./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix004.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/mix004.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/mix004.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix004.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 15:42:51,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:42:51,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:42:51,326 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:42:51,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:42:51,356 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:42:51,357 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:42:51,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:42:51,358 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:42:51,361 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:42:51,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:42:51,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:42:51,362 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:42:51,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:42:51,363 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:42:51,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:42:51,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:42:51,364 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:42:51,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:42:51,364 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:42:51,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:42:51,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:42:51,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:42:51,366 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:42:51,366 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:42:51,366 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:42:51,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:42:51,367 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:42:51,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:42:51,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:42:51,368 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:42:51,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:42:51,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:42:51,369 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:42:51,369 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:42:51,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:42:51,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:42:51,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:42:51,370 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:42:51,374 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:42:51,374 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:42:51,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:42:51,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:42:51,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:42:51,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:42:51,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:42:51,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:42:51,610 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:42:51,610 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:42:51,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-20 15:42:52,766 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:42:52,970 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:42:52,971 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-20 15:42:52,983 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da4d220/af098b6bf74a47138bad3c7258e44d2c/FLAGfe0bc87ba [2024-06-20 15:42:52,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7da4d220/af098b6bf74a47138bad3c7258e44d2c [2024-06-20 15:42:52,995 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:42:52,996 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:42:52,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix004.opt.yml/witness.yml [2024-06-20 15:42:53,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:42:53,172 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:42:53,173 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:42:53,173 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:42:53,177 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:42:53,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:42:52" (1/2) ... [2024-06-20 15:42:53,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:42:53, skipping insertion in model container [2024-06-20 15:42:53,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:42:52" (1/2) ... [2024-06-20 15:42:53,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b41eff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:42:53, skipping insertion in model container [2024-06-20 15:42:53,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:42:53" (2/2) ... [2024-06-20 15:42:53,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632daef and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:42:53, skipping insertion in model container [2024-06-20 15:42:53,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:42:53" (2/2) ... [2024-06-20 15:42:53,180 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:42:53,332 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:42:53,334 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-20 15:42:53,334 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-20 15:42:53,334 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-20 15:42:53,334 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-20 15:42:53,334 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:42:53,335 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-20 15:42:53,373 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:42:53,670 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:42:53,678 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 15:42:53,796 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:42:53,830 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:42:53,831 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:42:53 WrapperNode [2024-06-20 15:42:53,831 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:42:53,832 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:42:53,832 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:42:53,832 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:42:53,838 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,864 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,905 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-20 15:42:53,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:42:53,908 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:42:53,908 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:42:53,909 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:42:53,917 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,918 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,930 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,958 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 15:42:53,958 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,958 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,969 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,978 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 03:42:53" (1/1) ... [2024-06-20 15:42:53,980 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 03:42:53" (1/1) ... [2024-06-20 15:42:54,001 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 03:42:53" (1/1) ... [2024-06-20 15:42:54,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:42:54,007 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:42:54,008 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:42:54,008 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:42:54,009 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 03:42:53" (1/1) ... [2024-06-20 15:42:54,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:42:54,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:42:54,030 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 15:42:54,031 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 15:42:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:42:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:42:54,057 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:42:54,057 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:42:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:42:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:42:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:42:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:42:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 15:42:54,058 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 15:42:54,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:42:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:42:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:42:54,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:42:54,060 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 15:42:54,169 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:42:54,171 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:42:54,528 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:42:54,529 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:42:54,680 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:42:54,680 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:42:54,681 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:42:54 BoogieIcfgContainer [2024-06-20 15:42:54,681 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:42:54,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:42:54,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:42:54,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:42:54,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:42:52" (1/4) ... [2024-06-20 15:42:54,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5263233d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:42:54, skipping insertion in model container [2024-06-20 15:42:54,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:42:53" (2/4) ... [2024-06-20 15:42:54,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5263233d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:42:54, skipping insertion in model container [2024-06-20 15:42:54,687 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 03:42:53" (3/4) ... [2024-06-20 15:42:54,687 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5263233d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:42:54, skipping insertion in model container [2024-06-20 15:42:54,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:42:54" (4/4) ... [2024-06-20 15:42:54,688 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.opt.i [2024-06-20 15:42:54,701 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:42:54,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 15:42:54,701 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:42:54,748 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:42:54,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 15:42:54,806 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-20 15:42:54,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:42:54,808 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 93 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 15:42:54,808 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 15:42:54,811 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-20 15:42:54,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:42:54,827 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;@52207eee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:42:54,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 15:42:54,833 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:42:54,833 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:42:54,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:42:54,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:54,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:42:54,834 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 15:42:54,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 417595377, now seen corresponding path program 1 times [2024-06-20 15:42:54,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:54,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972638784] [2024-06-20 15:42:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:42:56,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:56,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972638784] [2024-06-20 15:42:56,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972638784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:56,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:56,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:42:56,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695689317] [2024-06-20 15:42:56,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:56,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:42:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:42:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:42:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-06-20 15:42:56,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 15:42:56,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:56,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-06-20 15:42:56,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:57,028 INFO L124 PetriNetUnfolderBase]: 4867/7027 cut-off events. [2024-06-20 15:42:57,028 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-20 15:42:57,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13939 conditions, 7027 events. 4867/7027 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40787 event pairs, 3534 based on Foata normal form. 1/6810 useless extension candidates. Maximal degree in co-relation 13926. Up to 6693 conditions per place. [2024-06-20 15:42:57,071 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 40 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-20 15:42:57,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 225 flow [2024-06-20 15:42:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:42:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:42:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-20 15:42:57,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:42:57,082 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 106 transitions. [2024-06-20 15:42:57,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 225 flow [2024-06-20 15:42:57,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:42:57,090 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-20 15:42:57,091 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 15:42:57,094 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-20 15:42:57,094 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-20 15:42:57,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 15:42:57,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:57,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:57,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:42:57,095 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 15:42:57,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:57,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1877255952, now seen corresponding path program 1 times [2024-06-20 15:42:57,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:57,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902258114] [2024-06-20 15:42:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:57,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:57,781 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 15:42:57,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:57,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902258114] [2024-06-20 15:42:57,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902258114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:57,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:57,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:42:57,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894774078] [2024-06-20 15:42:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:57,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:42:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:42:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:42:57,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-20 15:42:57,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 15:42:57,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:57,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-20 15:42:57,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:42:58,722 INFO L124 PetriNetUnfolderBase]: 5569/7857 cut-off events. [2024-06-20 15:42:58,722 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2024-06-20 15:42:58,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18044 conditions, 7857 events. 5569/7857 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44449 event pairs, 3437 based on Foata normal form. 4/7815 useless extension candidates. Maximal degree in co-relation 18032. Up to 7610 conditions per place. [2024-06-20 15:42:58,762 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 51 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 15:42:58,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 319 flow [2024-06-20 15:42:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:42:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:42:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-20 15:42:58,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-20 15:42:58,764 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 136 transitions. [2024-06-20 15:42:58,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 319 flow [2024-06-20 15:42:58,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:42:58,766 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-20 15:42:58,766 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 15:42:58,767 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-20 15:42:58,767 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-20 15:42:58,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 15:42:58,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:42:58,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:42:58,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:42:58,768 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 15:42:58,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:42:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash 564740903, now seen corresponding path program 1 times [2024-06-20 15:42:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:42:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773257055] [2024-06-20 15:42:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:42:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:42:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:42:59,700 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 15:42:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:42:59,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773257055] [2024-06-20 15:42:59,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773257055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:42:59,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:42:59,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:42:59,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324524800] [2024-06-20 15:42:59,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:42:59,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:42:59,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:42:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:42:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:42:59,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-20 15:42:59,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 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 15:42:59,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:42:59,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-20 15:42:59,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:01,009 INFO L124 PetriNetUnfolderBase]: 7070/9909 cut-off events. [2024-06-20 15:43:01,010 INFO L125 PetriNetUnfolderBase]: For 6002/6002 co-relation queries the response was YES. [2024-06-20 15:43:01,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25343 conditions, 9909 events. 7070/9909 cut-off events. For 6002/6002 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56128 event pairs, 3323 based on Foata normal form. 8/9858 useless extension candidates. Maximal degree in co-relation 25329. Up to 9556 conditions per place. [2024-06-20 15:43:01,054 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-20 15:43:01,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 484 flow [2024-06-20 15:43:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-20 15:43:01,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60062893081761 [2024-06-20 15:43:01,060 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 191 transitions. [2024-06-20 15:43:01,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 484 flow [2024-06-20 15:43:01,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 15:43:01,064 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-20 15:43:01,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-20 15:43:01,065 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-20 15:43:01,066 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-20 15:43:01,066 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 15:43:01,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:01,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:01,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:43:01,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:01,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:01,067 INFO L85 PathProgramCache]: Analyzing trace with hash -671642190, now seen corresponding path program 1 times [2024-06-20 15:43:01,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:01,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122672299] [2024-06-20 15:43:01,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:01,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:01,865 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 15:43:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122672299] [2024-06-20 15:43:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122672299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:01,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:01,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:43:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271037410] [2024-06-20 15:43:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:43:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:01,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:43:01,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:43:01,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-20 15:43:01,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 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 15:43:01,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:01,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-20 15:43:01,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:03,025 INFO L124 PetriNetUnfolderBase]: 6156/8926 cut-off events. [2024-06-20 15:43:03,026 INFO L125 PetriNetUnfolderBase]: For 9719/9719 co-relation queries the response was YES. [2024-06-20 15:43:03,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24968 conditions, 8926 events. 6156/8926 cut-off events. For 9719/9719 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 52173 event pairs, 3157 based on Foata normal form. 3/8827 useless extension candidates. Maximal degree in co-relation 24951. Up to 8408 conditions per place. [2024-06-20 15:43:03,064 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 58 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-20 15:43:03,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 445 flow [2024-06-20 15:43:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:43:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:43:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 15:43:03,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-20 15:43:03,066 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 140 transitions. [2024-06-20 15:43:03,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 445 flow [2024-06-20 15:43:03,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:03,072 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-20 15:43:03,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-20 15:43:03,073 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-20 15:43:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-20 15:43:03,074 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 15:43:03,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:03,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:03,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:43:03,074 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 15:43:03,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1081318993, now seen corresponding path program 1 times [2024-06-20 15:43:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:03,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153039136] [2024-06-20 15:43:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:03,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:04,023 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 15:43:04,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:04,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153039136] [2024-06-20 15:43:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153039136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:04,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:04,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:04,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259982947] [2024-06-20 15:43:04,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:04,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:04,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:04,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 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 15:43:04,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:04,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:04,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:05,703 INFO L124 PetriNetUnfolderBase]: 7083/9987 cut-off events. [2024-06-20 15:43:05,704 INFO L125 PetriNetUnfolderBase]: For 17651/17673 co-relation queries the response was YES. [2024-06-20 15:43:05,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30795 conditions, 9987 events. 7083/9987 cut-off events. For 17651/17673 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 56697 event pairs, 3545 based on Foata normal form. 5/9968 useless extension candidates. Maximal degree in co-relation 30776. Up to 9589 conditions per place. [2024-06-20 15:43:05,747 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 15:43:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 602 flow [2024-06-20 15:43:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-20 15:43:05,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2024-06-20 15:43:05,750 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 170 transitions. [2024-06-20 15:43:05,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 602 flow [2024-06-20 15:43:05,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 573 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:05,756 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-20 15:43:05,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-20 15:43:05,760 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-20 15:43:05,760 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-20 15:43:05,761 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 15:43:05,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:05,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:05,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:43:05,761 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 15:43:05,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:05,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1107329233, now seen corresponding path program 2 times [2024-06-20 15:43:05,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:05,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426397841] [2024-06-20 15:43:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:06,673 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 15:43:06,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426397841] [2024-06-20 15:43:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426397841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:06,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:06,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:06,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284660629] [2024-06-20 15:43:06,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:06,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:06,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:06,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:06,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:06,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:06,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 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 15:43:06,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:06,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:06,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:07,980 INFO L124 PetriNetUnfolderBase]: 7074/9990 cut-off events. [2024-06-20 15:43:07,981 INFO L125 PetriNetUnfolderBase]: For 25783/25826 co-relation queries the response was YES. [2024-06-20 15:43:08,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33469 conditions, 9990 events. 7074/9990 cut-off events. For 25783/25826 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 56906 event pairs, 3548 based on Foata normal form. 25/9992 useless extension candidates. Maximal degree in co-relation 33449. Up to 9580 conditions per place. [2024-06-20 15:43:08,040 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 63 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-20 15:43:08,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 584 flow [2024-06-20 15:43:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 15:43:08,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-20 15:43:08,042 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 164 transitions. [2024-06-20 15:43:08,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 584 flow [2024-06-20 15:43:08,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 538 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 15:43:08,054 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-20 15:43:08,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-20 15:43:08,056 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-20 15:43:08,057 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-20 15:43:08,057 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 15:43:08,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:08,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:43:08,057 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 15:43:08,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -357307681, now seen corresponding path program 1 times [2024-06-20 15:43:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:08,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897744917] [2024-06-20 15:43:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:08,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:09,068 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 15:43:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897744917] [2024-06-20 15:43:09,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897744917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:09,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690859161] [2024-06-20 15:43:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:09,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:09,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 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 15:43:09,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:09,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:09,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:10,444 INFO L124 PetriNetUnfolderBase]: 7165/10144 cut-off events. [2024-06-20 15:43:10,445 INFO L125 PetriNetUnfolderBase]: For 29531/29569 co-relation queries the response was YES. [2024-06-20 15:43:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34359 conditions, 10144 events. 7165/10144 cut-off events. For 29531/29569 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 57834 event pairs, 3538 based on Foata normal form. 7/10131 useless extension candidates. Maximal degree in co-relation 34337. Up to 9682 conditions per place. [2024-06-20 15:43:10,503 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 87 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-20 15:43:10,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 820 flow [2024-06-20 15:43:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-20 15:43:10,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5212264150943396 [2024-06-20 15:43:10,505 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 221 transitions. [2024-06-20 15:43:10,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 820 flow [2024-06-20 15:43:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 128 transitions, 746 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:10,519 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-20 15:43:10,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-20 15:43:10,520 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-20 15:43:10,520 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-20 15:43:10,520 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 15:43:10,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:10,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:10,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:43:10,521 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 15:43:10,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -838852777, now seen corresponding path program 2 times [2024-06-20 15:43:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301990209] [2024-06-20 15:43:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:10,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:11,536 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 15:43:11,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:11,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301990209] [2024-06-20 15:43:11,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301990209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:11,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:11,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:11,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124089255] [2024-06-20 15:43:11,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:11,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:11,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:11,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:11,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 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 15:43:11,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:11,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:11,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:13,013 INFO L124 PetriNetUnfolderBase]: 7187/10160 cut-off events. [2024-06-20 15:43:13,014 INFO L125 PetriNetUnfolderBase]: For 40060/40124 co-relation queries the response was YES. [2024-06-20 15:43:13,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37368 conditions, 10160 events. 7187/10160 cut-off events. For 40060/40124 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57848 event pairs, 3446 based on Foata normal form. 11/10153 useless extension candidates. Maximal degree in co-relation 37344. Up to 9689 conditions per place. [2024-06-20 15:43:13,083 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 87 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-20 15:43:13,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 925 flow [2024-06-20 15:43:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-20 15:43:13,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522911051212938 [2024-06-20 15:43:13,085 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 194 transitions. [2024-06-20 15:43:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 925 flow [2024-06-20 15:43:13,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 867 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:13,105 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-20 15:43:13,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-20 15:43:13,107 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-20 15:43:13,107 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-20 15:43:13,107 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 15:43:13,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:13,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:13,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:43:13,108 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:13,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1184405505, now seen corresponding path program 3 times [2024-06-20 15:43:13,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:13,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590354615] [2024-06-20 15:43:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:13,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:14,012 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 15:43:14,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590354615] [2024-06-20 15:43:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590354615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:14,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:14,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:14,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197824215] [2024-06-20 15:43:14,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:14,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:14,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 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 15:43:14,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:14,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:14,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:15,528 INFO L124 PetriNetUnfolderBase]: 7209/10195 cut-off events. [2024-06-20 15:43:15,528 INFO L125 PetriNetUnfolderBase]: For 52609/52667 co-relation queries the response was YES. [2024-06-20 15:43:15,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40251 conditions, 10195 events. 7209/10195 cut-off events. For 52609/52667 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57975 event pairs, 3397 based on Foata normal form. 21/10194 useless extension candidates. Maximal degree in co-relation 40226. Up to 9633 conditions per place. [2024-06-20 15:43:15,582 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 77 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-20 15:43:15,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1102 flow [2024-06-20 15:43:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-20 15:43:15,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-20 15:43:15,584 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 198 transitions. [2024-06-20 15:43:15,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1102 flow [2024-06-20 15:43:15,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 983 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:15,605 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-20 15:43:15,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-20 15:43:15,606 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-20 15:43:15,606 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-20 15:43:15,606 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 15:43:15,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:15,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:15,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:43:15,607 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 15:43:15,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:15,607 INFO L85 PathProgramCache]: Analyzing trace with hash 443683359, now seen corresponding path program 4 times [2024-06-20 15:43:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857169996] [2024-06-20 15:43:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:16,583 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 15:43:16,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:16,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857169996] [2024-06-20 15:43:16,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857169996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:16,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:16,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:16,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483813594] [2024-06-20 15:43:16,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:16,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:16,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:16,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:16,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 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 15:43:16,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:16,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:16,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:18,235 INFO L124 PetriNetUnfolderBase]: 7200/10196 cut-off events. [2024-06-20 15:43:18,236 INFO L125 PetriNetUnfolderBase]: For 53390/53451 co-relation queries the response was YES. [2024-06-20 15:43:18,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40196 conditions, 10196 events. 7200/10196 cut-off events. For 53390/53451 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 57950 event pairs, 3404 based on Foata normal form. 19/10183 useless extension candidates. Maximal degree in co-relation 40170. Up to 9624 conditions per place. [2024-06-20 15:43:18,308 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 72 selfloop transitions, 50 changer transitions 0/131 dead transitions. [2024-06-20 15:43:18,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1038 flow [2024-06-20 15:43:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:18,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-20 15:43:18,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-20 15:43:18,310 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 192 transitions. [2024-06-20 15:43:18,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1038 flow [2024-06-20 15:43:18,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 955 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:18,340 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-20 15:43:18,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-20 15:43:18,341 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-20 15:43:18,342 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-20 15:43:18,342 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 15:43:18,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:18,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:18,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:43:18,342 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 15:43:18,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1361783289, now seen corresponding path program 1 times [2024-06-20 15:43:18,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:18,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909492272] [2024-06-20 15:43:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:19,510 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 15:43:19,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:19,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909492272] [2024-06-20 15:43:19,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909492272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:19,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:19,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:43:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655307066] [2024-06-20 15:43:19,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:19,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:43:19,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:43:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:43:19,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:19,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 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 15:43:19,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:19,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:19,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:21,253 INFO L124 PetriNetUnfolderBase]: 8032/11580 cut-off events. [2024-06-20 15:43:21,253 INFO L125 PetriNetUnfolderBase]: For 63107/63109 co-relation queries the response was YES. [2024-06-20 15:43:21,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45057 conditions, 11580 events. 8032/11580 cut-off events. For 63107/63109 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 66880 event pairs, 3728 based on Foata normal form. 6/11469 useless extension candidates. Maximal degree in co-relation 45029. Up to 10879 conditions per place. [2024-06-20 15:43:21,320 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 113 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-20 15:43:21,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1149 flow [2024-06-20 15:43:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:43:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:43:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 15:43:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-20 15:43:21,323 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 188 transitions. [2024-06-20 15:43:21,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1149 flow [2024-06-20 15:43:21,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1008 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:21,367 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-20 15:43:21,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-20 15:43:21,368 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-20 15:43:21,368 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-20 15:43:21,368 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 15:43:21,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:21,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:21,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:43:21,369 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 15:43:21,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 325714881, now seen corresponding path program 1 times [2024-06-20 15:43:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:21,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676922838] [2024-06-20 15:43:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:22,160 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 15:43:22,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676922838] [2024-06-20 15:43:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676922838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:22,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:22,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:43:22,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319386249] [2024-06-20 15:43:22,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:22,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:43:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:43:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:43:22,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:22,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 17.0) 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 15:43:22,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:22,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:22,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:23,668 INFO L124 PetriNetUnfolderBase]: 9059/12987 cut-off events. [2024-06-20 15:43:23,668 INFO L125 PetriNetUnfolderBase]: For 86452/86472 co-relation queries the response was YES. [2024-06-20 15:43:23,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53730 conditions, 12987 events. 9059/12987 cut-off events. For 86452/86472 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75599 event pairs, 4701 based on Foata normal form. 20/12839 useless extension candidates. Maximal degree in co-relation 53700. Up to 12368 conditions per place. [2024-06-20 15:43:23,762 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-20 15:43:23,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1009 flow [2024-06-20 15:43:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:43:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:43:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 15:43:23,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-06-20 15:43:23,764 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 132 transitions. [2024-06-20 15:43:23,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1009 flow [2024-06-20 15:43:23,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 15:43:23,804 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-20 15:43:23,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-20 15:43:23,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-20 15:43:23,805 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-20 15:43:23,805 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 15:43:23,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:23,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:23,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:43:23,805 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:23,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1507228129, now seen corresponding path program 1 times [2024-06-20 15:43:23,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:23,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376157301] [2024-06-20 15:43:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:23,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:24,722 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 15:43:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376157301] [2024-06-20 15:43:24,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376157301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:24,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:24,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:24,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755700973] [2024-06-20 15:43:24,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:24,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:24,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:24,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:24,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) 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 15:43:24,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:24,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:24,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:26,421 INFO L124 PetriNetUnfolderBase]: 9082/13210 cut-off events. [2024-06-20 15:43:26,421 INFO L125 PetriNetUnfolderBase]: For 101568/101588 co-relation queries the response was YES. [2024-06-20 15:43:26,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56956 conditions, 13210 events. 9082/13210 cut-off events. For 101568/101588 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 78443 event pairs, 4665 based on Foata normal form. 22/13201 useless extension candidates. Maximal degree in co-relation 56925. Up to 12332 conditions per place. [2024-06-20 15:43:26,525 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 107 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-06-20 15:43:26,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1060 flow [2024-06-20 15:43:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:43:26,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-20 15:43:26,528 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:43:26,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1060 flow [2024-06-20 15:43:26,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1017 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:26,589 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 762 flow [2024-06-20 15:43:26,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=762, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-20 15:43:26,589 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-20 15:43:26,589 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 762 flow [2024-06-20 15:43:26,590 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 15:43:26,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:26,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:26,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:43:26,590 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 15:43:26,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1202701150, now seen corresponding path program 1 times [2024-06-20 15:43:26,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:26,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237145464] [2024-06-20 15:43:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:26,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:27,631 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 15:43:27,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237145464] [2024-06-20 15:43:27,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237145464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:27,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978260317] [2024-06-20 15:43:27,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:27,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:27,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:27,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 762 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:27,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:27,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:27,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:29,904 INFO L124 PetriNetUnfolderBase]: 10479/14763 cut-off events. [2024-06-20 15:43:29,904 INFO L125 PetriNetUnfolderBase]: For 153506/153717 co-relation queries the response was YES. [2024-06-20 15:43:29,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71029 conditions, 14763 events. 10479/14763 cut-off events. For 153506/153717 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 86207 event pairs, 3699 based on Foata normal form. 47/14740 useless extension candidates. Maximal degree in co-relation 70997. Up to 13675 conditions per place. [2024-06-20 15:43:30,036 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 129 selfloop transitions, 41 changer transitions 0/181 dead transitions. [2024-06-20 15:43:30,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 181 transitions, 1464 flow [2024-06-20 15:43:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:43:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:43:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-20 15:43:30,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303983228511531 [2024-06-20 15:43:30,038 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 762 flow. Second operand 9 states and 253 transitions. [2024-06-20 15:43:30,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 181 transitions, 1464 flow [2024-06-20 15:43:30,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 181 transitions, 1407 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:43:30,096 INFO L231 Difference]: Finished difference. Result has 96 places, 119 transitions, 880 flow [2024-06-20 15:43:30,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=96, PETRI_TRANSITIONS=119} [2024-06-20 15:43:30,097 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-20 15:43:30,097 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 119 transitions, 880 flow [2024-06-20 15:43:30,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:30,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:30,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:30,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:43:30,098 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 15:43:30,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:30,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1205558110, now seen corresponding path program 2 times [2024-06-20 15:43:30,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:30,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045876268] [2024-06-20 15:43:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:30,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:31,249 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 15:43:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045876268] [2024-06-20 15:43:31,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045876268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:31,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:31,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293294385] [2024-06-20 15:43:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:31,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:31,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 119 transitions, 880 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:31,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:31,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:31,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:33,422 INFO L124 PetriNetUnfolderBase]: 10433/14725 cut-off events. [2024-06-20 15:43:33,422 INFO L125 PetriNetUnfolderBase]: For 173884/174095 co-relation queries the response was YES. [2024-06-20 15:43:33,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72749 conditions, 14725 events. 10433/14725 cut-off events. For 173884/174095 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 86221 event pairs, 4271 based on Foata normal form. 53/14714 useless extension candidates. Maximal degree in co-relation 72716. Up to 13833 conditions per place. [2024-06-20 15:43:33,552 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 121 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-06-20 15:43:33,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 168 transitions, 1366 flow [2024-06-20 15:43:33,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-20 15:43:33,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5235849056603774 [2024-06-20 15:43:33,554 INFO L175 Difference]: Start difference. First operand has 96 places, 119 transitions, 880 flow. Second operand 8 states and 222 transitions. [2024-06-20 15:43:33,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 168 transitions, 1366 flow [2024-06-20 15:43:33,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1293 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:33,653 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 891 flow [2024-06-20 15:43:33,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2024-06-20 15:43:33,654 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-20 15:43:33,654 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 891 flow [2024-06-20 15:43:33,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:33,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:33,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:33,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:43:33,655 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:33,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash 47404544, now seen corresponding path program 3 times [2024-06-20 15:43:33,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:33,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412059262] [2024-06-20 15:43:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:34,680 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 15:43:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:34,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412059262] [2024-06-20 15:43:34,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412059262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:34,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:34,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184719776] [2024-06-20 15:43:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:34,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:34,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:34,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:34,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:34,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:34,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:34,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:34,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:36,940 INFO L124 PetriNetUnfolderBase]: 10541/14906 cut-off events. [2024-06-20 15:43:36,941 INFO L125 PetriNetUnfolderBase]: For 191148/191353 co-relation queries the response was YES. [2024-06-20 15:43:37,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74836 conditions, 14906 events. 10541/14906 cut-off events. For 191148/191353 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 87746 event pairs, 4321 based on Foata normal form. 76/14920 useless extension candidates. Maximal degree in co-relation 74801. Up to 13908 conditions per place. [2024-06-20 15:43:37,107 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 99 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-20 15:43:37,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1391 flow [2024-06-20 15:43:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:37,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-20 15:43:37,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5259433962264151 [2024-06-20 15:43:37,109 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 891 flow. Second operand 8 states and 223 transitions. [2024-06-20 15:43:37,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1391 flow [2024-06-20 15:43:37,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 165 transitions, 1309 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 15:43:37,230 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 977 flow [2024-06-20 15:43:37,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-20 15:43:37,231 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-20 15:43:37,231 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 977 flow [2024-06-20 15:43:37,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:37,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:37,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:43:37,232 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:37,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1321033978, now seen corresponding path program 1 times [2024-06-20 15:43:37,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:37,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298170562] [2024-06-20 15:43:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:38,333 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 15:43:38,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:38,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298170562] [2024-06-20 15:43:38,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298170562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:38,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:38,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:38,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684970474] [2024-06-20 15:43:38,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:38,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:38,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:38,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:43:38,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 977 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 15:43:38,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:38,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:43:38,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:40,466 INFO L124 PetriNetUnfolderBase]: 10984/15428 cut-off events. [2024-06-20 15:43:40,467 INFO L125 PetriNetUnfolderBase]: For 216343/216354 co-relation queries the response was YES. [2024-06-20 15:43:40,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77894 conditions, 15428 events. 10984/15428 cut-off events. For 216343/216354 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87814 event pairs, 4681 based on Foata normal form. 14/15372 useless extension candidates. Maximal degree in co-relation 77858. Up to 14680 conditions per place. [2024-06-20 15:43:40,614 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 129 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-20 15:43:40,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 173 transitions, 1536 flow [2024-06-20 15:43:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-20 15:43:40,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-20 15:43:40,617 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 977 flow. Second operand 8 states and 214 transitions. [2024-06-20 15:43:40,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 173 transitions, 1536 flow [2024-06-20 15:43:40,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 1404 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:40,778 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1020 flow [2024-06-20 15:43:40,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-20 15:43:40,779 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-20 15:43:40,779 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1020 flow [2024-06-20 15:43:40,779 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 15:43:40,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:40,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:40,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:43:40,779 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 15:43:40,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash -532008544, now seen corresponding path program 1 times [2024-06-20 15:43:40,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:40,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221092741] [2024-06-20 15:43:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:40,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:41,608 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 15:43:41,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:41,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221092741] [2024-06-20 15:43:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221092741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598043180] [2024-06-20 15:43:41,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:41,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:41,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:43:41,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1020 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 15:43:41,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:41,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:43:41,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:43,556 INFO L124 PetriNetUnfolderBase]: 10937/15393 cut-off events. [2024-06-20 15:43:43,557 INFO L125 PetriNetUnfolderBase]: For 233562/233585 co-relation queries the response was YES. [2024-06-20 15:43:43,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79870 conditions, 15393 events. 10937/15393 cut-off events. For 233562/233585 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 88053 event pairs, 5117 based on Foata normal form. 23/15390 useless extension candidates. Maximal degree in co-relation 79832. Up to 14751 conditions per place. [2024-06-20 15:43:43,707 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 112 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-20 15:43:43,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 1558 flow [2024-06-20 15:43:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:43:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:43:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-20 15:43:43,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-20 15:43:43,709 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1020 flow. Second operand 6 states and 160 transitions. [2024-06-20 15:43:43,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 1558 flow [2024-06-20 15:43:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 161 transitions, 1446 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 15:43:43,844 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1103 flow [2024-06-20 15:43:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1103, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-20 15:43:43,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-20 15:43:43,845 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1103 flow [2024-06-20 15:43:43,845 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 15:43:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:43,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:43,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:43:43,846 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1527896576, now seen corresponding path program 4 times [2024-06-20 15:43:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950583307] [2024-06-20 15:43:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:44,918 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 15:43:44,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:44,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950583307] [2024-06-20 15:43:44,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950583307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:44,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:44,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:44,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869157953] [2024-06-20 15:43:44,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:44,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:44,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:44,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:44,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:45,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 15:43:45,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1103 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:45,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:45,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 15:43:45,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:47,064 INFO L124 PetriNetUnfolderBase]: 10667/15156 cut-off events. [2024-06-20 15:43:47,065 INFO L125 PetriNetUnfolderBase]: For 276180/276347 co-relation queries the response was YES. [2024-06-20 15:43:47,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83879 conditions, 15156 events. 10667/15156 cut-off events. For 276180/276347 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 89535 event pairs, 4276 based on Foata normal form. 46/15101 useless extension candidates. Maximal degree in co-relation 83840. Up to 14041 conditions per place. [2024-06-20 15:43:47,202 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 57 changer transitions 0/180 dead transitions. [2024-06-20 15:43:47,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 1633 flow [2024-06-20 15:43:47,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:47,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-06-20 15:43:47,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-20 15:43:47,204 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1103 flow. Second operand 8 states and 220 transitions. [2024-06-20 15:43:47,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 1633 flow [2024-06-20 15:43:47,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 1583 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 15:43:47,364 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1235 flow [2024-06-20 15:43:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1235, PETRI_PLACES=110, PETRI_TRANSITIONS=138} [2024-06-20 15:43:47,364 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-20 15:43:47,364 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1235 flow [2024-06-20 15:43:47,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states 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 15:43:47,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:47,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:43:47,365 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 15:43:47,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1521455768, now seen corresponding path program 2 times [2024-06-20 15:43:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:47,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591832795] [2024-06-20 15:43:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:48,414 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 15:43:48,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:48,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591832795] [2024-06-20 15:43:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591832795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:48,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:48,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:48,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976265213] [2024-06-20 15:43:48,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:48,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:48,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:48,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:48,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:43:48,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 138 transitions, 1235 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 15:43:48,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:48,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:43:48,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:50,667 INFO L124 PetriNetUnfolderBase]: 11171/15729 cut-off events. [2024-06-20 15:43:50,667 INFO L125 PetriNetUnfolderBase]: For 304655/304676 co-relation queries the response was YES. [2024-06-20 15:43:50,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88114 conditions, 15729 events. 11171/15729 cut-off events. For 304655/304676 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 89946 event pairs, 4689 based on Foata normal form. 20/15675 useless extension candidates. Maximal degree in co-relation 88073. Up to 14918 conditions per place. [2024-06-20 15:43:50,807 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 137 selfloop transitions, 43 changer transitions 0/191 dead transitions. [2024-06-20 15:43:50,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 1863 flow [2024-06-20 15:43:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-20 15:43:50,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-20 15:43:50,810 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1235 flow. Second operand 8 states and 210 transitions. [2024-06-20 15:43:50,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 1863 flow [2024-06-20 15:43:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 191 transitions, 1711 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:43:51,007 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1329 flow [2024-06-20 15:43:51,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1329, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2024-06-20 15:43:51,008 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-20 15:43:51,008 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1329 flow [2024-06-20 15:43:51,008 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 15:43:51,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:51,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:51,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:43:51,009 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:51,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1527711878, now seen corresponding path program 3 times [2024-06-20 15:43:51,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:51,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137453642] [2024-06-20 15:43:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:51,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:52,032 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 15:43:52,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:52,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137453642] [2024-06-20 15:43:52,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137453642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:52,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:52,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:52,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460642362] [2024-06-20 15:43:52,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:52,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:52,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:43:52,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1329 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 15:43:52,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:52,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:43:52,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:54,470 INFO L124 PetriNetUnfolderBase]: 11207/15781 cut-off events. [2024-06-20 15:43:54,470 INFO L125 PetriNetUnfolderBase]: For 336184/336205 co-relation queries the response was YES. [2024-06-20 15:43:54,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91508 conditions, 15781 events. 11207/15781 cut-off events. For 336184/336205 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90167 event pairs, 4713 based on Foata normal form. 20/15727 useless extension candidates. Maximal degree in co-relation 91465. Up to 14970 conditions per place. [2024-06-20 15:43:54,587 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 141 selfloop transitions, 42 changer transitions 0/194 dead transitions. [2024-06-20 15:43:54,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 194 transitions, 1905 flow [2024-06-20 15:43:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:54,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:43:54,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-20 15:43:54,589 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1329 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:43:54,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 194 transitions, 1905 flow [2024-06-20 15:43:54,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 194 transitions, 1795 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:43:54,759 INFO L231 Difference]: Finished difference. Result has 118 places, 152 transitions, 1389 flow [2024-06-20 15:43:54,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=118, PETRI_TRANSITIONS=152} [2024-06-20 15:43:54,759 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-20 15:43:54,760 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 152 transitions, 1389 flow [2024-06-20 15:43:54,760 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 15:43:54,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:54,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:54,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:43:54,760 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 15:43:54,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1291239848, now seen corresponding path program 4 times [2024-06-20 15:43:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:54,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599164646] [2024-06-20 15:43:54,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:54,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:55,778 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 15:43:55,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599164646] [2024-06-20 15:43:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599164646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:55,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:55,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:43:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980704211] [2024-06-20 15:43:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:55,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:43:55,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:43:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:43:55,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:43:55,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 152 transitions, 1389 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 15:43:55,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:43:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:43:58,089 INFO L124 PetriNetUnfolderBase]: 11192/15760 cut-off events. [2024-06-20 15:43:58,089 INFO L125 PetriNetUnfolderBase]: For 365556/365577 co-relation queries the response was YES. [2024-06-20 15:43:58,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92372 conditions, 15760 events. 11192/15760 cut-off events. For 365556/365577 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90004 event pairs, 4405 based on Foata normal form. 20/15706 useless extension candidates. Maximal degree in co-relation 92328. Up to 14821 conditions per place. [2024-06-20 15:43:58,226 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 54 changer transitions 0/198 dead transitions. [2024-06-20 15:43:58,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 198 transitions, 1981 flow [2024-06-20 15:43:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:43:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:43:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:43:58,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-20 15:43:58,227 INFO L175 Difference]: Start difference. First operand has 118 places, 152 transitions, 1389 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:43:58,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 198 transitions, 1981 flow [2024-06-20 15:43:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 198 transitions, 1809 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 15:43:58,433 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1417 flow [2024-06-20 15:43:58,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1417, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-20 15:43:58,440 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-20 15:43:58,441 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1417 flow [2024-06-20 15:43:58,441 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 15:43:58,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:43:58,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:43:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:43:58,441 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:43:58,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:43:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash 338293826, now seen corresponding path program 2 times [2024-06-20 15:43:58,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:43:58,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577517792] [2024-06-20 15:43:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:43:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:43:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:43:59,352 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 15:43:59,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:43:59,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577517792] [2024-06-20 15:43:59,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577517792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:43:59,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:43:59,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:43:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662631440] [2024-06-20 15:43:59,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:43:59,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:43:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:43:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:43:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:43:59,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:43:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1417 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 15:43:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:43:59,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:43:59,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:01,507 INFO L124 PetriNetUnfolderBase]: 11074/15608 cut-off events. [2024-06-20 15:44:01,507 INFO L125 PetriNetUnfolderBase]: For 383020/383035 co-relation queries the response was YES. [2024-06-20 15:44:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91799 conditions, 15608 events. 11074/15608 cut-off events. For 383020/383035 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 89570 event pairs, 5133 based on Foata normal form. 15/15575 useless extension candidates. Maximal degree in co-relation 91756. Up to 14942 conditions per place. [2024-06-20 15:44:01,642 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 119 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-20 15:44:01,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 173 transitions, 1781 flow [2024-06-20 15:44:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:44:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:44:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:44:01,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-20 15:44:01,644 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1417 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:44:01,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 173 transitions, 1781 flow [2024-06-20 15:44:01,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 1579 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-20 15:44:01,836 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1294 flow [2024-06-20 15:44:01,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1294, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-20 15:44:01,837 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-20 15:44:01,837 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1294 flow [2024-06-20 15:44:01,837 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 15:44:01,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:01,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:01,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:44:01,837 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 15:44:01,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash -526288672, now seen corresponding path program 1 times [2024-06-20 15:44:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125927866] [2024-06-20 15:44:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:02,681 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 15:44:02,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:02,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125927866] [2024-06-20 15:44:02,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125927866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:02,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:02,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:44:02,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057065523] [2024-06-20 15:44:02,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:02,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:44:02,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:02,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:44:02,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:44:02,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:02,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1294 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 15:44:02,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:02,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:02,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:04,635 INFO L124 PetriNetUnfolderBase]: 10333/14706 cut-off events. [2024-06-20 15:44:04,635 INFO L125 PetriNetUnfolderBase]: For 350893/350901 co-relation queries the response was YES. [2024-06-20 15:44:04,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86611 conditions, 14706 events. 10333/14706 cut-off events. For 350893/350901 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84414 event pairs, 4392 based on Foata normal form. 6/14676 useless extension candidates. Maximal degree in co-relation 86567. Up to 14061 conditions per place. [2024-06-20 15:44:04,766 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 157 selfloop transitions, 21 changer transitions 0/186 dead transitions. [2024-06-20 15:44:04,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 186 transitions, 1928 flow [2024-06-20 15:44:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:44:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:44:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-20 15:44:04,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-20 15:44:04,767 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1294 flow. Second operand 6 states and 157 transitions. [2024-06-20 15:44:04,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 186 transitions, 1928 flow [2024-06-20 15:44:05,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1827 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:05,017 INFO L231 Difference]: Finished difference. Result has 119 places, 163 transitions, 1372 flow [2024-06-20 15:44:05,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1372, PETRI_PLACES=119, PETRI_TRANSITIONS=163} [2024-06-20 15:44:05,018 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-20 15:44:05,018 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 163 transitions, 1372 flow [2024-06-20 15:44:05,018 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 15:44:05,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:05,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:05,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:44:05,019 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 15:44:05,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash 366899138, now seen corresponding path program 2 times [2024-06-20 15:44:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500924821] [2024-06-20 15:44:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:05,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:05,838 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 15:44:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:05,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500924821] [2024-06-20 15:44:05,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500924821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:05,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:05,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:44:05,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555327445] [2024-06-20 15:44:05,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:44:05,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:44:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:44:05,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:05,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 163 transitions, 1372 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 15:44:05,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:05,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:05,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:07,803 INFO L124 PetriNetUnfolderBase]: 10326/14730 cut-off events. [2024-06-20 15:44:07,803 INFO L125 PetriNetUnfolderBase]: For 380927/380935 co-relation queries the response was YES. [2024-06-20 15:44:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89632 conditions, 14730 events. 10326/14730 cut-off events. For 380927/380935 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84769 event pairs, 4411 based on Foata normal form. 6/14699 useless extension candidates. Maximal degree in co-relation 89587. Up to 14054 conditions per place. [2024-06-20 15:44:07,928 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 152 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2024-06-20 15:44:07,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 1774 flow [2024-06-20 15:44:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:44:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:44:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:44:07,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-20 15:44:07,929 INFO L175 Difference]: Start difference. First operand has 119 places, 163 transitions, 1372 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:44:07,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 1774 flow [2024-06-20 15:44:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1670 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-20 15:44:08,217 INFO L231 Difference]: Finished difference. Result has 123 places, 163 transitions, 1319 flow [2024-06-20 15:44:08,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1319, PETRI_PLACES=123, PETRI_TRANSITIONS=163} [2024-06-20 15:44:08,218 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-20 15:44:08,218 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 163 transitions, 1319 flow [2024-06-20 15:44:08,218 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 15:44:08,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:08,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:08,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:44:08,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:44:08,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1475267960, now seen corresponding path program 1 times [2024-06-20 15:44:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128514715] [2024-06-20 15:44:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:09,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:09,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:09,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128514715] [2024-06-20 15:44:09,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128514715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:09,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:09,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:09,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790621320] [2024-06-20 15:44:09,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:09,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:09,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:09,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:09,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:09,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:09,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 163 transitions, 1319 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:09,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:09,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:09,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:11,817 INFO L124 PetriNetUnfolderBase]: 11550/16291 cut-off events. [2024-06-20 15:44:11,817 INFO L125 PetriNetUnfolderBase]: For 495519/495524 co-relation queries the response was YES. [2024-06-20 15:44:11,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102845 conditions, 16291 events. 11550/16291 cut-off events. For 495519/495524 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 93601 event pairs, 4679 based on Foata normal form. 18/16176 useless extension candidates. Maximal degree in co-relation 102798. Up to 14825 conditions per place. [2024-06-20 15:44:11,974 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 142 selfloop transitions, 79 changer transitions 0/234 dead transitions. [2024-06-20 15:44:11,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 234 transitions, 2156 flow [2024-06-20 15:44:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:44:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:44:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-20 15:44:11,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5157232704402516 [2024-06-20 15:44:11,976 INFO L175 Difference]: Start difference. First operand has 123 places, 163 transitions, 1319 flow. Second operand 9 states and 246 transitions. [2024-06-20 15:44:11,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 234 transitions, 2156 flow [2024-06-20 15:44:12,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 234 transitions, 2099 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:12,300 INFO L231 Difference]: Finished difference. Result has 129 places, 179 transitions, 1678 flow [2024-06-20 15:44:12,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1678, PETRI_PLACES=129, PETRI_TRANSITIONS=179} [2024-06-20 15:44:12,301 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 73 predicate places. [2024-06-20 15:44:12,301 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 179 transitions, 1678 flow [2024-06-20 15:44:12,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:12,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:12,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:12,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:44:12,302 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 15:44:12,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1883349352, now seen corresponding path program 1 times [2024-06-20 15:44:12,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:12,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124159478] [2024-06-20 15:44:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:12,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:13,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:13,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124159478] [2024-06-20 15:44:13,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124159478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:13,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:13,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:13,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270091841] [2024-06-20 15:44:13,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:13,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:13,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:13,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:13,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:13,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:13,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 179 transitions, 1678 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 15:44:13,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:13,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:13,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:15,692 INFO L124 PetriNetUnfolderBase]: 11383/16126 cut-off events. [2024-06-20 15:44:15,693 INFO L125 PetriNetUnfolderBase]: For 521380/521403 co-relation queries the response was YES. [2024-06-20 15:44:15,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103641 conditions, 16126 events. 11383/16126 cut-off events. For 521380/521403 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 93339 event pairs, 4911 based on Foata normal form. 24/16109 useless extension candidates. Maximal degree in co-relation 103591. Up to 15304 conditions per place. [2024-06-20 15:44:15,858 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 155 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-20 15:44:15,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2412 flow [2024-06-20 15:44:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:15,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-20 15:44:15,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-20 15:44:15,860 INFO L175 Difference]: Start difference. First operand has 129 places, 179 transitions, 1678 flow. Second operand 7 states and 187 transitions. [2024-06-20 15:44:15,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2412 flow [2024-06-20 15:44:16,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 219 transitions, 2250 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:44:16,293 INFO L231 Difference]: Finished difference. Result has 132 places, 187 transitions, 1763 flow [2024-06-20 15:44:16,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1763, PETRI_PLACES=132, PETRI_TRANSITIONS=187} [2024-06-20 15:44:16,293 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-20 15:44:16,294 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 187 transitions, 1763 flow [2024-06-20 15:44:16,294 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 15:44:16,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:16,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:44:16,294 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:44:16,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -963832916, now seen corresponding path program 2 times [2024-06-20 15:44:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:16,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243911613] [2024-06-20 15:44:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:16,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:17,699 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 15:44:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243911613] [2024-06-20 15:44:17,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243911613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:17,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:17,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:17,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791737791] [2024-06-20 15:44:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:17,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:17,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:17,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:17,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:17,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:17,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 187 transitions, 1763 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:17,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:17,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:17,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:20,947 INFO L124 PetriNetUnfolderBase]: 11832/16755 cut-off events. [2024-06-20 15:44:20,948 INFO L125 PetriNetUnfolderBase]: For 583181/583186 co-relation queries the response was YES. [2024-06-20 15:44:21,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112112 conditions, 16755 events. 11832/16755 cut-off events. For 583181/583186 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97249 event pairs, 4703 based on Foata normal form. 18/16658 useless extension candidates. Maximal degree in co-relation 112061. Up to 15398 conditions per place. [2024-06-20 15:44:21,102 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 152 selfloop transitions, 86 changer transitions 0/251 dead transitions. [2024-06-20 15:44:21,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 251 transitions, 2580 flow [2024-06-20 15:44:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:44:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:44:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-20 15:44:21,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-20 15:44:21,110 INFO L175 Difference]: Start difference. First operand has 132 places, 187 transitions, 1763 flow. Second operand 9 states and 243 transitions. [2024-06-20 15:44:21,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 251 transitions, 2580 flow [2024-06-20 15:44:21,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 251 transitions, 2504 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 15:44:21,551 INFO L231 Difference]: Finished difference. Result has 140 places, 199 transitions, 2072 flow [2024-06-20 15:44:21,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2072, PETRI_PLACES=140, PETRI_TRANSITIONS=199} [2024-06-20 15:44:21,556 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-20 15:44:21,556 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 199 transitions, 2072 flow [2024-06-20 15:44:21,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:21,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:21,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:44:21,557 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:44:21,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1373728166, now seen corresponding path program 3 times [2024-06-20 15:44:21,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:21,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846822071] [2024-06-20 15:44:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:22,870 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 15:44:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:22,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846822071] [2024-06-20 15:44:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846822071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:22,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:22,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:22,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035740353] [2024-06-20 15:44:22,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:22,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:22,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:23,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:23,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 199 transitions, 2072 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:23,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:23,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:23,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:26,033 INFO L124 PetriNetUnfolderBase]: 12033/17069 cut-off events. [2024-06-20 15:44:26,033 INFO L125 PetriNetUnfolderBase]: For 642116/642137 co-relation queries the response was YES. [2024-06-20 15:44:26,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117623 conditions, 17069 events. 12033/17069 cut-off events. For 642116/642137 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 99572 event pairs, 4349 based on Foata normal form. 18/16969 useless extension candidates. Maximal degree in co-relation 117568. Up to 14728 conditions per place. [2024-06-20 15:44:26,224 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 141 selfloop transitions, 106 changer transitions 0/260 dead transitions. [2024-06-20 15:44:26,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 260 transitions, 3062 flow [2024-06-20 15:44:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:44:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:44:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-20 15:44:26,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2024-06-20 15:44:26,240 INFO L175 Difference]: Start difference. First operand has 140 places, 199 transitions, 2072 flow. Second operand 9 states and 245 transitions. [2024-06-20 15:44:26,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 260 transitions, 3062 flow [2024-06-20 15:44:26,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 260 transitions, 2907 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 15:44:26,832 INFO L231 Difference]: Finished difference. Result has 147 places, 205 transitions, 2381 flow [2024-06-20 15:44:26,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2381, PETRI_PLACES=147, PETRI_TRANSITIONS=205} [2024-06-20 15:44:26,833 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-20 15:44:26,833 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 205 transitions, 2381 flow [2024-06-20 15:44:26,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:26,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:26,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:26,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:44:26,834 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 15:44:26,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash -114426504, now seen corresponding path program 4 times [2024-06-20 15:44:26,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:26,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16964985] [2024-06-20 15:44:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:26,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:27,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16964985] [2024-06-20 15:44:27,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16964985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:27,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:27,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:44:27,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598866623] [2024-06-20 15:44:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:27,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:44:27,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:44:27,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:44:28,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:28,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 205 transitions, 2381 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:28,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:28,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:28,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:30,976 INFO L124 PetriNetUnfolderBase]: 11977/17005 cut-off events. [2024-06-20 15:44:30,977 INFO L125 PetriNetUnfolderBase]: For 669238/669243 co-relation queries the response was YES. [2024-06-20 15:44:31,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117360 conditions, 17005 events. 11977/17005 cut-off events. For 669238/669243 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 99155 event pairs, 4730 based on Foata normal form. 18/16913 useless extension candidates. Maximal degree in co-relation 117303. Up to 15621 conditions per place. [2024-06-20 15:44:31,134 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 159 selfloop transitions, 84 changer transitions 0/256 dead transitions. [2024-06-20 15:44:31,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 256 transitions, 3007 flow [2024-06-20 15:44:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:44:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:44:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-20 15:44:31,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-20 15:44:31,136 INFO L175 Difference]: Start difference. First operand has 147 places, 205 transitions, 2381 flow. Second operand 9 states and 243 transitions. [2024-06-20 15:44:31,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 256 transitions, 3007 flow [2024-06-20 15:44:31,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 256 transitions, 2829 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:31,634 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 2334 flow [2024-06-20 15:44:31,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2334, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-20 15:44:31,635 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-20 15:44:31,635 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 2334 flow [2024-06-20 15:44:31,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 15:44:31,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:31,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:31,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:44:31,636 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 15:44:31,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1042284480, now seen corresponding path program 2 times [2024-06-20 15:44:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:31,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26371955] [2024-06-20 15:44:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:32,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:32,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26371955] [2024-06-20 15:44:32,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26371955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:32,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:32,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:32,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364188609] [2024-06-20 15:44:32,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:32,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:32,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:32,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:32,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 2334 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 15:44:32,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:32,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:32,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:35,477 INFO L124 PetriNetUnfolderBase]: 11745/16717 cut-off events. [2024-06-20 15:44:35,477 INFO L125 PetriNetUnfolderBase]: For 671982/672063 co-relation queries the response was YES. [2024-06-20 15:44:35,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114557 conditions, 16717 events. 11745/16717 cut-off events. For 671982/672063 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97952 event pairs, 4959 based on Foata normal form. 29/16663 useless extension candidates. Maximal degree in co-relation 114498. Up to 15847 conditions per place. [2024-06-20 15:44:35,661 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 165 selfloop transitions, 50 changer transitions 0/234 dead transitions. [2024-06-20 15:44:35,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 3032 flow [2024-06-20 15:44:35,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:35,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:44:35,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-20 15:44:35,663 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 2334 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:44:35,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 3032 flow [2024-06-20 15:44:36,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 234 transitions, 2754 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 15:44:36,255 INFO L231 Difference]: Finished difference. Result has 149 places, 208 transitions, 2241 flow [2024-06-20 15:44:36,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2241, PETRI_PLACES=149, PETRI_TRANSITIONS=208} [2024-06-20 15:44:36,256 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 93 predicate places. [2024-06-20 15:44:36,256 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 208 transitions, 2241 flow [2024-06-20 15:44:36,256 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 15:44:36,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:36,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:36,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:44:36,257 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 15:44:36,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1041868770, now seen corresponding path program 3 times [2024-06-20 15:44:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:36,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480155144] [2024-06-20 15:44:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:36,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:37,246 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 15:44:37,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:37,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480155144] [2024-06-20 15:44:37,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480155144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:37,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:37,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:37,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2819176] [2024-06-20 15:44:37,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:37,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:37,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:37,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:37,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 208 transitions, 2241 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 15:44:37,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:37,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:37,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:40,197 INFO L124 PetriNetUnfolderBase]: 11725/16685 cut-off events. [2024-06-20 15:44:40,197 INFO L125 PetriNetUnfolderBase]: For 693107/693188 co-relation queries the response was YES. [2024-06-20 15:44:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114274 conditions, 16685 events. 11725/16685 cut-off events. For 693107/693188 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97711 event pairs, 4953 based on Foata normal form. 25/16631 useless extension candidates. Maximal degree in co-relation 114216. Up to 15833 conditions per place. [2024-06-20 15:44:40,365 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 165 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-20 15:44:40,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2743 flow [2024-06-20 15:44:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:44:40,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-20 15:44:40,367 INFO L175 Difference]: Start difference. First operand has 149 places, 208 transitions, 2241 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:44:40,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2743 flow [2024-06-20 15:44:40,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 233 transitions, 2563 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 15:44:40,913 INFO L231 Difference]: Finished difference. Result has 152 places, 208 transitions, 2168 flow [2024-06-20 15:44:40,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2168, PETRI_PLACES=152, PETRI_TRANSITIONS=208} [2024-06-20 15:44:40,914 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-20 15:44:40,914 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 208 transitions, 2168 flow [2024-06-20 15:44:40,914 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 15:44:40,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:40,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:40,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:44:40,914 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 15:44:40,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1035619356, now seen corresponding path program 1 times [2024-06-20 15:44:40,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817643090] [2024-06-20 15:44:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:42,026 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 15:44:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:42,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817643090] [2024-06-20 15:44:42,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817643090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:42,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:42,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:42,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310131727] [2024-06-20 15:44:42,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:42,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:42,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:42,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 208 transitions, 2168 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 15:44:42,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:42,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:42,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:44,825 INFO L124 PetriNetUnfolderBase]: 11105/15953 cut-off events. [2024-06-20 15:44:44,826 INFO L125 PetriNetUnfolderBase]: For 622491/622493 co-relation queries the response was YES. [2024-06-20 15:44:44,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107828 conditions, 15953 events. 11105/15953 cut-off events. For 622491/622493 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93651 event pairs, 4330 based on Foata normal form. 2/15915 useless extension candidates. Maximal degree in co-relation 107769. Up to 15215 conditions per place. [2024-06-20 15:44:44,960 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 214 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2024-06-20 15:44:44,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 240 transitions, 2800 flow [2024-06-20 15:44:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:44,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 15:44:44,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-20 15:44:44,961 INFO L175 Difference]: Start difference. First operand has 152 places, 208 transitions, 2168 flow. Second operand 7 states and 177 transitions. [2024-06-20 15:44:44,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 240 transitions, 2800 flow [2024-06-20 15:44:45,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 240 transitions, 2660 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:44:45,497 INFO L231 Difference]: Finished difference. Result has 152 places, 212 transitions, 2161 flow [2024-06-20 15:44:45,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2161, PETRI_PLACES=152, PETRI_TRANSITIONS=212} [2024-06-20 15:44:45,498 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-20 15:44:45,498 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 212 transitions, 2161 flow [2024-06-20 15:44:45,498 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 15:44:45,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:45,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:45,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:44:45,499 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 15:44:45,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:45,499 INFO L85 PathProgramCache]: Analyzing trace with hash 864921762, now seen corresponding path program 1 times [2024-06-20 15:44:45,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:45,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294032486] [2024-06-20 15:44:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:45,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:44:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:44:46,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:44:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294032486] [2024-06-20 15:44:46,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294032486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:44:46,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:44:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:44:46,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735727627] [2024-06-20 15:44:46,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:44:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:44:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:44:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:44:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:44:46,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 15:44:46,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 212 transitions, 2161 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 15:44:46,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:44:46,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 15:44:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:44:49,284 INFO L124 PetriNetUnfolderBase]: 11137/15997 cut-off events. [2024-06-20 15:44:49,285 INFO L125 PetriNetUnfolderBase]: For 663255/663260 co-relation queries the response was YES. [2024-06-20 15:44:49,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111027 conditions, 15997 events. 11137/15997 cut-off events. For 663255/663260 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 93871 event pairs, 4305 based on Foata normal form. 4/15957 useless extension candidates. Maximal degree in co-relation 110967. Up to 15184 conditions per place. [2024-06-20 15:44:49,460 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 211 selfloop transitions, 31 changer transitions 0/250 dead transitions. [2024-06-20 15:44:49,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 250 transitions, 3017 flow [2024-06-20 15:44:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:44:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:44:49,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:44:49,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-20 15:44:49,462 INFO L175 Difference]: Start difference. First operand has 152 places, 212 transitions, 2161 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:44:49,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 250 transitions, 3017 flow [2024-06-20 15:44:50,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 250 transitions, 2914 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 15:44:50,254 INFO L231 Difference]: Finished difference. Result has 154 places, 220 transitions, 2293 flow [2024-06-20 15:44:50,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2293, PETRI_PLACES=154, PETRI_TRANSITIONS=220} [2024-06-20 15:44:50,255 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-20 15:44:50,255 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 220 transitions, 2293 flow [2024-06-20 15:44:50,255 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 15:44:50,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:44:50,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:44:50,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:44:50,256 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 15:44:50,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:44:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash 864921576, now seen corresponding path program 2 times [2024-06-20 15:44:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:44:50,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556893921] [2024-06-20 15:44:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:44:50,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:44:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat