./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix037.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/mix037.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix037.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix037.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-76401ed-m [2024-06-20 16:18:15,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:18:15,235 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:18:15,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:18:15,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:18:15,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:18:15,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:18:15,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:18:15,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:18:15,266 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:18:15,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:18:15,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:18:15,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:18:15,268 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:18:15,268 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:18:15,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:18:15,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:18:15,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:18:15,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:18:15,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:18:15,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:18:15,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:18:15,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:18:15,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:18:15,271 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:18:15,271 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:18:15,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:18:15,271 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:18:15,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:18:15,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:18:15,273 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:18:15,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:18:15,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:18:15,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:18:15,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:18:15,274 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:18:15,274 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:18:15,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:18:15,274 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:18:15,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:18:15,274 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:18:15,275 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:18:15,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:18:15,276 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:18:15,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:18:15,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:18:15,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:18:15,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:18:15,524 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:18:15,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix037.opt.i [2024-06-20 16:18:16,473 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:18:16,717 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:18:16,717 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix037.opt.i [2024-06-20 16:18:16,745 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c47efadc/28fad953f1b745869d5a2b2b33fe954e/FLAGa956b2ec2 [2024-06-20 16:18:16,755 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c47efadc/28fad953f1b745869d5a2b2b33fe954e [2024-06-20 16:18:16,758 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:18:16,759 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:18:16,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix037.opt.yml/witness.yml [2024-06-20 16:18:16,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:18:16,935 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:18:16,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:18:16,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:18:16,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:18:16,941 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:18:16" (1/2) ... [2024-06-20 16:18:16,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41489c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:18:16, skipping insertion in model container [2024-06-20 16:18:16,942 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:18:16" (1/2) ... [2024-06-20 16:18:16,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34407387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:18:16, skipping insertion in model container [2024-06-20 16:18:16,944 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:18:16" (2/2) ... [2024-06-20 16:18:16,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41489c20 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:16, skipping insertion in model container [2024-06-20 16:18:16,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:18:16" (2/2) ... [2024-06-20 16:18:16,945 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:18:17,044 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:18:17,045 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 <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_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 <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! 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$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:18:17,045 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || ((0 <= z$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$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$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) [2024-06-20 16:18:17,046 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 <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_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 <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! 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$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:18:17,046 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || ((0 <= z$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$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$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) [2024-06-20 16:18:17,046 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:18:17,047 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-20 16:18:17,082 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:18:17,388 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:18:17,403 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:18:17,526 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:18:17,555 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:18:17,558 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17 WrapperNode [2024-06-20 16:18:17,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:18:17,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:18:17,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:18:17,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:18:17,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,622 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-20 16:18:17,622 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:18:17,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:18:17,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:18:17,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:18:17,632 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,634 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,647 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:18:17,648 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,685 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,697 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:18:17,699 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:18:17,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:18:17,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:18:17,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (1/1) ... [2024-06-20 16:18:17,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:18:17,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:18:17,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:18:17,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:18:17,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:18:17,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:18:17,757 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:18:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:18:17,757 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:18:17,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:18:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:18:17,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:18:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:18:17,758 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:18:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:18:17,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:18:17,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:18:17,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:18:17,760 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:18:17,886 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:18:17,888 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:18:18,174 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:18:18,174 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:18:18,311 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:18:18,311 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:18:18,311 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:18:18 BoogieIcfgContainer [2024-06-20 16:18:18,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:18:18,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:18:18,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:18:18,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:18:18,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:18:16" (1/4) ... [2024-06-20 16:18:18,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5a436f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:18:18, skipping insertion in model container [2024-06-20 16:18:18,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:18:16" (2/4) ... [2024-06-20 16:18:18,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5a436f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:18:18, skipping insertion in model container [2024-06-20 16:18:18,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:18:17" (3/4) ... [2024-06-20 16:18:18,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5a436f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:18:18, skipping insertion in model container [2024-06-20 16:18:18,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:18:18" (4/4) ... [2024-06-20 16:18:18,318 INFO L112 eAbstractionObserver]: Analyzing ICFG mix037.opt.i [2024-06-20 16:18:18,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:18:18,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:18:18,330 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:18:18,369 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:18:18,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:18:18,415 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-20 16:18:18,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:18:18,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:18:18,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:18:18,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-20 16:18:18,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:18:18,431 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;@46ebe5ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:18:18,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:18:18,434 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:18:18,434 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:18:18,434 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:18:18,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:18,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:18:18,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:18,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:18,473 INFO L85 PathProgramCache]: Analyzing trace with hash 384691786, now seen corresponding path program 1 times [2024-06-20 16:18:18,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:18,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958506755] [2024-06-20 16:18:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:19,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:19,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958506755] [2024-06-20 16:18:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958506755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:19,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:18:19,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047875094] [2024-06-20 16:18:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:19,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:18:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:18:19,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:18:19,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-20 16:18:19,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:19,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:19,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-20 16:18:19,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:20,695 INFO L124 PetriNetUnfolderBase]: 6201/8973 cut-off events. [2024-06-20 16:18:20,695 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-20 16:18:20,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17729 conditions, 8973 events. 6201/8973 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 52004 event pairs, 4673 based on Foata normal form. 1/8645 useless extension candidates. Maximal degree in co-relation 17716. Up to 8487 conditions per place. [2024-06-20 16:18:20,745 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-20 16:18:20,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-20 16:18:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:18:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:18:20,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-20 16:18:20,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-20 16:18:20,757 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-20 16:18:20,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-20 16:18:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:18:20,764 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-20 16:18:20,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-20 16:18:20,769 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-20 16:18:20,769 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-20 16:18:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:20,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:20,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:20,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:18:20,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:20,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash 323025033, now seen corresponding path program 1 times [2024-06-20 16:18:20,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:20,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518160358] [2024-06-20 16:18:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:20,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:21,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518160358] [2024-06-20 16:18:21,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518160358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:21,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:21,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:18:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086812182] [2024-06-20 16:18:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:21,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:18:21,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:18:21,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:18:21,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-20 16:18:21,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:21,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:21,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-20 16:18:21,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:22,740 INFO L124 PetriNetUnfolderBase]: 7096/10020 cut-off events. [2024-06-20 16:18:22,741 INFO L125 PetriNetUnfolderBase]: For 1992/1992 co-relation queries the response was YES. [2024-06-20 16:18:22,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22758 conditions, 10020 events. 7096/10020 cut-off events. For 1992/1992 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 56678 event pairs, 4749 based on Foata normal form. 4/9846 useless extension candidates. Maximal degree in co-relation 22746. Up to 9657 conditions per place. [2024-06-20 16:18:22,790 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:18:22,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-20 16:18:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:18:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:18:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-20 16:18:22,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-20 16:18:22,792 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-20 16:18:22,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-20 16:18:22,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:18:22,795 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-20 16:18:22,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-20 16:18:22,795 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-20 16:18:22,796 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-20 16:18:22,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:22,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:22,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:22,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:18:22,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:22,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1423842189, now seen corresponding path program 1 times [2024-06-20 16:18:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:22,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056811957] [2024-06-20 16:18:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:23,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056811957] [2024-06-20 16:18:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056811957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:23,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:18:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046415419] [2024-06-20 16:18:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:18:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:18:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:18:23,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-20 16:18:23,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:23,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:23,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-20 16:18:23,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:24,595 INFO L124 PetriNetUnfolderBase]: 7114/10099 cut-off events. [2024-06-20 16:18:24,596 INFO L125 PetriNetUnfolderBase]: For 5738/5738 co-relation queries the response was YES. [2024-06-20 16:18:24,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25645 conditions, 10099 events. 7114/10099 cut-off events. For 5738/5738 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 57563 event pairs, 3563 based on Foata normal form. 7/9970 useless extension candidates. Maximal degree in co-relation 25631. Up to 9578 conditions per place. [2024-06-20 16:18:24,663 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/101 dead transitions. [2024-06-20 16:18:24,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 537 flow [2024-06-20 16:18:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:18:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:18:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-06-20 16:18:24,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566037735849056 [2024-06-20 16:18:24,669 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 174 transitions. [2024-06-20 16:18:24,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 537 flow [2024-06-20 16:18:24,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:18:24,674 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 312 flow [2024-06-20 16:18:24,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-20 16:18:24,676 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-20 16:18:24,676 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 312 flow [2024-06-20 16:18:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:24,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:24,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:24,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:18:24,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -58502996, now seen corresponding path program 1 times [2024-06-20 16:18:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699070294] [2024-06-20 16:18:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:25,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:25,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699070294] [2024-06-20 16:18:25,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699070294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:25,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:25,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:18:25,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975444720] [2024-06-20 16:18:25,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:25,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:18:25,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:18:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:18:25,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-20 16:18:25,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 312 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) [2024-06-20 16:18:25,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:25,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-20 16:18:25,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:26,636 INFO L124 PetriNetUnfolderBase]: 7256/10319 cut-off events. [2024-06-20 16:18:26,636 INFO L125 PetriNetUnfolderBase]: For 14087/14106 co-relation queries the response was YES. [2024-06-20 16:18:26,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30929 conditions, 10319 events. 7256/10319 cut-off events. For 14087/14106 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59123 event pairs, 2792 based on Foata normal form. 48/10229 useless extension candidates. Maximal degree in co-relation 30912. Up to 9570 conditions per place. [2024-06-20 16:18:26,701 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 80 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-20 16:18:26,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 114 transitions, 692 flow [2024-06-20 16:18:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:18:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:18:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-20 16:18:26,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-20 16:18:26,703 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 312 flow. Second operand 6 states and 204 transitions. [2024-06-20 16:18:26,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 114 transitions, 692 flow [2024-06-20 16:18:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:18:26,709 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 381 flow [2024-06-20 16:18:26,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-20 16:18:26,710 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2024-06-20 16:18:26,710 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 381 flow [2024-06-20 16:18:26,710 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) [2024-06-20 16:18:26,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:26,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:26,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:18:26,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:26,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash -288337099, now seen corresponding path program 1 times [2024-06-20 16:18:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:26,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039352413] [2024-06-20 16:18:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:26,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:27,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039352413] [2024-06-20 16:18:27,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039352413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:27,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:18:27,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360353365] [2024-06-20 16:18:27,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:18:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:18:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:18:27,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-20 16:18:27,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:27,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:27,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-20 16:18:27,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:28,518 INFO L124 PetriNetUnfolderBase]: 6342/9264 cut-off events. [2024-06-20 16:18:28,518 INFO L125 PetriNetUnfolderBase]: For 17897/17919 co-relation queries the response was YES. [2024-06-20 16:18:28,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29773 conditions, 9264 events. 6342/9264 cut-off events. For 17897/17919 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 54553 event pairs, 2937 based on Foata normal form. 3/9108 useless extension candidates. Maximal degree in co-relation 29752. Up to 8693 conditions per place. [2024-06-20 16:18:28,580 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 64 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-20 16:18:28,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 573 flow [2024-06-20 16:18:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:18:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:18:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 16:18:28,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 16:18:28,582 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 381 flow. Second operand 5 states and 140 transitions. [2024-06-20 16:18:28,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 573 flow [2024-06-20 16:18:28,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 512 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:18:28,588 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 351 flow [2024-06-20 16:18:28,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=351, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-06-20 16:18:28,589 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-20 16:18:28,589 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 351 flow [2024-06-20 16:18:28,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:28,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:28,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:28,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:18:28,590 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:28,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1534100530, now seen corresponding path program 1 times [2024-06-20 16:18:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:28,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016626902] [2024-06-20 16:18:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:29,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:29,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016626902] [2024-06-20 16:18:29,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016626902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:29,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:29,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:18:29,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081751873] [2024-06-20 16:18:29,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:18:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:18:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:18:29,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:29,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:29,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:29,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:29,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:30,879 INFO L124 PetriNetUnfolderBase]: 7260/10309 cut-off events. [2024-06-20 16:18:30,880 INFO L125 PetriNetUnfolderBase]: For 23865/23885 co-relation queries the response was YES. [2024-06-20 16:18:30,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33764 conditions, 10309 events. 7260/10309 cut-off events. For 23865/23885 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 58831 event pairs, 3413 based on Foata normal form. 24/10192 useless extension candidates. Maximal degree in co-relation 33741. Up to 9800 conditions per place. [2024-06-20 16:18:30,944 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 67 selfloop transitions, 25 changer transitions 0/101 dead transitions. [2024-06-20 16:18:30,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 672 flow [2024-06-20 16:18:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:18:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:18:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-20 16:18:30,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2024-06-20 16:18:30,946 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 351 flow. Second operand 6 states and 172 transitions. [2024-06-20 16:18:30,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 672 flow [2024-06-20 16:18:30,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 643 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:18:30,955 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 418 flow [2024-06-20 16:18:30,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-20 16:18:30,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-20 16:18:30,959 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 418 flow [2024-06-20 16:18:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:30,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:30,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:18:30,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:30,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1547194930, now seen corresponding path program 2 times [2024-06-20 16:18:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:30,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412756849] [2024-06-20 16:18:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:31,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:31,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412756849] [2024-06-20 16:18:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412756849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:31,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:18:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129484095] [2024-06-20 16:18:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:31,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:18:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:31,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:18:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:18:31,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:31,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:31,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:31,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:31,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:33,092 INFO L124 PetriNetUnfolderBase]: 7215/10236 cut-off events. [2024-06-20 16:18:33,092 INFO L125 PetriNetUnfolderBase]: For 28438/28460 co-relation queries the response was YES. [2024-06-20 16:18:33,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34450 conditions, 10236 events. 7215/10236 cut-off events. For 28438/28460 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 58308 event pairs, 3427 based on Foata normal form. 23/10112 useless extension candidates. Maximal degree in co-relation 34427. Up to 9731 conditions per place. [2024-06-20 16:18:33,141 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 60 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-20 16:18:33,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 652 flow [2024-06-20 16:18:33,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:18:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:18:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 16:18:33,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-20 16:18:33,143 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 418 flow. Second operand 6 states and 167 transitions. [2024-06-20 16:18:33,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 652 flow [2024-06-20 16:18:33,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 609 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:18:33,153 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 438 flow [2024-06-20 16:18:33,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=438, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2024-06-20 16:18:33,153 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-20 16:18:33,154 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 438 flow [2024-06-20 16:18:33,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:33,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:33,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:33,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:18:33,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:33,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 530386024, now seen corresponding path program 1 times [2024-06-20 16:18:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124653598] [2024-06-20 16:18:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124653598] [2024-06-20 16:18:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124653598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:34,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:34,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:18:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890028471] [2024-06-20 16:18:34,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:18:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:34,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:18:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:18:34,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:34,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 438 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:34,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:34,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:34,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:35,494 INFO L124 PetriNetUnfolderBase]: 8039/11515 cut-off events. [2024-06-20 16:18:35,494 INFO L125 PetriNetUnfolderBase]: For 35336/35336 co-relation queries the response was YES. [2024-06-20 16:18:35,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38740 conditions, 11515 events. 8039/11515 cut-off events. For 35336/35336 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 65910 event pairs, 3744 based on Foata normal form. 6/11378 useless extension candidates. Maximal degree in co-relation 38716. Up to 10907 conditions per place. [2024-06-20 16:18:35,555 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-20 16:18:35,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 110 transitions, 777 flow [2024-06-20 16:18:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:18:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:18:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 16:18:35,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-20 16:18:35,557 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 438 flow. Second operand 7 states and 188 transitions. [2024-06-20 16:18:35,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 110 transitions, 777 flow [2024-06-20 16:18:35,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 686 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:18:35,579 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 459 flow [2024-06-20 16:18:35,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-20 16:18:35,580 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-20 16:18:35,580 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 459 flow [2024-06-20 16:18:35,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:35,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:35,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:35,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:18:35,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:35,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -165796894, now seen corresponding path program 1 times [2024-06-20 16:18:35,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:35,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929106939] [2024-06-20 16:18:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:35,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:36,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:36,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929106939] [2024-06-20 16:18:36,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929106939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:36,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:36,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:18:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258869561] [2024-06-20 16:18:36,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:36,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:18:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:18:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:18:36,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:36,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 459 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:36,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:36,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:36,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:37,580 INFO L124 PetriNetUnfolderBase]: 8025/11897 cut-off events. [2024-06-20 16:18:37,580 INFO L125 PetriNetUnfolderBase]: For 44827/44827 co-relation queries the response was YES. [2024-06-20 16:18:37,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41593 conditions, 11897 events. 8025/11897 cut-off events. For 44827/44827 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 71432 event pairs, 3811 based on Foata normal form. 4/11883 useless extension candidates. Maximal degree in co-relation 41567. Up to 10931 conditions per place. [2024-06-20 16:18:37,646 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 78 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2024-06-20 16:18:37,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 705 flow [2024-06-20 16:18:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:18:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:18:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-20 16:18:37,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-20 16:18:37,648 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 459 flow. Second operand 5 states and 133 transitions. [2024-06-20 16:18:37,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 705 flow [2024-06-20 16:18:37,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 657 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:18:37,672 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 480 flow [2024-06-20 16:18:37,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-20 16:18:37,672 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-20 16:18:37,673 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 480 flow [2024-06-20 16:18:37,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:37,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:37,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:37,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:18:37,673 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:37,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:37,674 INFO L85 PathProgramCache]: Analyzing trace with hash -475204019, now seen corresponding path program 1 times [2024-06-20 16:18:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:37,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697778602] [2024-06-20 16:18:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:37,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:38,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697778602] [2024-06-20 16:18:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697778602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:38,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:18:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859374375] [2024-06-20 16:18:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:18:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:18:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:18:38,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:38,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 480 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) [2024-06-20 16:18:38,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:38,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:38,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:40,106 INFO L124 PetriNetUnfolderBase]: 9156/13036 cut-off events. [2024-06-20 16:18:40,106 INFO L125 PetriNetUnfolderBase]: For 68131/68223 co-relation queries the response was YES. [2024-06-20 16:18:40,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49987 conditions, 13036 events. 9156/13036 cut-off events. For 68131/68223 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 76012 event pairs, 3617 based on Foata normal form. 54/13034 useless extension candidates. Maximal degree in co-relation 49960. Up to 11790 conditions per place. [2024-06-20 16:18:40,180 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 89 selfloop transitions, 32 changer transitions 0/131 dead transitions. [2024-06-20 16:18:40,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 946 flow [2024-06-20 16:18:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:18:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:18:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-20 16:18:40,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444743935309974 [2024-06-20 16:18:40,182 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 480 flow. Second operand 7 states and 202 transitions. [2024-06-20 16:18:40,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 946 flow [2024-06-20 16:18:40,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 907 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:18:40,202 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 570 flow [2024-06-20 16:18:40,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=570, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-20 16:18:40,203 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-20 16:18:40,203 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 570 flow [2024-06-20 16:18:40,203 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) [2024-06-20 16:18:40,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:40,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:40,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:18:40,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:40,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -176754035, now seen corresponding path program 2 times [2024-06-20 16:18:40,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:40,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366984699] [2024-06-20 16:18:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:40,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:41,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:41,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366984699] [2024-06-20 16:18:41,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366984699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:41,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:41,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:18:41,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797793438] [2024-06-20 16:18:41,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:41,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:18:41,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:18:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:18:41,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:41,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 570 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) [2024-06-20 16:18:41,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:41,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:41,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:42,770 INFO L124 PetriNetUnfolderBase]: 9269/13227 cut-off events. [2024-06-20 16:18:42,770 INFO L125 PetriNetUnfolderBase]: For 82762/82854 co-relation queries the response was YES. [2024-06-20 16:18:42,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52791 conditions, 13227 events. 9269/13227 cut-off events. For 82762/82854 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 77504 event pairs, 4154 based on Foata normal form. 87/13257 useless extension candidates. Maximal degree in co-relation 52763. Up to 12362 conditions per place. [2024-06-20 16:18:42,983 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 86 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-20 16:18:42,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 940 flow [2024-06-20 16:18:42,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:18:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:18:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-20 16:18:42,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-20 16:18:42,985 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 570 flow. Second operand 7 states and 198 transitions. [2024-06-20 16:18:42,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 940 flow [2024-06-20 16:18:43,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 893 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:18:43,019 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 638 flow [2024-06-20 16:18:43,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-20 16:18:43,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-20 16:18:43,020 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 638 flow [2024-06-20 16:18:43,020 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) [2024-06-20 16:18:43,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:43,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:43,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:18:43,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:43,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash -428406719, now seen corresponding path program 1 times [2024-06-20 16:18:43,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:43,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665532773] [2024-06-20 16:18:43,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:43,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:43,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:43,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665532773] [2024-06-20 16:18:43,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665532773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:43,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:43,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:18:43,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504423923] [2024-06-20 16:18:43,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:43,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:18:43,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:18:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:18:44,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:18:44,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 638 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:44,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:44,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:18:44,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:45,656 INFO L124 PetriNetUnfolderBase]: 9615/13642 cut-off events. [2024-06-20 16:18:45,656 INFO L125 PetriNetUnfolderBase]: For 94229/94229 co-relation queries the response was YES. [2024-06-20 16:18:45,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56308 conditions, 13642 events. 9615/13642 cut-off events. For 94229/94229 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 77220 event pairs, 4323 based on Foata normal form. 4/13611 useless extension candidates. Maximal degree in co-relation 56278. Up to 13042 conditions per place. [2024-06-20 16:18:45,750 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 97 selfloop transitions, 21 changer transitions 0/126 dead transitions. [2024-06-20 16:18:45,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1070 flow [2024-06-20 16:18:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:18:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:18:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-20 16:18:45,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-20 16:18:45,753 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 638 flow. Second operand 6 states and 163 transitions. [2024-06-20 16:18:45,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1070 flow [2024-06-20 16:18:45,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 991 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:18:45,817 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 698 flow [2024-06-20 16:18:45,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=698, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-20 16:18:45,817 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-20 16:18:45,817 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 698 flow [2024-06-20 16:18:45,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:45,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:45,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:45,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:18:45,818 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)] === [2024-06-20 16:18:45,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash 427222243, now seen corresponding path program 1 times [2024-06-20 16:18:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:45,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290905764] [2024-06-20 16:18:45,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:45,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:46,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290905764] [2024-06-20 16:18:46,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290905764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:46,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:46,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:18:46,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438471521] [2024-06-20 16:18:46,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:46,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:18:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:18:46,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:18:47,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:18:47,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 698 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:47,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:47,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:18:47,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:48,721 INFO L124 PetriNetUnfolderBase]: 9673/13720 cut-off events. [2024-06-20 16:18:48,722 INFO L125 PetriNetUnfolderBase]: For 112207/112207 co-relation queries the response was YES. [2024-06-20 16:18:48,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59296 conditions, 13720 events. 9673/13720 cut-off events. For 112207/112207 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 77774 event pairs, 4116 based on Foata normal form. 6/13683 useless extension candidates. Maximal degree in co-relation 59265. Up to 12941 conditions per place. [2024-06-20 16:18:48,813 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 100 selfloop transitions, 44 changer transitions 0/152 dead transitions. [2024-06-20 16:18:48,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1217 flow [2024-06-20 16:18:48,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:18:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:18:48,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 16:18:48,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-20 16:18:48,816 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 698 flow. Second operand 8 states and 215 transitions. [2024-06-20 16:18:48,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1217 flow [2024-06-20 16:18:48,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 152 transitions, 1175 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-20 16:18:48,881 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 903 flow [2024-06-20 16:18:48,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=903, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-20 16:18:48,881 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-20 16:18:48,881 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 903 flow [2024-06-20 16:18:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:48,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:48,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:48,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:18:48,882 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:48,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:48,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1636579287, now seen corresponding path program 2 times [2024-06-20 16:18:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:48,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389119744] [2024-06-20 16:18:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:48,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389119744] [2024-06-20 16:18:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389119744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:49,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:18:49,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768076985] [2024-06-20 16:18:49,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:49,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:18:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:18:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:18:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:18:50,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 903 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:50,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:50,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:18:50,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:51,792 INFO L124 PetriNetUnfolderBase]: 9658/13703 cut-off events. [2024-06-20 16:18:51,792 INFO L125 PetriNetUnfolderBase]: For 128595/128595 co-relation queries the response was YES. [2024-06-20 16:18:51,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61771 conditions, 13703 events. 9658/13703 cut-off events. For 128595/128595 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 77678 event pairs, 4113 based on Foata normal form. 6/13667 useless extension candidates. Maximal degree in co-relation 61737. Up to 12920 conditions per place. [2024-06-20 16:18:51,896 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 104 selfloop transitions, 44 changer transitions 0/156 dead transitions. [2024-06-20 16:18:51,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1362 flow [2024-06-20 16:18:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:18:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:18:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 16:18:51,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-20 16:18:51,897 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 903 flow. Second operand 8 states and 215 transitions. [2024-06-20 16:18:51,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1362 flow [2024-06-20 16:18:51,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 156 transitions, 1274 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 16:18:51,999 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 990 flow [2024-06-20 16:18:52,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2024-06-20 16:18:52,000 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-20 16:18:52,000 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 990 flow [2024-06-20 16:18:52,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:52,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:52,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:52,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:18:52,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:52,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1400107257, now seen corresponding path program 3 times [2024-06-20 16:18:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884467440] [2024-06-20 16:18:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884467440] [2024-06-20 16:18:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884467440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:53,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:18:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493333976] [2024-06-20 16:18:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:18:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:18:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:18:53,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:18:53,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 990 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:53,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:53,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:18:53,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:54,714 INFO L124 PetriNetUnfolderBase]: 9735/13834 cut-off events. [2024-06-20 16:18:54,714 INFO L125 PetriNetUnfolderBase]: For 143329/143329 co-relation queries the response was YES. [2024-06-20 16:18:54,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63029 conditions, 13834 events. 9735/13834 cut-off events. For 143329/143329 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 78619 event pairs, 3700 based on Foata normal form. 6/13797 useless extension candidates. Maximal degree in co-relation 62993. Up to 12759 conditions per place. [2024-06-20 16:18:54,810 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 101 selfloop transitions, 56 changer transitions 0/165 dead transitions. [2024-06-20 16:18:54,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1482 flow [2024-06-20 16:18:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:18:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:18:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-20 16:18:54,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165094339622641 [2024-06-20 16:18:54,811 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 990 flow. Second operand 8 states and 219 transitions. [2024-06-20 16:18:54,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1482 flow [2024-06-20 16:18:54,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 165 transitions, 1358 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 16:18:54,899 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 1077 flow [2024-06-20 16:18:54,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1077, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-06-20 16:18:54,899 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-20 16:18:54,899 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 1077 flow [2024-06-20 16:18:54,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:54,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:54,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:54,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:18:54,900 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)] === [2024-06-20 16:18:54,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:54,900 INFO L85 PathProgramCache]: Analyzing trace with hash -428078429, now seen corresponding path program 2 times [2024-06-20 16:18:54,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:54,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668674654] [2024-06-20 16:18:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:55,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:55,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668674654] [2024-06-20 16:18:55,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668674654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:55,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:55,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:18:55,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069870298] [2024-06-20 16:18:55,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:55,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:18:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:55,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:18:55,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:18:55,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:18:55,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 1077 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:55,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:55,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:18:55,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:18:57,426 INFO L124 PetriNetUnfolderBase]: 9721/13847 cut-off events. [2024-06-20 16:18:57,426 INFO L125 PetriNetUnfolderBase]: For 163516/163531 co-relation queries the response was YES. [2024-06-20 16:18:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65534 conditions, 13847 events. 9721/13847 cut-off events. For 163516/163531 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78927 event pairs, 4077 based on Foata normal form. 14/13826 useless extension candidates. Maximal degree in co-relation 65496. Up to 13210 conditions per place. [2024-06-20 16:18:57,508 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 112 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-20 16:18:57,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1393 flow [2024-06-20 16:18:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:18:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:18:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 16:18:57,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-20 16:18:57,509 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 1077 flow. Second operand 6 states and 154 transitions. [2024-06-20 16:18:57,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1393 flow [2024-06-20 16:18:57,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1242 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:18:57,608 INFO L231 Difference]: Finished difference. Result has 104 places, 121 transitions, 977 flow [2024-06-20 16:18:57,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=977, PETRI_PLACES=104, PETRI_TRANSITIONS=121} [2024-06-20 16:18:57,609 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-20 16:18:57,609 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 121 transitions, 977 flow [2024-06-20 16:18:57,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:57,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:57,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:18:57,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:18:57,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash -422686847, now seen corresponding path program 1 times [2024-06-20 16:18:57,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:57,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199530637] [2024-06-20 16:18:57,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:57,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:58,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:58,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199530637] [2024-06-20 16:18:58,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199530637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:58,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:58,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:18:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835462474] [2024-06-20 16:18:58,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:58,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:18:58,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:58,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:18:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:18:58,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:18:58,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 121 transitions, 977 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:58,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:58,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:18:58,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:00,000 INFO L124 PetriNetUnfolderBase]: 8603/12553 cut-off events. [2024-06-20 16:19:00,001 INFO L125 PetriNetUnfolderBase]: For 153598/153598 co-relation queries the response was YES. [2024-06-20 16:19:00,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59120 conditions, 12553 events. 8603/12553 cut-off events. For 153598/153598 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 73937 event pairs, 3492 based on Foata normal form. 4/12492 useless extension candidates. Maximal degree in co-relation 59081. Up to 11727 conditions per place. [2024-06-20 16:19:00,084 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 125 selfloop transitions, 21 changer transitions 0/155 dead transitions. [2024-06-20 16:19:00,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 155 transitions, 1477 flow [2024-06-20 16:19:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:19:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:19:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-20 16:19:00,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-20 16:19:00,089 INFO L175 Difference]: Start difference. First operand has 104 places, 121 transitions, 977 flow. Second operand 6 states and 165 transitions. [2024-06-20 16:19:00,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 155 transitions, 1477 flow [2024-06-20 16:19:00,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1418 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:19:00,182 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1057 flow [2024-06-20 16:19:00,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1057, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-20 16:19:00,183 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-20 16:19:00,183 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1057 flow [2024-06-20 16:19:00,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:00,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:00,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:00,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:19:00,183 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:00,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 441901603, now seen corresponding path program 2 times [2024-06-20 16:19:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427519029] [2024-06-20 16:19:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:01,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427519029] [2024-06-20 16:19:01,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427519029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:01,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:01,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:19:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713271139] [2024-06-20 16:19:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:01,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:19:01,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:19:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:19:01,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:19:01,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1057 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:01,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:01,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:19:01,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:02,577 INFO L124 PetriNetUnfolderBase]: 8589/12543 cut-off events. [2024-06-20 16:19:02,577 INFO L125 PetriNetUnfolderBase]: For 172502/172508 co-relation queries the response was YES. [2024-06-20 16:19:02,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61676 conditions, 12543 events. 8589/12543 cut-off events. For 172502/172508 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 74017 event pairs, 3469 based on Foata normal form. 8/12491 useless extension candidates. Maximal degree in co-relation 61636. Up to 11715 conditions per place. [2024-06-20 16:19:02,668 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 119 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-06-20 16:19:02,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1387 flow [2024-06-20 16:19:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:19:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:19:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 16:19:02,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:19:02,670 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1057 flow. Second operand 6 states and 159 transitions. [2024-06-20 16:19:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1387 flow [2024-06-20 16:19:02,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1321 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 16:19:02,798 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1042 flow [2024-06-20 16:19:02,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1042, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2024-06-20 16:19:02,798 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-20 16:19:02,799 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1042 flow [2024-06-20 16:19:02,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:02,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:02,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:19:02,799 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:02,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash -396003423, now seen corresponding path program 1 times [2024-06-20 16:19:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:02,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112603014] [2024-06-20 16:19:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:03,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:03,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112603014] [2024-06-20 16:19:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112603014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:03,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141603723] [2024-06-20 16:19:03,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:03,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:03,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:03,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1042 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:03,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:03,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:03,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:05,726 INFO L124 PetriNetUnfolderBase]: 9849/14019 cut-off events. [2024-06-20 16:19:05,726 INFO L125 PetriNetUnfolderBase]: For 218121/218127 co-relation queries the response was YES. [2024-06-20 16:19:05,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70720 conditions, 14019 events. 9849/14019 cut-off events. For 218121/218127 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79844 event pairs, 3955 based on Foata normal form. 12/13983 useless extension candidates. Maximal degree in co-relation 70678. Up to 13008 conditions per place. [2024-06-20 16:19:05,851 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 129 selfloop transitions, 52 changer transitions 0/189 dead transitions. [2024-06-20 16:19:05,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 1836 flow [2024-06-20 16:19:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-20 16:19:05,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-20 16:19:05,853 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1042 flow. Second operand 7 states and 200 transitions. [2024-06-20 16:19:05,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 189 transitions, 1836 flow [2024-06-20 16:19:05,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 189 transitions, 1781 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:19:06,000 INFO L231 Difference]: Finished difference. Result has 113 places, 147 transitions, 1346 flow [2024-06-20 16:19:06,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1346, PETRI_PLACES=113, PETRI_TRANSITIONS=147} [2024-06-20 16:19:06,001 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-20 16:19:06,001 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 147 transitions, 1346 flow [2024-06-20 16:19:06,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:06,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:06,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:06,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:19:06,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:06,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1821896025, now seen corresponding path program 1 times [2024-06-20 16:19:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:06,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411023039] [2024-06-20 16:19:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411023039] [2024-06-20 16:19:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411023039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:07,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:19:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416876768] [2024-06-20 16:19:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:19:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:19:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:19:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 147 transitions, 1346 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) [2024-06-20 16:19:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:09,000 INFO L124 PetriNetUnfolderBase]: 10091/14401 cut-off events. [2024-06-20 16:19:09,000 INFO L125 PetriNetUnfolderBase]: For 254292/254295 co-relation queries the response was YES. [2024-06-20 16:19:09,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77151 conditions, 14401 events. 10091/14401 cut-off events. For 254292/254295 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 82759 event pairs, 4079 based on Foata normal form. 18/14369 useless extension candidates. Maximal degree in co-relation 77106. Up to 13080 conditions per place. [2024-06-20 16:19:09,118 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 53 changer transitions 0/204 dead transitions. [2024-06-20 16:19:09,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 204 transitions, 1969 flow [2024-06-20 16:19:09,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:19:09,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:19:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-20 16:19:09,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-20 16:19:09,120 INFO L175 Difference]: Start difference. First operand has 113 places, 147 transitions, 1346 flow. Second operand 8 states and 220 transitions. [2024-06-20 16:19:09,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 204 transitions, 1969 flow [2024-06-20 16:19:09,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 204 transitions, 1873 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 16:19:09,318 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1513 flow [2024-06-20 16:19:09,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1513, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-20 16:19:09,319 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-20 16:19:09,319 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1513 flow [2024-06-20 16:19:09,319 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) [2024-06-20 16:19:09,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:09,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:19:09,319 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:09,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash -395704893, now seen corresponding path program 2 times [2024-06-20 16:19:09,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:09,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347555028] [2024-06-20 16:19:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:10,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:10,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347555028] [2024-06-20 16:19:10,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347555028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:10,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:10,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875842295] [2024-06-20 16:19:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:10,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:10,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1513 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:10,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:10,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:10,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:12,207 INFO L124 PetriNetUnfolderBase]: 10257/14647 cut-off events. [2024-06-20 16:19:12,208 INFO L125 PetriNetUnfolderBase]: For 273220/273226 co-relation queries the response was YES. [2024-06-20 16:19:12,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79519 conditions, 14647 events. 10257/14647 cut-off events. For 273220/273226 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 84262 event pairs, 4003 based on Foata normal form. 12/14611 useless extension candidates. Maximal degree in co-relation 79471. Up to 13498 conditions per place. [2024-06-20 16:19:12,345 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 136 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-20 16:19:12,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2273 flow [2024-06-20 16:19:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 16:19:12,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-20 16:19:12,346 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1513 flow. Second operand 7 states and 194 transitions. [2024-06-20 16:19:12,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2273 flow [2024-06-20 16:19:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 202 transitions, 2185 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 16:19:12,612 INFO L231 Difference]: Finished difference. Result has 125 places, 166 transitions, 1697 flow [2024-06-20 16:19:12,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1697, PETRI_PLACES=125, PETRI_TRANSITIONS=166} [2024-06-20 16:19:12,613 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-20 16:19:12,613 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 166 transitions, 1697 flow [2024-06-20 16:19:12,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:12,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:12,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:12,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:19:12,613 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:12,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1098875205, now seen corresponding path program 2 times [2024-06-20 16:19:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:12,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663880430] [2024-06-20 16:19:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:13,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:13,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663880430] [2024-06-20 16:19:13,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663880430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:13,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:13,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:19:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462125181] [2024-06-20 16:19:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:13,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:19:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:19:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:19:13,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:13,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 166 transitions, 1697 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) [2024-06-20 16:19:13,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:13,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:13,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:15,574 INFO L124 PetriNetUnfolderBase]: 10218/14571 cut-off events. [2024-06-20 16:19:15,574 INFO L125 PetriNetUnfolderBase]: For 292648/292651 co-relation queries the response was YES. [2024-06-20 16:19:15,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79981 conditions, 14571 events. 10218/14571 cut-off events. For 292648/292651 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83629 event pairs, 2988 based on Foata normal form. 18/14529 useless extension candidates. Maximal degree in co-relation 79931. Up to 12561 conditions per place. [2024-06-20 16:19:15,713 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 139 selfloop transitions, 61 changer transitions 0/208 dead transitions. [2024-06-20 16:19:15,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2215 flow [2024-06-20 16:19:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-20 16:19:15,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 16:19:15,717 INFO L175 Difference]: Start difference. First operand has 125 places, 166 transitions, 1697 flow. Second operand 7 states and 196 transitions. [2024-06-20 16:19:15,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2215 flow [2024-06-20 16:19:16,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 208 transitions, 2095 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:19:16,035 INFO L231 Difference]: Finished difference. Result has 129 places, 166 transitions, 1712 flow [2024-06-20 16:19:16,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=129, PETRI_TRANSITIONS=166} [2024-06-20 16:19:16,036 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-20 16:19:16,036 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 166 transitions, 1712 flow [2024-06-20 16:19:16,036 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) [2024-06-20 16:19:16,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:16,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:16,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:19:16,037 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:16,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1089678435, now seen corresponding path program 3 times [2024-06-20 16:19:16,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:16,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448353667] [2024-06-20 16:19:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:16,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:17,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:17,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448353667] [2024-06-20 16:19:17,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448353667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:17,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:17,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:19:17,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063039174] [2024-06-20 16:19:17,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:17,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:19:17,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:19:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:19:17,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:17,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 166 transitions, 1712 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) [2024-06-20 16:19:17,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:17,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:18,810 INFO L124 PetriNetUnfolderBase]: 10179/14528 cut-off events. [2024-06-20 16:19:18,810 INFO L125 PetriNetUnfolderBase]: For 310573/310576 co-relation queries the response was YES. [2024-06-20 16:19:18,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80281 conditions, 14528 events. 10179/14528 cut-off events. For 310573/310576 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83313 event pairs, 2511 based on Foata normal form. 18/14487 useless extension candidates. Maximal degree in co-relation 80230. Up to 12322 conditions per place. [2024-06-20 16:19:18,948 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 133 selfloop transitions, 63 changer transitions 0/204 dead transitions. [2024-06-20 16:19:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 204 transitions, 2216 flow [2024-06-20 16:19:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 16:19:18,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-20 16:19:18,950 INFO L175 Difference]: Start difference. First operand has 129 places, 166 transitions, 1712 flow. Second operand 7 states and 189 transitions. [2024-06-20 16:19:18,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 204 transitions, 2216 flow [2024-06-20 16:19:19,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 204 transitions, 2054 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:19:19,247 INFO L231 Difference]: Finished difference. Result has 129 places, 167 transitions, 1695 flow [2024-06-20 16:19:19,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=129, PETRI_TRANSITIONS=167} [2024-06-20 16:19:19,247 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-20 16:19:19,247 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 167 transitions, 1695 flow [2024-06-20 16:19:19,247 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) [2024-06-20 16:19:19,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:19,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:19,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:19:19,247 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:19,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash -448748315, now seen corresponding path program 3 times [2024-06-20 16:19:19,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:19,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499638936] [2024-06-20 16:19:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:19,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:20,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:20,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499638936] [2024-06-20 16:19:20,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499638936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:20,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:20,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:20,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377376215] [2024-06-20 16:19:20,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:20,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:20,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:20,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:20,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:20,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 167 transitions, 1695 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:20,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:20,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:20,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:22,164 INFO L124 PetriNetUnfolderBase]: 10161/14516 cut-off events. [2024-06-20 16:19:22,165 INFO L125 PetriNetUnfolderBase]: For 308066/308081 co-relation queries the response was YES. [2024-06-20 16:19:22,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80566 conditions, 14516 events. 10161/14516 cut-off events. For 308066/308081 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 83420 event pairs, 3989 based on Foata normal form. 18/14479 useless extension candidates. Maximal degree in co-relation 80514. Up to 13376 conditions per place. [2024-06-20 16:19:22,297 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 58 changer transitions 0/196 dead transitions. [2024-06-20 16:19:22,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 196 transitions, 2317 flow [2024-06-20 16:19:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 16:19:22,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-20 16:19:22,298 INFO L175 Difference]: Start difference. First operand has 129 places, 167 transitions, 1695 flow. Second operand 7 states and 187 transitions. [2024-06-20 16:19:22,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 196 transitions, 2317 flow [2024-06-20 16:19:22,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 196 transitions, 2142 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-20 16:19:22,597 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1647 flow [2024-06-20 16:19:22,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-06-20 16:19:22,598 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-20 16:19:22,598 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1647 flow [2024-06-20 16:19:22,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:22,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:22,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:22,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:19:22,598 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:22,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1264614931, now seen corresponding path program 1 times [2024-06-20 16:19:22,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:22,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327352173] [2024-06-20 16:19:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327352173] [2024-06-20 16:19:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327352173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:23,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:23,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529314748] [2024-06-20 16:19:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:23,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:23,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:19:23,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1647 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:23,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:23,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:19:23,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:25,386 INFO L124 PetriNetUnfolderBase]: 9043/13208 cut-off events. [2024-06-20 16:19:25,386 INFO L125 PetriNetUnfolderBase]: For 281221/281221 co-relation queries the response was YES. [2024-06-20 16:19:25,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72694 conditions, 13208 events. 9043/13208 cut-off events. For 281221/281221 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 78274 event pairs, 3499 based on Foata normal form. 4/13138 useless extension candidates. Maximal degree in co-relation 72641. Up to 12371 conditions per place. [2024-06-20 16:19:25,512 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 173 selfloop transitions, 18 changer transitions 0/200 dead transitions. [2024-06-20 16:19:25,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 200 transitions, 2155 flow [2024-06-20 16:19:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 16:19:25,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-20 16:19:25,514 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1647 flow. Second operand 7 states and 184 transitions. [2024-06-20 16:19:25,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 200 transitions, 2155 flow [2024-06-20 16:19:25,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 200 transitions, 1998 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-20 16:19:25,789 INFO L231 Difference]: Finished difference. Result has 132 places, 171 transitions, 1595 flow [2024-06-20 16:19:25,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1595, PETRI_PLACES=132, PETRI_TRANSITIONS=171} [2024-06-20 16:19:25,789 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-20 16:19:25,789 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 171 transitions, 1595 flow [2024-06-20 16:19:25,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:25,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:25,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:25,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:19:25,790 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:25,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:25,790 INFO L85 PathProgramCache]: Analyzing trace with hash -218388675, now seen corresponding path program 2 times [2024-06-20 16:19:25,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:25,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124751921] [2024-06-20 16:19:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:26,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:26,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124751921] [2024-06-20 16:19:26,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124751921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:26,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:26,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475700988] [2024-06-20 16:19:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:26,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:26,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:26,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:19:26,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 171 transitions, 1595 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:26,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:26,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:19:26,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:28,610 INFO L124 PetriNetUnfolderBase]: 9075/13295 cut-off events. [2024-06-20 16:19:28,611 INFO L125 PetriNetUnfolderBase]: For 303883/303883 co-relation queries the response was YES. [2024-06-20 16:19:28,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74748 conditions, 13295 events. 9075/13295 cut-off events. For 303883/303883 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 79189 event pairs, 3438 based on Foata normal form. 4/13226 useless extension candidates. Maximal degree in co-relation 74696. Up to 12302 conditions per place. [2024-06-20 16:19:28,745 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 166 selfloop transitions, 35 changer transitions 0/210 dead transitions. [2024-06-20 16:19:28,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2289 flow [2024-06-20 16:19:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-20 16:19:28,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121293800539084 [2024-06-20 16:19:28,748 INFO L175 Difference]: Start difference. First operand has 132 places, 171 transitions, 1595 flow. Second operand 7 states and 190 transitions. [2024-06-20 16:19:28,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2289 flow [2024-06-20 16:19:29,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2214 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:19:29,060 INFO L231 Difference]: Finished difference. Result has 134 places, 179 transitions, 1727 flow [2024-06-20 16:19:29,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1727, PETRI_PLACES=134, PETRI_TRANSITIONS=179} [2024-06-20 16:19:29,061 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-20 16:19:29,061 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 179 transitions, 1727 flow [2024-06-20 16:19:29,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:29,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:29,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:29,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:19:29,061 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)] === [2024-06-20 16:19:29,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:29,062 INFO L85 PathProgramCache]: Analyzing trace with hash 814049499, now seen corresponding path program 3 times [2024-06-20 16:19:29,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:29,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947352772] [2024-06-20 16:19:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:29,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:29,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:29,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947352772] [2024-06-20 16:19:29,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947352772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:29,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:29,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354237724] [2024-06-20 16:19:29,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:29,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:29,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:29,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:29,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:30,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:19:30,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 179 transitions, 1727 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:30,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:30,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:19:30,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:31,878 INFO L124 PetriNetUnfolderBase]: 9061/13283 cut-off events. [2024-06-20 16:19:31,878 INFO L125 PetriNetUnfolderBase]: For 330605/330608 co-relation queries the response was YES. [2024-06-20 16:19:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77209 conditions, 13283 events. 9061/13283 cut-off events. For 330605/330608 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79049 event pairs, 3396 based on Foata normal form. 4/13221 useless extension candidates. Maximal degree in co-relation 77156. Up to 12290 conditions per place. [2024-06-20 16:19:32,004 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 160 selfloop transitions, 35 changer transitions 0/204 dead transitions. [2024-06-20 16:19:32,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 204 transitions, 2179 flow [2024-06-20 16:19:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 16:19:32,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-20 16:19:32,005 INFO L175 Difference]: Start difference. First operand has 134 places, 179 transitions, 1727 flow. Second operand 7 states and 184 transitions. [2024-06-20 16:19:32,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 204 transitions, 2179 flow [2024-06-20 16:19:32,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 204 transitions, 2071 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 16:19:32,335 INFO L231 Difference]: Finished difference. Result has 138 places, 179 transitions, 1698 flow [2024-06-20 16:19:32,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1698, PETRI_PLACES=138, PETRI_TRANSITIONS=179} [2024-06-20 16:19:32,336 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-20 16:19:32,336 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 179 transitions, 1698 flow [2024-06-20 16:19:32,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:32,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:32,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:32,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:19:32,336 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:32,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:32,337 INFO L85 PathProgramCache]: Analyzing trace with hash -41010891, now seen corresponding path program 1 times [2024-06-20 16:19:32,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:32,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460386523] [2024-06-20 16:19:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:32,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:33,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:33,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460386523] [2024-06-20 16:19:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460386523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582796060] [2024-06-20 16:19:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:33,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:19:33,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 179 transitions, 1698 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:33,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:33,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:19:33,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:35,464 INFO L124 PetriNetUnfolderBase]: 9049/13269 cut-off events. [2024-06-20 16:19:35,464 INFO L125 PetriNetUnfolderBase]: For 348745/348745 co-relation queries the response was YES. [2024-06-20 16:19:35,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77318 conditions, 13269 events. 9049/13269 cut-off events. For 348745/348745 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 79012 event pairs, 3412 based on Foata normal form. 4/13209 useless extension candidates. Maximal degree in co-relation 77263. Up to 12391 conditions per place. [2024-06-20 16:19:35,580 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 183 selfloop transitions, 17 changer transitions 0/209 dead transitions. [2024-06-20 16:19:35,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 209 transitions, 2252 flow [2024-06-20 16:19:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 16:19:35,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-20 16:19:35,581 INFO L175 Difference]: Start difference. First operand has 138 places, 179 transitions, 1698 flow. Second operand 7 states and 177 transitions. [2024-06-20 16:19:35,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 209 transitions, 2252 flow [2024-06-20 16:19:36,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2135 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:19:36,056 INFO L231 Difference]: Finished difference. Result has 139 places, 186 transitions, 1732 flow [2024-06-20 16:19:36,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1732, PETRI_PLACES=139, PETRI_TRANSITIONS=186} [2024-06-20 16:19:36,057 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-20 16:19:36,057 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 186 transitions, 1732 flow [2024-06-20 16:19:36,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:36,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:36,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:36,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:19:36,058 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:36,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1340878595, now seen corresponding path program 1 times [2024-06-20 16:19:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:36,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593307480] [2024-06-20 16:19:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:36,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:36,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593307480] [2024-06-20 16:19:36,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593307480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:36,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:36,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:19:36,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565144217] [2024-06-20 16:19:36,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:19:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:19:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:19:37,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-20 16:19:37,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 186 transitions, 1732 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:37,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:37,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-20 16:19:37,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:38,614 INFO L124 PetriNetUnfolderBase]: 8663/12981 cut-off events. [2024-06-20 16:19:38,614 INFO L125 PetriNetUnfolderBase]: For 376556/376724 co-relation queries the response was YES. [2024-06-20 16:19:38,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78556 conditions, 12981 events. 8663/12981 cut-off events. For 376556/376724 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 80398 event pairs, 3214 based on Foata normal form. 1/12776 useless extension candidates. Maximal degree in co-relation 78500. Up to 11797 conditions per place. [2024-06-20 16:19:38,718 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 170 selfloop transitions, 10 changer transitions 0/201 dead transitions. [2024-06-20 16:19:38,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 201 transitions, 2174 flow [2024-06-20 16:19:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:19:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:19:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 16:19:38,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-20 16:19:38,719 INFO L175 Difference]: Start difference. First operand has 139 places, 186 transitions, 1732 flow. Second operand 5 states and 131 transitions. [2024-06-20 16:19:38,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 201 transitions, 2174 flow [2024-06-20 16:19:38,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2092 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:19:38,990 INFO L231 Difference]: Finished difference. Result has 140 places, 190 transitions, 1739 flow [2024-06-20 16:19:38,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1739, PETRI_PLACES=140, PETRI_TRANSITIONS=190} [2024-06-20 16:19:38,991 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-20 16:19:38,991 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 190 transitions, 1739 flow [2024-06-20 16:19:38,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:38,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:38,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:38,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:19:38,991 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:38,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash 612341792, now seen corresponding path program 1 times [2024-06-20 16:19:38,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:38,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702753614] [2024-06-20 16:19:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:38,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:38,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:39,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:39,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702753614] [2024-06-20 16:19:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702753614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:39,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772760117] [2024-06-20 16:19:39,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:39,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:39,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:39,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 190 transitions, 1739 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:39,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:39,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:39,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:42,042 INFO L124 PetriNetUnfolderBase]: 10351/14851 cut-off events. [2024-06-20 16:19:42,042 INFO L125 PetriNetUnfolderBase]: For 475039/475048 co-relation queries the response was YES. [2024-06-20 16:19:42,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93186 conditions, 14851 events. 10351/14851 cut-off events. For 475039/475048 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85955 event pairs, 3965 based on Foata normal form. 12/14855 useless extension candidates. Maximal degree in co-relation 93129. Up to 13523 conditions per place. [2024-06-20 16:19:42,170 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 159 selfloop transitions, 75 changer transitions 0/242 dead transitions. [2024-06-20 16:19:42,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2711 flow [2024-06-20 16:19:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:42,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-20 16:19:42,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 16:19:42,171 INFO L175 Difference]: Start difference. First operand has 140 places, 190 transitions, 1739 flow. Second operand 7 states and 196 transitions. [2024-06-20 16:19:42,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2711 flow [2024-06-20 16:19:42,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 2650 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 16:19:42,468 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2044 flow [2024-06-20 16:19:42,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2044, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-20 16:19:42,468 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-20 16:19:42,468 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2044 flow [2024-06-20 16:19:42,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:42,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:19:42,469 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:42,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 618055712, now seen corresponding path program 2 times [2024-06-20 16:19:42,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:42,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447633561] [2024-06-20 16:19:42,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:42,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:42,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447633561] [2024-06-20 16:19:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447633561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:43,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:43,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106492825] [2024-06-20 16:19:43,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:43,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:43,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:43,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:43,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2044 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:43,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:43,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:43,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:45,527 INFO L124 PetriNetUnfolderBase]: 10323/14820 cut-off events. [2024-06-20 16:19:45,527 INFO L125 PetriNetUnfolderBase]: For 498904/498913 co-relation queries the response was YES. [2024-06-20 16:19:45,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94613 conditions, 14820 events. 10323/14820 cut-off events. For 498904/498913 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85780 event pairs, 3933 based on Foata normal form. 12/14824 useless extension candidates. Maximal degree in co-relation 94554. Up to 13503 conditions per place. [2024-06-20 16:19:45,667 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 160 selfloop transitions, 71 changer transitions 0/239 dead transitions. [2024-06-20 16:19:45,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 239 transitions, 2830 flow [2024-06-20 16:19:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 16:19:45,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2024-06-20 16:19:45,668 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2044 flow. Second operand 7 states and 193 transitions. [2024-06-20 16:19:45,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 239 transitions, 2830 flow [2024-06-20 16:19:46,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 239 transitions, 2699 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:19:46,072 INFO L231 Difference]: Finished difference. Result has 148 places, 203 transitions, 2067 flow [2024-06-20 16:19:46,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2067, PETRI_PLACES=148, PETRI_TRANSITIONS=203} [2024-06-20 16:19:46,072 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-20 16:19:46,072 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 203 transitions, 2067 flow [2024-06-20 16:19:46,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:19:46,073 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)] === [2024-06-20 16:19:46,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1379278086, now seen corresponding path program 3 times [2024-06-20 16:19:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:46,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888612687] [2024-06-20 16:19:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888612687] [2024-06-20 16:19:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888612687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100842921] [2024-06-20 16:19:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:46,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:47,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:47,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 203 transitions, 2067 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:47,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:47,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:47,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:49,102 INFO L124 PetriNetUnfolderBase]: 10299/14761 cut-off events. [2024-06-20 16:19:49,102 INFO L125 PetriNetUnfolderBase]: For 524728/524731 co-relation queries the response was YES. [2024-06-20 16:19:49,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95114 conditions, 14761 events. 10299/14761 cut-off events. For 524728/524731 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85351 event pairs, 3964 based on Foata normal form. 4/14746 useless extension candidates. Maximal degree in co-relation 95055. Up to 13483 conditions per place. [2024-06-20 16:19:49,240 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 153 selfloop transitions, 78 changer transitions 0/239 dead transitions. [2024-06-20 16:19:49,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 2861 flow [2024-06-20 16:19:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-20 16:19:49,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202156334231806 [2024-06-20 16:19:49,241 INFO L175 Difference]: Start difference. First operand has 148 places, 203 transitions, 2067 flow. Second operand 7 states and 193 transitions. [2024-06-20 16:19:49,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 2861 flow [2024-06-20 16:19:49,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 239 transitions, 2704 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 16:19:49,662 INFO L231 Difference]: Finished difference. Result has 151 places, 203 transitions, 2075 flow [2024-06-20 16:19:49,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=151, PETRI_TRANSITIONS=203} [2024-06-20 16:19:49,663 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-20 16:19:49,663 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 203 transitions, 2075 flow [2024-06-20 16:19:49,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:49,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:49,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:49,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:19:49,663 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)] === [2024-06-20 16:19:49,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:49,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1819879456, now seen corresponding path program 4 times [2024-06-20 16:19:49,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:49,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894382448] [2024-06-20 16:19:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:49,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:50,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894382448] [2024-06-20 16:19:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894382448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:50,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501676995] [2024-06-20 16:19:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:50,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:50,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 203 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:50,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:50,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:52,740 INFO L124 PetriNetUnfolderBase]: 10331/14803 cut-off events. [2024-06-20 16:19:52,740 INFO L125 PetriNetUnfolderBase]: For 552607/552616 co-relation queries the response was YES. [2024-06-20 16:19:52,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96326 conditions, 14803 events. 10331/14803 cut-off events. For 552607/552616 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85430 event pairs, 3964 based on Foata normal form. 8/14792 useless extension candidates. Maximal degree in co-relation 96266. Up to 13502 conditions per place. [2024-06-20 16:19:52,891 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 82 changer transitions 0/238 dead transitions. [2024-06-20 16:19:52,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 2814 flow [2024-06-20 16:19:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 16:19:52,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-20 16:19:52,892 INFO L175 Difference]: Start difference. First operand has 151 places, 203 transitions, 2075 flow. Second operand 7 states and 189 transitions. [2024-06-20 16:19:52,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 2814 flow [2024-06-20 16:19:53,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 238 transitions, 2473 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 16:19:53,312 INFO L231 Difference]: Finished difference. Result has 149 places, 207 transitions, 1980 flow [2024-06-20 16:19:53,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1980, PETRI_PLACES=149, PETRI_TRANSITIONS=207} [2024-06-20 16:19:53,312 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-20 16:19:53,312 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 207 transitions, 1980 flow [2024-06-20 16:19:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:53,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:53,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:53,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:19:53,313 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)] === [2024-06-20 16:19:53,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:53,313 INFO L85 PathProgramCache]: Analyzing trace with hash -534275518, now seen corresponding path program 5 times [2024-06-20 16:19:53,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:53,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324991644] [2024-06-20 16:19:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:53,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:54,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:54,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324991644] [2024-06-20 16:19:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324991644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:54,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:54,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771389353] [2024-06-20 16:19:54,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:54,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:54,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:54,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 207 transitions, 1980 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:54,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:54,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:54,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:19:56,283 INFO L124 PetriNetUnfolderBase]: 10317/14803 cut-off events. [2024-06-20 16:19:56,283 INFO L125 PetriNetUnfolderBase]: For 576533/576548 co-relation queries the response was YES. [2024-06-20 16:19:56,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96551 conditions, 14803 events. 10317/14803 cut-off events. For 576533/576548 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85725 event pairs, 3935 based on Foata normal form. 14/14799 useless extension candidates. Maximal degree in co-relation 96491. Up to 13494 conditions per place. [2024-06-20 16:19:56,430 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 77 changer transitions 0/234 dead transitions. [2024-06-20 16:19:56,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 234 transitions, 2630 flow [2024-06-20 16:19:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:19:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:19:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 16:19:56,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-20 16:19:56,431 INFO L175 Difference]: Start difference. First operand has 149 places, 207 transitions, 1980 flow. Second operand 7 states and 184 transitions. [2024-06-20 16:19:56,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 234 transitions, 2630 flow [2024-06-20 16:19:56,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 234 transitions, 2462 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-20 16:19:56,923 INFO L231 Difference]: Finished difference. Result has 152 places, 207 transitions, 1975 flow [2024-06-20 16:19:56,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1975, PETRI_PLACES=152, PETRI_TRANSITIONS=207} [2024-06-20 16:19:56,924 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-20 16:19:56,924 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 207 transitions, 1975 flow [2024-06-20 16:19:56,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:56,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:19:56,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:19:56,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:19:56,924 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:19:56,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:19:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1284691936, now seen corresponding path program 6 times [2024-06-20 16:19:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:19:56,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792978394] [2024-06-20 16:19:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:19:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:19:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:19:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:19:57,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:19:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792978394] [2024-06-20 16:19:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792978394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:19:57,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:19:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:19:57,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621447617] [2024-06-20 16:19:57,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:19:57,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:19:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:19:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:19:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:19:57,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:19:57,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 207 transitions, 1975 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:19:57,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:19:57,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:19:57,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:00,125 INFO L124 PetriNetUnfolderBase]: 10279/14749 cut-off events. [2024-06-20 16:20:00,125 INFO L125 PetriNetUnfolderBase]: For 604024/604045 co-relation queries the response was YES. [2024-06-20 16:20:00,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96850 conditions, 14749 events. 10279/14749 cut-off events. For 604024/604045 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85309 event pairs, 3935 based on Foata normal form. 22/14753 useless extension candidates. Maximal degree in co-relation 96789. Up to 13462 conditions per place. [2024-06-20 16:20:00,244 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 151 selfloop transitions, 73 changer transitions 0/232 dead transitions. [2024-06-20 16:20:00,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 232 transitions, 2491 flow [2024-06-20 16:20:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:20:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:20:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 16:20:00,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-20 16:20:00,245 INFO L175 Difference]: Start difference. First operand has 152 places, 207 transitions, 1975 flow. Second operand 7 states and 183 transitions. [2024-06-20 16:20:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 232 transitions, 2491 flow [2024-06-20 16:20:00,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 232 transitions, 2300 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:00,642 INFO L231 Difference]: Finished difference. Result has 154 places, 207 transitions, 1941 flow [2024-06-20 16:20:00,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1941, PETRI_PLACES=154, PETRI_TRANSITIONS=207} [2024-06-20 16:20:00,643 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-20 16:20:00,643 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 207 transitions, 1941 flow [2024-06-20 16:20:00,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:00,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:00,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:20:00,643 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:00,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1428018121, now seen corresponding path program 1 times [2024-06-20 16:20:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898169687] [2024-06-20 16:20:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:01,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:01,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898169687] [2024-06-20 16:20:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898169687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:01,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:01,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768830751] [2024-06-20 16:20:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:01,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:01,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:01,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:20:01,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 207 transitions, 1941 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:01,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:01,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:20:01,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:03,551 INFO L124 PetriNetUnfolderBase]: 9777/14291 cut-off events. [2024-06-20 16:20:03,551 INFO L125 PetriNetUnfolderBase]: For 619114/619274 co-relation queries the response was YES. [2024-06-20 16:20:03,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95778 conditions, 14291 events. 9777/14291 cut-off events. For 619114/619274 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 85568 event pairs, 3692 based on Foata normal form. 1/14161 useless extension candidates. Maximal degree in co-relation 95716. Up to 13255 conditions per place. [2024-06-20 16:20:03,718 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 185 selfloop transitions, 14 changer transitions 0/223 dead transitions. [2024-06-20 16:20:03,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 223 transitions, 2429 flow [2024-06-20 16:20:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:03,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 16:20:03,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-20 16:20:03,719 INFO L175 Difference]: Start difference. First operand has 154 places, 207 transitions, 1941 flow. Second operand 6 states and 147 transitions. [2024-06-20 16:20:03,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 223 transitions, 2429 flow [2024-06-20 16:20:04,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 223 transitions, 2248 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:20:04,220 INFO L231 Difference]: Finished difference. Result has 153 places, 211 transitions, 1863 flow [2024-06-20 16:20:04,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1863, PETRI_PLACES=153, PETRI_TRANSITIONS=211} [2024-06-20 16:20:04,221 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-20 16:20:04,221 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 211 transitions, 1863 flow [2024-06-20 16:20:04,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:04,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:04,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:04,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:20:04,221 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:04,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:04,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1684278240, now seen corresponding path program 1 times [2024-06-20 16:20:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:04,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433905520] [2024-06-20 16:20:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:05,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433905520] [2024-06-20 16:20:05,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433905520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:05,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:05,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:05,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008078145] [2024-06-20 16:20:05,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:05,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:05,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:05,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:05,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:05,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 211 transitions, 1863 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:05,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:05,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:05,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:07,687 INFO L124 PetriNetUnfolderBase]: 11105/15860 cut-off events. [2024-06-20 16:20:07,687 INFO L125 PetriNetUnfolderBase]: For 798278/798287 co-relation queries the response was YES. [2024-06-20 16:20:07,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112051 conditions, 15860 events. 11105/15860 cut-off events. For 798278/798287 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 91902 event pairs, 3353 based on Foata normal form. 36/15888 useless extension candidates. Maximal degree in co-relation 111988. Up to 13832 conditions per place. [2024-06-20 16:20:07,837 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 175 selfloop transitions, 90 changer transitions 0/274 dead transitions. [2024-06-20 16:20:07,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 274 transitions, 2839 flow [2024-06-20 16:20:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-20 16:20:07,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-20 16:20:07,838 INFO L175 Difference]: Start difference. First operand has 153 places, 211 transitions, 1863 flow. Second operand 8 states and 228 transitions. [2024-06-20 16:20:07,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 274 transitions, 2839 flow [2024-06-20 16:20:08,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 274 transitions, 2764 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:08,269 INFO L231 Difference]: Finished difference. Result has 158 places, 219 transitions, 2137 flow [2024-06-20 16:20:08,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2137, PETRI_PLACES=158, PETRI_TRANSITIONS=219} [2024-06-20 16:20:08,270 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-20 16:20:08,270 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 219 transitions, 2137 flow [2024-06-20 16:20:08,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:08,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:08,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:08,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:20:08,270 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:08,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1692849120, now seen corresponding path program 2 times [2024-06-20 16:20:08,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:08,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739652840] [2024-06-20 16:20:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:08,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:09,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739652840] [2024-06-20 16:20:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739652840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:09,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:09,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:09,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666405381] [2024-06-20 16:20:09,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:09,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:09,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:09,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:09,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:09,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 219 transitions, 2137 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:09,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:09,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:09,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:12,017 INFO L124 PetriNetUnfolderBase]: 11383/16234 cut-off events. [2024-06-20 16:20:12,017 INFO L125 PetriNetUnfolderBase]: For 861375/861384 co-relation queries the response was YES. [2024-06-20 16:20:12,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118576 conditions, 16234 events. 11383/16234 cut-off events. For 861375/861384 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 94094 event pairs, 4071 based on Foata normal form. 44/16266 useless extension candidates. Maximal degree in co-relation 118511. Up to 14626 conditions per place. [2024-06-20 16:20:12,194 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 175 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-20 16:20:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 269 transitions, 2868 flow [2024-06-20 16:20:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-20 16:20:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-20 16:20:12,195 INFO L175 Difference]: Start difference. First operand has 158 places, 219 transitions, 2137 flow. Second operand 8 states and 221 transitions. [2024-06-20 16:20:12,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 269 transitions, 2868 flow [2024-06-20 16:20:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 269 transitions, 2729 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:12,863 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 2252 flow [2024-06-20 16:20:12,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2252, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-20 16:20:12,863 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-20 16:20:12,863 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 2252 flow [2024-06-20 16:20:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:20:12,864 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:12,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1979736450, now seen corresponding path program 3 times [2024-06-20 16:20:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:12,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941498000] [2024-06-20 16:20:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:13,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941498000] [2024-06-20 16:20:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941498000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:13,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:13,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:13,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262286777] [2024-06-20 16:20:13,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:13,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:13,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:14,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:14,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 2252 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:14,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:14,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:14,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:16,716 INFO L124 PetriNetUnfolderBase]: 11633/16579 cut-off events. [2024-06-20 16:20:16,716 INFO L125 PetriNetUnfolderBase]: For 909593/909602 co-relation queries the response was YES. [2024-06-20 16:20:16,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122593 conditions, 16579 events. 11633/16579 cut-off events. For 909593/909602 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 96304 event pairs, 4103 based on Foata normal form. 44/16611 useless extension candidates. Maximal degree in co-relation 122526. Up to 14976 conditions per place. [2024-06-20 16:20:16,891 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 179 selfloop transitions, 78 changer transitions 0/266 dead transitions. [2024-06-20 16:20:16,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 266 transitions, 2967 flow [2024-06-20 16:20:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:16,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 16:20:16,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-20 16:20:16,892 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 2252 flow. Second operand 8 states and 215 transitions. [2024-06-20 16:20:16,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 266 transitions, 2967 flow [2024-06-20 16:20:17,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 266 transitions, 2772 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:17,467 INFO L231 Difference]: Finished difference. Result has 164 places, 225 transitions, 2303 flow [2024-06-20 16:20:17,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2303, PETRI_PLACES=164, PETRI_TRANSITIONS=225} [2024-06-20 16:20:17,467 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-20 16:20:17,467 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 225 transitions, 2303 flow [2024-06-20 16:20:17,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:17,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:17,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:17,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:20:17,468 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:17,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1177334304, now seen corresponding path program 1 times [2024-06-20 16:20:17,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:17,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292600283] [2024-06-20 16:20:17,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:17,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:18,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:18,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292600283] [2024-06-20 16:20:18,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292600283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:18,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:18,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:18,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256239125] [2024-06-20 16:20:18,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:18,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:18,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:18,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:18,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 225 transitions, 2303 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:18,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:18,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:21,668 INFO L124 PetriNetUnfolderBase]: 11697/16688 cut-off events. [2024-06-20 16:20:21,668 INFO L125 PetriNetUnfolderBase]: For 930453/930456 co-relation queries the response was YES. [2024-06-20 16:20:21,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123871 conditions, 16688 events. 11697/16688 cut-off events. For 930453/930456 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 97132 event pairs, 4236 based on Foata normal form. 8/16685 useless extension candidates. Maximal degree in co-relation 123803. Up to 15613 conditions per place. [2024-06-20 16:20:21,852 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 210 selfloop transitions, 50 changer transitions 0/269 dead transitions. [2024-06-20 16:20:21,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 269 transitions, 3005 flow [2024-06-20 16:20:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-20 16:20:21,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-20 16:20:21,854 INFO L175 Difference]: Start difference. First operand has 164 places, 225 transitions, 2303 flow. Second operand 8 states and 214 transitions. [2024-06-20 16:20:21,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 269 transitions, 3005 flow [2024-06-20 16:20:22,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 269 transitions, 2818 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:20:22,724 INFO L231 Difference]: Finished difference. Result has 166 places, 230 transitions, 2316 flow [2024-06-20 16:20:22,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2316, PETRI_PLACES=166, PETRI_TRANSITIONS=230} [2024-06-20 16:20:22,732 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-20 16:20:22,732 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 230 transitions, 2316 flow [2024-06-20 16:20:22,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:22,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:22,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:22,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:20:22,733 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:22,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1973430492, now seen corresponding path program 2 times [2024-06-20 16:20:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631896909] [2024-06-20 16:20:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:23,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:23,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631896909] [2024-06-20 16:20:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631896909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:23,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337007191] [2024-06-20 16:20:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:23,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 230 transitions, 2316 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:23,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:23,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:23,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:26,973 INFO L124 PetriNetUnfolderBase]: 11881/16950 cut-off events. [2024-06-20 16:20:26,973 INFO L125 PetriNetUnfolderBase]: For 981202/981208 co-relation queries the response was YES. [2024-06-20 16:20:27,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128714 conditions, 16950 events. 11881/16950 cut-off events. For 981202/981208 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 98973 event pairs, 4064 based on Foata normal form. 8/16940 useless extension candidates. Maximal degree in co-relation 128645. Up to 14999 conditions per place. [2024-06-20 16:20:27,148 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 167 selfloop transitions, 113 changer transitions 0/289 dead transitions. [2024-06-20 16:20:27,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3568 flow [2024-06-20 16:20:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-20 16:20:27,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 16:20:27,150 INFO L175 Difference]: Start difference. First operand has 166 places, 230 transitions, 2316 flow. Second operand 8 states and 224 transitions. [2024-06-20 16:20:27,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3568 flow [2024-06-20 16:20:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 289 transitions, 3368 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 16:20:27,791 INFO L231 Difference]: Finished difference. Result has 168 places, 244 transitions, 2643 flow [2024-06-20 16:20:27,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2116, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2643, PETRI_PLACES=168, PETRI_TRANSITIONS=244} [2024-06-20 16:20:27,792 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 112 predicate places. [2024-06-20 16:20:27,792 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 244 transitions, 2643 flow [2024-06-20 16:20:27,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:27,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:27,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:27,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:20:27,792 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:27,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:27,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1979859582, now seen corresponding path program 3 times [2024-06-20 16:20:27,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:27,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183659245] [2024-06-20 16:20:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183659245] [2024-06-20 16:20:28,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183659245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:28,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:28,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090824107] [2024-06-20 16:20:28,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:28,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:29,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:29,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 244 transitions, 2643 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:29,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:29,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:29,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:32,122 INFO L124 PetriNetUnfolderBase]: 12037/17189 cut-off events. [2024-06-20 16:20:32,123 INFO L125 PetriNetUnfolderBase]: For 1057275/1057281 co-relation queries the response was YES. [2024-06-20 16:20:32,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135656 conditions, 17189 events. 12037/17189 cut-off events. For 1057275/1057281 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 100462 event pairs, 4092 based on Foata normal form. 8/17179 useless extension candidates. Maximal degree in co-relation 135585. Up to 15115 conditions per place. [2024-06-20 16:20:32,302 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 169 selfloop transitions, 118 changer transitions 0/296 dead transitions. [2024-06-20 16:20:32,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 296 transitions, 3870 flow [2024-06-20 16:20:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-20 16:20:32,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-20 16:20:32,303 INFO L175 Difference]: Start difference. First operand has 168 places, 244 transitions, 2643 flow. Second operand 8 states and 220 transitions. [2024-06-20 16:20:32,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 296 transitions, 3870 flow [2024-06-20 16:20:33,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 296 transitions, 3693 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-20 16:20:33,092 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 2897 flow [2024-06-20 16:20:33,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-20 16:20:33,093 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-06-20 16:20:33,093 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 2897 flow [2024-06-20 16:20:33,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:33,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:33,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:33,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:20:33,093 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:33,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:33,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1980105846, now seen corresponding path program 1 times [2024-06-20 16:20:33,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:33,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547372255] [2024-06-20 16:20:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:33,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:34,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:34,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547372255] [2024-06-20 16:20:34,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547372255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:34,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:34,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872300958] [2024-06-20 16:20:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:34,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:34,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:34,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 2897 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:34,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:34,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:34,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:37,641 INFO L124 PetriNetUnfolderBase]: 12064/17216 cut-off events. [2024-06-20 16:20:37,641 INFO L125 PetriNetUnfolderBase]: For 1098317/1098320 co-relation queries the response was YES. [2024-06-20 16:20:37,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137426 conditions, 17216 events. 12064/17216 cut-off events. For 1098317/1098320 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 100511 event pairs, 4215 based on Foata normal form. 4/17207 useless extension candidates. Maximal degree in co-relation 137353. Up to 16278 conditions per place. [2024-06-20 16:20:37,852 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 254 selfloop transitions, 31 changer transitions 0/294 dead transitions. [2024-06-20 16:20:37,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3679 flow [2024-06-20 16:20:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 16:20:37,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-20 16:20:37,853 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 2897 flow. Second operand 8 states and 203 transitions. [2024-06-20 16:20:37,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3679 flow [2024-06-20 16:20:38,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 294 transitions, 3472 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:38,920 INFO L231 Difference]: Finished difference. Result has 178 places, 260 transitions, 2897 flow [2024-06-20 16:20:38,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=178, PETRI_TRANSITIONS=260} [2024-06-20 16:20:38,920 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-20 16:20:38,920 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 260 transitions, 2897 flow [2024-06-20 16:20:38,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:38,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:38,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:38,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:20:38,921 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:38,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash 915320216, now seen corresponding path program 1 times [2024-06-20 16:20:38,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:38,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663943782] [2024-06-20 16:20:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:38,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:39,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:39,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663943782] [2024-06-20 16:20:39,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663943782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:39,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:39,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:20:39,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485582607] [2024-06-20 16:20:39,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:39,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:20:39,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:20:39,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:20:39,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:20:39,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 260 transitions, 2897 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:39,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:39,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:20:39,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:42,560 INFO L124 PetriNetUnfolderBase]: 11483/16596 cut-off events. [2024-06-20 16:20:42,561 INFO L125 PetriNetUnfolderBase]: For 1137596/1137808 co-relation queries the response was YES. [2024-06-20 16:20:42,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137052 conditions, 16596 events. 11483/16596 cut-off events. For 1137596/1137808 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 100077 event pairs, 4007 based on Foata normal form. 1/16409 useless extension candidates. Maximal degree in co-relation 136977. Up to 15357 conditions per place. [2024-06-20 16:20:42,749 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 242 selfloop transitions, 14 changer transitions 0/285 dead transitions. [2024-06-20 16:20:42,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 285 transitions, 3541 flow [2024-06-20 16:20:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:20:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:20:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 16:20:42,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-20 16:20:42,750 INFO L175 Difference]: Start difference. First operand has 178 places, 260 transitions, 2897 flow. Second operand 6 states and 156 transitions. [2024-06-20 16:20:42,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 285 transitions, 3541 flow [2024-06-20 16:20:43,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 285 transitions, 3403 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-20 16:20:43,779 INFO L231 Difference]: Finished difference. Result has 179 places, 264 transitions, 2880 flow [2024-06-20 16:20:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2880, PETRI_PLACES=179, PETRI_TRANSITIONS=264} [2024-06-20 16:20:43,780 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-20 16:20:43,780 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 264 transitions, 2880 flow [2024-06-20 16:20:43,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:43,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:43,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:43,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:20:43,780 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:43,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:43,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1170865790, now seen corresponding path program 4 times [2024-06-20 16:20:43,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:43,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932828928] [2024-06-20 16:20:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:44,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:44,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932828928] [2024-06-20 16:20:44,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932828928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:44,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:44,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48437911] [2024-06-20 16:20:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:44,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:45,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:45,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 264 transitions, 2880 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:45,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:45,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:45,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:20:48,128 INFO L124 PetriNetUnfolderBase]: 12048/17175 cut-off events. [2024-06-20 16:20:48,128 INFO L125 PetriNetUnfolderBase]: For 1192937/1192952 co-relation queries the response was YES. [2024-06-20 16:20:48,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140199 conditions, 17175 events. 12048/17175 cut-off events. For 1192937/1192952 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 100043 event pairs, 4115 based on Foata normal form. 50/17199 useless extension candidates. Maximal degree in co-relation 140123. Up to 15487 conditions per place. [2024-06-20 16:20:48,308 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 211 selfloop transitions, 79 changer transitions 0/299 dead transitions. [2024-06-20 16:20:48,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 299 transitions, 3595 flow [2024-06-20 16:20:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:20:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:20:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-20 16:20:48,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-20 16:20:48,309 INFO L175 Difference]: Start difference. First operand has 179 places, 264 transitions, 2880 flow. Second operand 8 states and 209 transitions. [2024-06-20 16:20:48,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 299 transitions, 3595 flow [2024-06-20 16:20:49,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 299 transitions, 3478 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 16:20:49,151 INFO L231 Difference]: Finished difference. Result has 183 places, 265 transitions, 2945 flow [2024-06-20 16:20:49,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2945, PETRI_PLACES=183, PETRI_TRANSITIONS=265} [2024-06-20 16:20:49,151 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-06-20 16:20:49,151 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 265 transitions, 2945 flow [2024-06-20 16:20:49,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:49,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:20:49,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:20:49,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:20:49,152 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:20:49,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:20:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash -303000134, now seen corresponding path program 4 times [2024-06-20 16:20:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:20:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540525703] [2024-06-20 16:20:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:20:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:20:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:20:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:20:50,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:20:50,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540525703] [2024-06-20 16:20:50,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540525703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:20:50,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:20:50,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:20:50,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146874606] [2024-06-20 16:20:50,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:20:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:20:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:20:50,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:20:50,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:20:50,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:20:50,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 265 transitions, 2945 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:20:50,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:20:50,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:20:50,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand