024-06-04 15:14:10,520 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-04 15:14:10,520 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2217 flow [2024-06-04 15:14:10,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:10,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:10,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:10,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:14:10,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:10,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -795518460, now seen corresponding path program 5 times [2024-06-04 15:14:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751442120] [2024-06-04 15:14:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:11,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:11,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751442120] [2024-06-04 15:14:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751442120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:11,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:11,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896528630] [2024-06-04 15:14:11,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:11,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:11,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:11,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:11,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 191 transitions, 2217 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:11,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:11,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:11,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:13,616 INFO L124 PetriNetUnfolderBase]: 10104/14491 cut-off events. [2024-06-04 15:14:13,616 INFO L125 PetriNetUnfolderBase]: For 299607/299621 co-relation queries the response was YES. [2024-06-04 15:14:13,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85880 conditions, 14491 events. 10104/14491 cut-off events. For 299607/299621 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83463 event pairs, 3981 based on Foata normal form. 17/14461 useless extension candidates. Maximal degree in co-relation 85828. Up to 12510 conditions per place. [2024-06-04 15:14:13,742 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 135 selfloop transitions, 105 changer transitions 0/248 dead transitions. [2024-06-04 15:14:13,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 248 transitions, 3278 flow [2024-06-04 15:14:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:13,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:13,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-04 15:14:13,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 15:14:13,743 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2217 flow. Second operand 8 states and 234 transitions. [2024-06-04 15:14:13,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 248 transitions, 3278 flow [2024-06-04 15:14:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 248 transitions, 3152 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-04 15:14:14,016 INFO L231 Difference]: Finished difference. Result has 133 places, 196 transitions, 2409 flow [2024-06-04 15:14:14,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2409, PETRI_PLACES=133, PETRI_TRANSITIONS=196} [2024-06-04 15:14:14,016 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-04 15:14:14,016 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 196 transitions, 2409 flow [2024-06-04 15:14:14,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:14,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:14,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:14,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:14:14,017 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:14,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -795512880, now seen corresponding path program 6 times [2024-06-04 15:14:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:14,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275224189] [2024-06-04 15:14:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:14,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:14,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275224189] [2024-06-04 15:14:14,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275224189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:14,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:14,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:14,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125025512] [2024-06-04 15:14:14,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:14,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:14,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:15,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:15,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 196 transitions, 2409 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:15,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:15,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:15,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:17,120 INFO L124 PetriNetUnfolderBase]: 10091/14477 cut-off events. [2024-06-04 15:14:17,120 INFO L125 PetriNetUnfolderBase]: For 299944/299948 co-relation queries the response was YES. [2024-06-04 15:14:17,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85314 conditions, 14477 events. 10091/14477 cut-off events. For 299944/299948 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83309 event pairs, 3972 based on Foata normal form. 7/14436 useless extension candidates. Maximal degree in co-relation 85260. Up to 12503 conditions per place. [2024-06-04 15:14:17,255 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 106 changer transitions 0/245 dead transitions. [2024-06-04 15:14:17,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 3265 flow [2024-06-04 15:14:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-04 15:14:17,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 15:14:17,256 INFO L175 Difference]: Start difference. First operand has 133 places, 196 transitions, 2409 flow. Second operand 8 states and 232 transitions. [2024-06-04 15:14:17,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 3265 flow [2024-06-04 15:14:17,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 245 transitions, 2811 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-04 15:14:17,585 INFO L231 Difference]: Finished difference. Result has 132 places, 196 transitions, 2179 flow [2024-06-04 15:14:17,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2179, PETRI_PLACES=132, PETRI_TRANSITIONS=196} [2024-06-04 15:14:17,585 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-04 15:14:17,585 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 196 transitions, 2179 flow [2024-06-04 15:14:17,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:17,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:17,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:17,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:14:17,586 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:17,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1794066547, now seen corresponding path program 1 times [2024-06-04 15:14:17,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:17,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519626333] [2024-06-04 15:14:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:18,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:18,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519626333] [2024-06-04 15:14:18,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519626333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:18,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:18,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:18,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502501905] [2024-06-04 15:14:18,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:18,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:18,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:18,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 196 transitions, 2179 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:18,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:18,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:18,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:20,680 INFO L124 PetriNetUnfolderBase]: 10178/14596 cut-off events. [2024-06-04 15:14:20,680 INFO L125 PetriNetUnfolderBase]: For 316799/316807 co-relation queries the response was YES. [2024-06-04 15:14:20,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85929 conditions, 14596 events. 10178/14596 cut-off events. For 316799/316807 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 84142 event pairs, 3275 based on Foata normal form. 14/14579 useless extension candidates. Maximal degree in co-relation 85877. Up to 13554 conditions per place. [2024-06-04 15:14:20,812 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 208 selfloop transitions, 43 changer transitions 0/259 dead transitions. [2024-06-04 15:14:20,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 259 transitions, 3115 flow [2024-06-04 15:14:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:14:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:14:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-04 15:14:20,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 15:14:20,813 INFO L175 Difference]: Start difference. First operand has 132 places, 196 transitions, 2179 flow. Second operand 9 states and 243 transitions. [2024-06-04 15:14:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 259 transitions, 3115 flow [2024-06-04 15:14:21,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 259 transitions, 2807 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 15:14:21,050 INFO L231 Difference]: Finished difference. Result has 133 places, 202 transitions, 2101 flow [2024-06-04 15:14:21,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2101, PETRI_PLACES=133, PETRI_TRANSITIONS=202} [2024-06-04 15:14:21,051 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-04 15:14:21,051 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 202 transitions, 2101 flow [2024-06-04 15:14:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:21,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:21,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:21,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:14:21,051 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)] === [2024-06-04 15:14:21,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 437244377, now seen corresponding path program 2 times [2024-06-04 15:14:21,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:21,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183885741] [2024-06-04 15:14:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:21,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:22,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183885741] [2024-06-04 15:14:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183885741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:22,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336418638] [2024-06-04 15:14:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:22,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:22,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 202 transitions, 2101 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:22,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:22,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:22,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:24,171 INFO L124 PetriNetUnfolderBase]: 10163/14575 cut-off events. [2024-06-04 15:14:24,171 INFO L125 PetriNetUnfolderBase]: For 344517/344525 co-relation queries the response was YES. [2024-06-04 15:14:24,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86433 conditions, 14575 events. 10163/14575 cut-off events. For 344517/344525 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 83934 event pairs, 3903 based on Foata normal form. 14/14558 useless extension candidates. Maximal degree in co-relation 86382. Up to 13640 conditions per place. [2024-06-04 15:14:24,302 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 203 selfloop transitions, 37 changer transitions 0/248 dead transitions. [2024-06-04 15:14:24,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 2733 flow [2024-06-04 15:14:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-04 15:14:24,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2024-06-04 15:14:24,303 INFO L175 Difference]: Start difference. First operand has 133 places, 202 transitions, 2101 flow. Second operand 8 states and 214 transitions. [2024-06-04 15:14:24,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 2733 flow [2024-06-04 15:14:24,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 248 transitions, 2580 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:24,617 INFO L231 Difference]: Finished difference. Result has 136 places, 202 transitions, 2033 flow [2024-06-04 15:14:24,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2033, PETRI_PLACES=136, PETRI_TRANSITIONS=202} [2024-06-04 15:14:24,617 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 79 predicate places. [2024-06-04 15:14:24,617 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 202 transitions, 2033 flow [2024-06-04 15:14:24,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:24,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:24,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:14:24,618 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)] === [2024-06-04 15:14:24,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash -774660363, now seen corresponding path program 3 times [2024-06-04 15:14:24,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:24,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755066175] [2024-06-04 15:14:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:24,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:25,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755066175] [2024-06-04 15:14:25,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755066175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:25,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:25,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:25,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392044857] [2024-06-04 15:14:25,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:25,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:25,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 202 transitions, 2033 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:25,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:25,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:25,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:27,735 INFO L124 PetriNetUnfolderBase]: 10199/14626 cut-off events. [2024-06-04 15:14:27,736 INFO L125 PetriNetUnfolderBase]: For 368916/368926 co-relation queries the response was YES. [2024-06-04 15:14:27,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87547 conditions, 14626 events. 10199/14626 cut-off events. For 368916/368926 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 84368 event pairs, 3916 based on Foata normal form. 12/14606 useless extension candidates. Maximal degree in co-relation 87494. Up to 13617 conditions per place. [2024-06-04 15:14:27,856 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 185 selfloop transitions, 53 changer transitions 0/246 dead transitions. [2024-06-04 15:14:27,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 246 transitions, 2707 flow [2024-06-04 15:14:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 15:14:27,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-04 15:14:27,857 INFO L175 Difference]: Start difference. First operand has 136 places, 202 transitions, 2033 flow. Second operand 8 states and 215 transitions. [2024-06-04 15:14:27,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 246 transitions, 2707 flow [2024-06-04 15:14:28,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 246 transitions, 2623 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 15:14:28,099 INFO L231 Difference]: Finished difference. Result has 137 places, 205 transitions, 2141 flow [2024-06-04 15:14:28,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2141, PETRI_PLACES=137, PETRI_TRANSITIONS=205} [2024-06-04 15:14:28,100 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-06-04 15:14:28,100 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 205 transitions, 2141 flow [2024-06-04 15:14:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:28,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:28,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:28,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:14:28,101 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)] === [2024-06-04 15:14:28,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:28,101 INFO L85 PathProgramCache]: Analyzing trace with hash 552720245, now seen corresponding path program 1 times [2024-06-04 15:14:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:28,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200190808] [2024-06-04 15:14:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:29,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200190808] [2024-06-04 15:14:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200190808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:29,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:29,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103393497] [2024-06-04 15:14:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:29,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:29,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:29,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:29,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:29,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 205 transitions, 2141 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:29,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:29,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:29,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:31,414 INFO L124 PetriNetUnfolderBase]: 10396/14863 cut-off events. [2024-06-04 15:14:31,414 INFO L125 PetriNetUnfolderBase]: For 412196/412204 co-relation queries the response was YES. [2024-06-04 15:14:31,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91416 conditions, 14863 events. 10396/14863 cut-off events. For 412196/412204 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85396 event pairs, 3802 based on Foata normal form. 34/14850 useless extension candidates. Maximal degree in co-relation 91362. Up to 13428 conditions per place. [2024-06-04 15:14:31,535 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 201 selfloop transitions, 57 changer transitions 0/266 dead transitions. [2024-06-04 15:14:31,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 266 transitions, 3197 flow [2024-06-04 15:14:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-04 15:14:31,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 15:14:31,536 INFO L175 Difference]: Start difference. First operand has 137 places, 205 transitions, 2141 flow. Second operand 8 states and 234 transitions. [2024-06-04 15:14:31,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 266 transitions, 3197 flow [2024-06-04 15:14:31,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 266 transitions, 3031 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:31,801 INFO L231 Difference]: Finished difference. Result has 139 places, 208 transitions, 2172 flow [2024-06-04 15:14:31,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2172, PETRI_PLACES=139, PETRI_TRANSITIONS=208} [2024-06-04 15:14:31,801 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-04 15:14:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 208 transitions, 2172 flow [2024-06-04 15:14:31,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:31,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:31,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:31,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 15:14:31,802 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 481184717, now seen corresponding path program 1 times [2024-06-04 15:14:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659676249] [2024-06-04 15:14:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:32,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659676249] [2024-06-04 15:14:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659676249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:32,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:32,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:14:32,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263745731] [2024-06-04 15:14:32,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:32,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:14:32,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:14:32,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:14:32,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:14:32,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 208 transitions, 2172 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:32,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:32,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:14:32,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:34,491 INFO L124 PetriNetUnfolderBase]: 9861/14377 cut-off events. [2024-06-04 15:14:34,491 INFO L125 PetriNetUnfolderBase]: For 436921/436968 co-relation queries the response was YES. [2024-06-04 15:14:34,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91356 conditions, 14377 events. 9861/14377 cut-off events. For 436921/436968 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 85463 event pairs, 3822 based on Foata normal form. 31/14353 useless extension candidates. Maximal degree in co-relation 91301. Up to 13120 conditions per place. [2024-06-04 15:14:34,808 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 182 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-06-04 15:14:34,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 243 transitions, 2901 flow [2024-06-04 15:14:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:14:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:14:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-04 15:14:34,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-04 15:14:34,809 INFO L175 Difference]: Start difference. First operand has 139 places, 208 transitions, 2172 flow. Second operand 6 states and 169 transitions. [2024-06-04 15:14:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 243 transitions, 2901 flow [2024-06-04 15:14:35,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 243 transitions, 2734 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:35,052 INFO L231 Difference]: Finished difference. Result has 139 places, 215 transitions, 2204 flow [2024-06-04 15:14:35,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2011, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2204, PETRI_PLACES=139, PETRI_TRANSITIONS=215} [2024-06-04 15:14:35,052 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-04 15:14:35,052 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 215 transitions, 2204 flow [2024-06-04 15:14:35,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:35,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:35,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:35,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 15:14:35,053 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:35,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1108727831, now seen corresponding path program 4 times [2024-06-04 15:14:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998724659] [2024-06-04 15:14:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:36,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:36,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998724659] [2024-06-04 15:14:36,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998724659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:36,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:36,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531507500] [2024-06-04 15:14:36,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:36,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:36,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:36,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:36,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:36,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 215 transitions, 2204 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:36,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:36,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:36,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:38,239 INFO L124 PetriNetUnfolderBase]: 10445/14969 cut-off events. [2024-06-04 15:14:38,239 INFO L125 PetriNetUnfolderBase]: For 460387/460391 co-relation queries the response was YES. [2024-06-04 15:14:38,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94388 conditions, 14969 events. 10445/14969 cut-off events. For 460387/460391 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 86271 event pairs, 3924 based on Foata normal form. 6/14924 useless extension candidates. Maximal degree in co-relation 94332. Up to 13963 conditions per place. [2024-06-04 15:14:38,372 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 196 selfloop transitions, 53 changer transitions 0/257 dead transitions. [2024-06-04 15:14:38,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 257 transitions, 2904 flow [2024-06-04 15:14:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 15:14:38,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-04 15:14:38,374 INFO L175 Difference]: Start difference. First operand has 139 places, 215 transitions, 2204 flow. Second operand 8 states and 212 transitions. [2024-06-04 15:14:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 257 transitions, 2904 flow [2024-06-04 15:14:38,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 257 transitions, 2817 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-04 15:14:38,692 INFO L231 Difference]: Finished difference. Result has 144 places, 218 transitions, 2319 flow [2024-06-04 15:14:38,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2319, PETRI_PLACES=144, PETRI_TRANSITIONS=218} [2024-06-04 15:14:38,692 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2024-06-04 15:14:38,692 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 218 transitions, 2319 flow [2024-06-04 15:14:38,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:38,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:38,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 15:14:38,693 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1108912529, now seen corresponding path program 2 times [2024-06-04 15:14:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594851967] [2024-06-04 15:14:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:39,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594851967] [2024-06-04 15:14:39,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594851967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:39,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:39,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:39,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771553463] [2024-06-04 15:14:39,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:39,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 218 transitions, 2319 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:39,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:41,947 INFO L124 PetriNetUnfolderBase]: 10642/15225 cut-off events. [2024-06-04 15:14:41,947 INFO L125 PetriNetUnfolderBase]: For 508421/508438 co-relation queries the response was YES. [2024-06-04 15:14:42,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98302 conditions, 15225 events. 10642/15225 cut-off events. For 508421/508438 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 87659 event pairs, 3747 based on Foata normal form. 40/15222 useless extension candidates. Maximal degree in co-relation 98245. Up to 13751 conditions per place. [2024-06-04 15:14:42,101 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 209 selfloop transitions, 60 changer transitions 0/277 dead transitions. [2024-06-04 15:14:42,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 277 transitions, 3437 flow [2024-06-04 15:14:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-04 15:14:42,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-06-04 15:14:42,102 INFO L175 Difference]: Start difference. First operand has 144 places, 218 transitions, 2319 flow. Second operand 8 states and 230 transitions. [2024-06-04 15:14:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 277 transitions, 3437 flow [2024-06-04 15:14:42,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 277 transitions, 3261 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:42,566 INFO L231 Difference]: Finished difference. Result has 146 places, 221 transitions, 2356 flow [2024-06-04 15:14:42,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2356, PETRI_PLACES=146, PETRI_TRANSITIONS=221} [2024-06-04 15:14:42,568 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-04 15:14:42,568 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 221 transitions, 2356 flow [2024-06-04 15:14:42,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:42,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:42,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:42,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 15:14:42,569 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1345087889, now seen corresponding path program 3 times [2024-06-04 15:14:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867631665] [2024-06-04 15:14:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:42,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:43,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867631665] [2024-06-04 15:14:43,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867631665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:43,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:43,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205389637] [2024-06-04 15:14:43,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:43,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:43,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:43,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 221 transitions, 2356 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:43,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:43,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:43,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:45,922 INFO L124 PetriNetUnfolderBase]: 10839/15508 cut-off events. [2024-06-04 15:14:45,922 INFO L125 PetriNetUnfolderBase]: For 552167/552184 co-relation queries the response was YES. [2024-06-04 15:14:46,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102703 conditions, 15508 events. 10839/15508 cut-off events. For 552167/552184 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89447 event pairs, 3755 based on Foata normal form. 40/15505 useless extension candidates. Maximal degree in co-relation 102645. Up to 14034 conditions per place. [2024-06-04 15:14:46,079 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 205 selfloop transitions, 65 changer transitions 0/278 dead transitions. [2024-06-04 15:14:46,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 278 transitions, 3378 flow [2024-06-04 15:14:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:46,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-04 15:14:46,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 15:14:46,080 INFO L175 Difference]: Start difference. First operand has 146 places, 221 transitions, 2356 flow. Second operand 8 states and 228 transitions. [2024-06-04 15:14:46,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 278 transitions, 3378 flow [2024-06-04 15:14:46,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 278 transitions, 3217 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:46,542 INFO L231 Difference]: Finished difference. Result has 149 places, 224 transitions, 2424 flow [2024-06-04 15:14:46,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=149, PETRI_TRANSITIONS=224} [2024-06-04 15:14:46,543 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 92 predicate places. [2024-06-04 15:14:46,543 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 224 transitions, 2424 flow [2024-06-04 15:14:46,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:46,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:46,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:46,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 15:14:46,543 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:46,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:46,544 INFO L85 PathProgramCache]: Analyzing trace with hash -490515821, now seen corresponding path program 4 times [2024-06-04 15:14:46,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:46,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814898105] [2024-06-04 15:14:46,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:46,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:47,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:47,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814898105] [2024-06-04 15:14:47,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814898105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:47,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:47,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:14:47,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431460256] [2024-06-04 15:14:47,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:14:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:14:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:14:47,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:14:47,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 224 transitions, 2424 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:47,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:47,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:14:47,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:49,896 INFO L124 PetriNetUnfolderBase]: 10985/15724 cut-off events. [2024-06-04 15:14:49,896 INFO L125 PetriNetUnfolderBase]: For 587434/587451 co-relation queries the response was YES. [2024-06-04 15:14:49,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105655 conditions, 15724 events. 10985/15724 cut-off events. For 587434/587451 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 90994 event pairs, 3496 based on Foata normal form. 40/15721 useless extension candidates. Maximal degree in co-relation 105596. Up to 13459 conditions per place. [2024-06-04 15:14:50,052 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 201 selfloop transitions, 76 changer transitions 0/285 dead transitions. [2024-06-04 15:14:50,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 285 transitions, 3494 flow [2024-06-04 15:14:50,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:14:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:14:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-04 15:14:50,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2024-06-04 15:14:50,053 INFO L175 Difference]: Start difference. First operand has 149 places, 224 transitions, 2424 flow. Second operand 8 states and 231 transitions. [2024-06-04 15:14:50,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 285 transitions, 3494 flow [2024-06-04 15:14:50,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 285 transitions, 3333 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:50,536 INFO L231 Difference]: Finished difference. Result has 152 places, 227 transitions, 2519 flow [2024-06-04 15:14:50,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2519, PETRI_PLACES=152, PETRI_TRANSITIONS=227} [2024-06-04 15:14:50,536 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-04 15:14:50,536 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 227 transitions, 2519 flow [2024-06-04 15:14:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:50,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:50,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:50,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 15:14:50,537 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:50,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1351487087, now seen corresponding path program 2 times [2024-06-04 15:14:50,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919347161] [2024-06-04 15:14:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:51,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:51,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919347161] [2024-06-04 15:14:51,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919347161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:51,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:51,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:14:51,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886111773] [2024-06-04 15:14:51,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:51,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:14:51,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:51,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:14:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:14:51,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:14:51,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 227 transitions, 2519 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:51,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:51,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:14:51,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:53,576 INFO L124 PetriNetUnfolderBase]: 10265/14996 cut-off events. [2024-06-04 15:14:53,576 INFO L125 PetriNetUnfolderBase]: For 607471/607486 co-relation queries the response was YES. [2024-06-04 15:14:53,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102231 conditions, 14996 events. 10265/14996 cut-off events. For 607471/607486 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 90119 event pairs, 3956 based on Foata normal form. 17/14952 useless extension candidates. Maximal degree in co-relation 102171. Up to 13619 conditions per place. [2024-06-04 15:14:53,732 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 183 selfloop transitions, 41 changer transitions 0/247 dead transitions. [2024-06-04 15:14:53,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 247 transitions, 3027 flow [2024-06-04 15:14:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:14:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:14:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 15:14:53,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-04 15:14:53,733 INFO L175 Difference]: Start difference. First operand has 152 places, 227 transitions, 2519 flow. Second operand 6 states and 160 transitions. [2024-06-04 15:14:53,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 247 transitions, 3027 flow [2024-06-04 15:14:54,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 247 transitions, 2777 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-04 15:14:54,288 INFO L231 Difference]: Finished difference. Result has 152 places, 227 transitions, 2363 flow [2024-06-04 15:14:54,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2363, PETRI_PLACES=152, PETRI_TRANSITIONS=227} [2024-06-04 15:14:54,288 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-04 15:14:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 227 transitions, 2363 flow [2024-06-04 15:14:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:54,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:54,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 15:14:54,289 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:54,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1345029539, now seen corresponding path program 1 times [2024-06-04 15:14:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:54,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783167548] [2024-06-04 15:14:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:55,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:55,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783167548] [2024-06-04 15:14:55,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783167548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:55,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:55,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:14:55,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210041262] [2024-06-04 15:14:55,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:14:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:55,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:14:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:14:55,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:14:55,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 227 transitions, 2363 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:14:55,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:14:57,376 INFO L124 PetriNetUnfolderBase]: 9825/14562 cut-off events. [2024-06-04 15:14:57,376 INFO L125 PetriNetUnfolderBase]: For 551345/551347 co-relation queries the response was YES. [2024-06-04 15:14:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95740 conditions, 14562 events. 9825/14562 cut-off events. For 551345/551347 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 88436 event pairs, 3440 based on Foata normal form. 8/14514 useless extension candidates. Maximal degree in co-relation 95679. Up to 13276 conditions per place. [2024-06-04 15:14:57,534 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 223 selfloop transitions, 25 changer transitions 0/257 dead transitions. [2024-06-04 15:14:57,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 257 transitions, 3112 flow [2024-06-04 15:14:57,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:14:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:14:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-04 15:14:57,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-04 15:14:57,535 INFO L175 Difference]: Start difference. First operand has 152 places, 227 transitions, 2363 flow. Second operand 6 states and 168 transitions. [2024-06-04 15:14:57,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 257 transitions, 3112 flow [2024-06-04 15:14:57,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 257 transitions, 2995 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 15:14:57,930 INFO L231 Difference]: Finished difference. Result has 153 places, 231 transitions, 2362 flow [2024-06-04 15:14:57,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2362, PETRI_PLACES=153, PETRI_TRANSITIONS=231} [2024-06-04 15:14:57,931 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-04 15:14:57,931 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 231 transitions, 2362 flow [2024-06-04 15:14:57,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:57,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:14:57,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:14:57,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 15:14:57,931 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:14:57,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:14:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash 349180313, now seen corresponding path program 2 times [2024-06-04 15:14:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:14:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752151680] [2024-06-04 15:14:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:14:57,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:14:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:14:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:14:58,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:14:58,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752151680] [2024-06-04 15:14:58,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752151680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:14:58,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:14:58,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:14:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532137602] [2024-06-04 15:14:58,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:14:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:14:58,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:14:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:14:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:14:58,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-04 15:14:58,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 231 transitions, 2362 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:14:58,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:14:58,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-04 15:14:58,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:00,741 INFO L124 PetriNetUnfolderBase]: 9673/14276 cut-off events. [2024-06-04 15:15:00,741 INFO L125 PetriNetUnfolderBase]: For 570957/570959 co-relation queries the response was YES. [2024-06-04 15:15:00,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95341 conditions, 14276 events. 9673/14276 cut-off events. For 570957/570959 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 85894 event pairs, 3363 based on Foata normal form. 4/14223 useless extension candidates. Maximal degree in co-relation 95279. Up to 13060 conditions per place. [2024-06-04 15:15:00,894 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 217 selfloop transitions, 26 changer transitions 0/252 dead transitions. [2024-06-04 15:15:00,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 2910 flow [2024-06-04 15:15:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:15:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:15:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-04 15:15:00,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-04 15:15:00,895 INFO L175 Difference]: Start difference. First operand has 153 places, 231 transitions, 2362 flow. Second operand 6 states and 164 transitions. [2024-06-04 15:15:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 2910 flow [2024-06-04 15:15:01,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 252 transitions, 2859 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 15:15:01,427 INFO L231 Difference]: Finished difference. Result has 156 places, 231 transitions, 2372 flow [2024-06-04 15:15:01,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2372, PETRI_PLACES=156, PETRI_TRANSITIONS=231} [2024-06-04 15:15:01,428 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 99 predicate places. [2024-06-04 15:15:01,428 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 231 transitions, 2372 flow [2024-06-04 15:15:01,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:01,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:01,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:01,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 15:15:01,428 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:15:01,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1154558435, now seen corresponding path program 1 times [2024-06-04 15:15:01,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:01,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209122142] [2024-06-04 15:15:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:01,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:02,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:02,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209122142] [2024-06-04 15:15:02,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209122142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:02,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:02,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447682235] [2024-06-04 15:15:02,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:02,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:02,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:02,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:15:02,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 231 transitions, 2372 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:02,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:02,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:15:02,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:05,468 INFO L124 PetriNetUnfolderBase]: 12896/18695 cut-off events. [2024-06-04 15:15:05,469 INFO L125 PetriNetUnfolderBase]: For 896445/896453 co-relation queries the response was YES. [2024-06-04 15:15:05,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131811 conditions, 18695 events. 12896/18695 cut-off events. For 896445/896453 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 115247 event pairs, 3803 based on Foata normal form. 86/18675 useless extension candidates. Maximal degree in co-relation 131748. Up to 14311 conditions per place. [2024-06-04 15:15:05,667 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 260 selfloop transitions, 62 changer transitions 0/330 dead transitions. [2024-06-04 15:15:05,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 330 transitions, 4034 flow [2024-06-04 15:15:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:15:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:15:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 298 transitions. [2024-06-04 15:15:05,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518518518518518 [2024-06-04 15:15:05,669 INFO L175 Difference]: Start difference. First operand has 156 places, 231 transitions, 2372 flow. Second operand 10 states and 298 transitions. [2024-06-04 15:15:05,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 330 transitions, 4034 flow [2024-06-04 15:15:06,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 330 transitions, 3950 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 15:15:06,741 INFO L231 Difference]: Finished difference. Result has 162 places, 237 transitions, 2645 flow [2024-06-04 15:15:06,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2645, PETRI_PLACES=162, PETRI_TRANSITIONS=237} [2024-06-04 15:15:06,741 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 105 predicate places. [2024-06-04 15:15:06,741 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 237 transitions, 2645 flow [2024-06-04 15:15:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:06,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:06,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:06,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 15:15:06,742 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:15:06,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:06,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1243124195, now seen corresponding path program 2 times [2024-06-04 15:15:06,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:06,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448813249] [2024-06-04 15:15:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:07,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:07,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448813249] [2024-06-04 15:15:07,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448813249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:07,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:07,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:07,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565602596] [2024-06-04 15:15:07,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:07,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:08,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:15:08,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 237 transitions, 2645 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:08,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:08,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:15:08,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:11,492 INFO L124 PetriNetUnfolderBase]: 13401/19532 cut-off events. [2024-06-04 15:15:11,492 INFO L125 PetriNetUnfolderBase]: For 982065/982073 co-relation queries the response was YES. [2024-06-04 15:15:11,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141234 conditions, 19532 events. 13401/19532 cut-off events. For 982065/982073 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 122417 event pairs, 4771 based on Foata normal form. 86/19520 useless extension candidates. Maximal degree in co-relation 141168. Up to 16146 conditions per place. [2024-06-04 15:15:11,677 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 252 selfloop transitions, 57 changer transitions 0/317 dead transitions. [2024-06-04 15:15:11,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 317 transitions, 4041 flow [2024-06-04 15:15:11,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-06-04 15:15:11,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432098765432098 [2024-06-04 15:15:11,679 INFO L175 Difference]: Start difference. First operand has 162 places, 237 transitions, 2645 flow. Second operand 9 states and 264 transitions. [2024-06-04 15:15:11,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 317 transitions, 4041 flow [2024-06-04 15:15:12,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 317 transitions, 3909 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:12,583 INFO L231 Difference]: Finished difference. Result has 167 places, 241 transitions, 2802 flow [2024-06-04 15:15:12,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2513, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2802, PETRI_PLACES=167, PETRI_TRANSITIONS=241} [2024-06-04 15:15:12,584 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 110 predicate places. [2024-06-04 15:15:12,584 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 241 transitions, 2802 flow [2024-06-04 15:15:12,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:12,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:12,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 15:15:12,584 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:15:12,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1243272065, now seen corresponding path program 3 times [2024-06-04 15:15:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268395000] [2024-06-04 15:15:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:12,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:13,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:13,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268395000] [2024-06-04 15:15:13,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268395000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:13,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:13,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:13,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259929365] [2024-06-04 15:15:13,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:13,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:13,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:14,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:15:14,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 241 transitions, 2802 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:14,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:14,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:15:14,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:17,443 INFO L124 PetriNetUnfolderBase]: 13830/20123 cut-off events. [2024-06-04 15:15:17,443 INFO L125 PetriNetUnfolderBase]: For 1039927/1039935 co-relation queries the response was YES. [2024-06-04 15:15:17,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145292 conditions, 20123 events. 13830/20123 cut-off events. For 1039927/1039935 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 126948 event pairs, 5042 based on Foata normal form. 100/20177 useless extension candidates. Maximal degree in co-relation 145223. Up to 17969 conditions per place. [2024-06-04 15:15:17,624 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 244 selfloop transitions, 57 changer transitions 0/309 dead transitions. [2024-06-04 15:15:17,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 309 transitions, 3854 flow [2024-06-04 15:15:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-04 15:15:17,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288065843621399 [2024-06-04 15:15:17,626 INFO L175 Difference]: Start difference. First operand has 167 places, 241 transitions, 2802 flow. Second operand 9 states and 257 transitions. [2024-06-04 15:15:17,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 309 transitions, 3854 flow [2024-06-04 15:15:18,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 309 transitions, 3728 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 15:15:18,583 INFO L231 Difference]: Finished difference. Result has 171 places, 243 transitions, 2895 flow [2024-06-04 15:15:18,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2895, PETRI_PLACES=171, PETRI_TRANSITIONS=243} [2024-06-04 15:15:18,584 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 114 predicate places. [2024-06-04 15:15:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 243 transitions, 2895 flow [2024-06-04 15:15:18,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:18,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:18,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 15:15:18,585 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:15:18,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:18,585 INFO L85 PathProgramCache]: Analyzing trace with hash 522331039, now seen corresponding path program 4 times [2024-06-04 15:15:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:18,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46559185] [2024-06-04 15:15:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:19,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:19,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46559185] [2024-06-04 15:15:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46559185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:19,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312196079] [2024-06-04 15:15:19,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:19,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:19,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:19,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:19,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:15:19,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 243 transitions, 2895 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:19,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:19,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:15:19,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:23,796 INFO L124 PetriNetUnfolderBase]: 14441/21115 cut-off events. [2024-06-04 15:15:23,796 INFO L125 PetriNetUnfolderBase]: For 1122604/1122616 co-relation queries the response was YES. [2024-06-04 15:15:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151819 conditions, 21115 events. 14441/21115 cut-off events. For 1122604/1122616 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 135440 event pairs, 5097 based on Foata normal form. 102/21159 useless extension candidates. Maximal degree in co-relation 151748. Up to 18034 conditions per place. [2024-06-04 15:15:24,028 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 186 selfloop transitions, 116 changer transitions 0/310 dead transitions. [2024-06-04 15:15:24,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 310 transitions, 4223 flow [2024-06-04 15:15:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:24,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 265 transitions. [2024-06-04 15:15:24,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452674897119342 [2024-06-04 15:15:24,030 INFO L175 Difference]: Start difference. First operand has 171 places, 243 transitions, 2895 flow. Second operand 9 states and 265 transitions. [2024-06-04 15:15:24,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 310 transitions, 4223 flow [2024-06-04 15:15:24,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 310 transitions, 4052 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 15:15:24,894 INFO L231 Difference]: Finished difference. Result has 173 places, 245 transitions, 3059 flow [2024-06-04 15:15:24,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3059, PETRI_PLACES=173, PETRI_TRANSITIONS=245} [2024-06-04 15:15:24,895 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 116 predicate places. [2024-06-04 15:15:24,895 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 245 transitions, 3059 flow [2024-06-04 15:15:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:24,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:15:24,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:15:24,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 15:15:24,895 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:15:24,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:15:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash -51265983, now seen corresponding path program 5 times [2024-06-04 15:15:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:15:24,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791147469] [2024-06-04 15:15:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:15:24,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:15:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:15:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:15:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:15:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791147469] [2024-06-04 15:15:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791147469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:15:26,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:15:26,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:15:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82618409] [2024-06-04 15:15:26,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:15:26,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:15:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:15:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:15:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:15:26,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:15:26,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 245 transitions, 3059 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:15:26,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:15:26,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:15:26,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:15:30,411 INFO L124 PetriNetUnfolderBase]: 15860/23338 cut-off events. [2024-06-04 15:15:30,412 INFO L125 PetriNetUnfolderBase]: For 1269117/1269129 co-relation queries the response was YES. [2024-06-04 15:15:30,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170597 conditions, 23338 events. 15860/23338 cut-off events. For 1269117/1269129 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 154139 event pairs, 5511 based on Foata normal form. 88/23368 useless extension candidates. Maximal degree in co-relation 170525. Up to 18089 conditions per place. [2024-06-04 15:15:30,678 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 198 selfloop transitions, 118 changer transitions 0/324 dead transitions. [2024-06-04 15:15:30,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 324 transitions, 4795 flow [2024-06-04 15:15:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:15:30,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:15:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 272 transitions. [2024-06-04 15:15:30,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596707818930041 [2024-06-04 15:15:30,680 INFO L175 Difference]: Start difference. First operand has 173 places, 245 transitions, 3059 flow. Second operand 9 states and 272 transitions. [2024-06-04 15:15:30,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 324 transitions, 4795 flow