./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 cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-cde23df-m [2024-06-14 11:47:46,158 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:47:46,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:47:46,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:47:46,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:47:46,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:47:46,237 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:47:46,238 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:47:46,238 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:47:46,238 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:47:46,239 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:47:46,239 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:47:46,252 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:47:46,253 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:47:46,253 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:47:46,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:47:46,253 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:47:46,254 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:47:46,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:47:46,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:47:46,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:47:46,255 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:47:46,255 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:47:46,255 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:47:46,255 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:47:46,256 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:47:46,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:47:46,256 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:47:46,256 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:47:46,256 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:47:46,257 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:47:46,257 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:47:46,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:47:46,257 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:47:46,257 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:47:46,258 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:47:46,258 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:47:46,258 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:47:46,258 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:47:46,258 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:47:46,259 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:47:46,259 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:47:46,259 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:47:46,259 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:47:46,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:47:46,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:47:46,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:47:46,433 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:47:46,433 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:47:46,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-14 11:47:47,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:47:47,727 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:47:47,728 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix004.opt.i [2024-06-14 11:47:47,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772aa0913/273b3243609648a6b66504e0db0c74e1/FLAGa14d4da18 [2024-06-14 11:47:47,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772aa0913/273b3243609648a6b66504e0db0c74e1 [2024-06-14 11:47:47,752 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:47:47,752 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:47:47,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix004.opt.yml/witness.yml [2024-06-14 11:47:47,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:47:47,967 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:47:47,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:47:47,969 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:47:47,972 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:47:47,973 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:47:47" (1/2) ... [2024-06-14 11:47:47,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3904c362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:47:47, skipping insertion in model container [2024-06-14 11:47:47,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:47:47" (1/2) ... [2024-06-14 11:47:47,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@744fcb05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:47:47, skipping insertion in model container [2024-06-14 11:47:47,976 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:47:47" (2/2) ... [2024-06-14 11:47:47,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3904c362 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:47, skipping insertion in model container [2024-06-14 11:47:47,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:47:47" (2/2) ... [2024-06-14 11:47:47,977 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:47:48,074 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:47:48,075 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$w_buff1 == 1))) [2024-06-14 11:47:48,076 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((! multithreaded || z$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))) [2024-06-14 11:47:48,076 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$w_buff1 == 1))) [2024-06-14 11:47:48,076 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((! multithreaded || z$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))) [2024-06-14 11:47:48,076 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:47:48,077 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-14 11:47:48,112 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:47:48,445 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:47:48,454 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:47:48,573 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:47:48,616 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:47:48,617 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48 WrapperNode [2024-06-14 11:47:48,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:47:48,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:47:48,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:47:48,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:47:48,624 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 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,646 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 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,685 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-14 11:47:48,685 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:47:48,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:47:48,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:47:48,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:47:48,693 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,696 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,709 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:47:48,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,743 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,744 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:47:48,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:47:48,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:47:48,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:47:48,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (1/1) ... [2024-06-14 11:47:48,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:47:48,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:47:48,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:47:48,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:47:48,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:47:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:47:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:47:48,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:47:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:47:48,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:47:48,813 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:47:48,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:47:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:47:48,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:47:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:47:48,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:47:48,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:47:48,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:47:48,816 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:47:48,955 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:47:48,957 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:47:49,353 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:47:49,353 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:47:49,542 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:47:49,543 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:47:49,543 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:47:49 BoogieIcfgContainer [2024-06-14 11:47:49,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:47:49,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:47:49,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:47:49,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:47:49,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:47:47" (1/4) ... [2024-06-14 11:47:49,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c3d354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:47:49, skipping insertion in model container [2024-06-14 11:47:49,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:47:47" (2/4) ... [2024-06-14 11:47:49,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c3d354 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:47:49, skipping insertion in model container [2024-06-14 11:47:49,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:47:48" (3/4) ... [2024-06-14 11:47:49,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c3d354 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:47:49, skipping insertion in model container [2024-06-14 11:47:49,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:47:49" (4/4) ... [2024-06-14 11:47:49,553 INFO L112 eAbstractionObserver]: Analyzing ICFG mix004.opt.i [2024-06-14 11:47:49,566 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:47:49,566 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:47:49,566 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:47:49,615 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:47:49,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:47:49,678 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 11:47:49,678 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:47:49,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:47:49,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 11:47:49,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 11:47:49,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:47:49,704 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;@75a509db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:47:49,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:47:49,708 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:47:49,708 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:47:49,708 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:47:49,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:49,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:47:49,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:47:49,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash 29511510, now seen corresponding path program 1 times [2024-06-14 11:47:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822736725] [2024-06-14 11:47:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:49,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:50,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822736725] [2024-06-14 11:47:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822736725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:47:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304113856] [2024-06-14 11:47:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:50,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:47:50,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:47:50,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:47:50,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 54 [2024-06-14 11:47:50,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:50,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:50,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 54 [2024-06-14 11:47:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:51,958 INFO L124 PetriNetUnfolderBase]: 4867/7028 cut-off events. [2024-06-14 11:47:51,959 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-14 11:47:51,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13942 conditions, 7028 events. 4867/7028 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 40671 event pairs, 3534 based on Foata normal form. 1/6809 useless extension candidates. Maximal degree in co-relation 13926. Up to 6693 conditions per place. [2024-06-14 11:47:52,004 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 42 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 11:47:52,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 231 flow [2024-06-14 11:47:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:47:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:47:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-06-14 11:47:52,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2024-06-14 11:47:52,015 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 105 transitions. [2024-06-14 11:47:52,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 231 flow [2024-06-14 11:47:52,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:52,020 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 11:47:52,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 11:47:52,023 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 11:47:52,024 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 11:47:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:52,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:52,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:52,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:47:52,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:47:52,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1704151819, now seen corresponding path program 1 times [2024-06-14 11:47:52,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:52,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780466460] [2024-06-14 11:47:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:52,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:52,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780466460] [2024-06-14 11:47:52,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780466460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:52,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:52,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:47:52,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749916549] [2024-06-14 11:47:52,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:52,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:47:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:47:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:47:52,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-14 11:47:52,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:52,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:52,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-14 11:47:52,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:53,768 INFO L124 PetriNetUnfolderBase]: 5569/7858 cut-off events. [2024-06-14 11:47:53,768 INFO L125 PetriNetUnfolderBase]: For 1758/1758 co-relation queries the response was YES. [2024-06-14 11:47:53,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18047 conditions, 7858 events. 5569/7858 cut-off events. For 1758/1758 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 44525 event pairs, 3437 based on Foata normal form. 4/7817 useless extension candidates. Maximal degree in co-relation 18032. Up to 7610 conditions per place. [2024-06-14 11:47:53,802 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 53 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 11:47:53,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 325 flow [2024-06-14 11:47:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:47:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:47:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-06-14 11:47:53,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2024-06-14 11:47:53,804 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 134 transitions. [2024-06-14 11:47:53,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 325 flow [2024-06-14 11:47:53,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:47:53,806 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 11:47:53,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 11:47:53,807 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 11:47:53,807 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 11:47:53,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:53,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:53,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:53,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:47:53,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:47:53,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1871535232, now seen corresponding path program 1 times [2024-06-14 11:47:53,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:53,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402976806] [2024-06-14 11:47:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:53,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:54,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:54,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402976806] [2024-06-14 11:47:54,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402976806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:54,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:54,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:47:54,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776768010] [2024-06-14 11:47:54,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:47:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:47:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:47:54,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:47:54,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 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) [2024-06-14 11:47:54,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:54,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:47:54,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:55,988 INFO L124 PetriNetUnfolderBase]: 7070/9910 cut-off events. [2024-06-14 11:47:55,989 INFO L125 PetriNetUnfolderBase]: For 6002/6002 co-relation queries the response was YES. [2024-06-14 11:47:56,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25346 conditions, 9910 events. 7070/9910 cut-off events. For 6002/6002 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 55926 event pairs, 3323 based on Foata normal form. 8/9860 useless extension candidates. Maximal degree in co-relation 25329. Up to 9556 conditions per place. [2024-06-14 11:47:56,040 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 71 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-14 11:47:56,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 490 flow [2024-06-14 11:47:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-14 11:47:56,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771604938271605 [2024-06-14 11:47:56,043 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-06-14 11:47:56,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 490 flow [2024-06-14 11:47:56,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 462 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:47:56,046 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-14 11:47:56,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 11:47:56,047 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-14 11:47:56,047 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-14 11:47:56,047 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) [2024-06-14 11:47:56,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:56,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:56,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:47:56,048 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)] === [2024-06-14 11:47:56,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:56,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1158390029, now seen corresponding path program 1 times [2024-06-14 11:47:56,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892954535] [2024-06-14 11:47:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:56,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:56,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892954535] [2024-06-14 11:47:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892954535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:56,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:56,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:47:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086297580] [2024-06-14 11:47:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:47:56,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:47:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:47:57,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 11:47:57,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:57,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:57,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 11:47:57,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:58,152 INFO L124 PetriNetUnfolderBase]: 6156/8927 cut-off events. [2024-06-14 11:47:58,152 INFO L125 PetriNetUnfolderBase]: For 9719/9719 co-relation queries the response was YES. [2024-06-14 11:47:58,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24970 conditions, 8927 events. 6156/8927 cut-off events. For 9719/9719 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 52119 event pairs, 3157 based on Foata normal form. 3/8829 useless extension candidates. Maximal degree in co-relation 24951. Up to 8408 conditions per place. [2024-06-14 11:47:58,199 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 59 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 11:47:58,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 449 flow [2024-06-14 11:47:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:47:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:47:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-14 11:47:58,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-14 11:47:58,202 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 141 transitions. [2024-06-14 11:47:58,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 449 flow [2024-06-14 11:47:58,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 411 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:58,210 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-14 11:47:58,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 11:47:58,212 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-14 11:47:58,212 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-14 11:47:58,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:58,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:58,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:47:58,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:47:58,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 433405834, now seen corresponding path program 1 times [2024-06-14 11:47:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428857566] [2024-06-14 11:47:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:58,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428857566] [2024-06-14 11:47:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428857566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:59,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:59,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508754864] [2024-06-14 11:47:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:59,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:59,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:59,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:47:59,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:59,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:59,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:47:59,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:00,435 INFO L124 PetriNetUnfolderBase]: 7083/9980 cut-off events. [2024-06-14 11:48:00,435 INFO L125 PetriNetUnfolderBase]: For 17563/17585 co-relation queries the response was YES. [2024-06-14 11:48:00,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30789 conditions, 9980 events. 7083/9980 cut-off events. For 17563/17585 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56574 event pairs, 3533 based on Foata normal form. 5/9962 useless extension candidates. Maximal degree in co-relation 30768. Up to 9589 conditions per place. [2024-06-14 11:48:00,495 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 70 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-14 11:48:00,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 606 flow [2024-06-14 11:48:00,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-14 11:48:00,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 11:48:00,497 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 171 transitions. [2024-06-14 11:48:00,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 606 flow [2024-06-14 11:48:00,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 577 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:00,501 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 356 flow [2024-06-14 11:48:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-14 11:48:00,501 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-14 11:48:00,502 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 356 flow [2024-06-14 11:48:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:00,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:00,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:48:00,502 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:00,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1646609038, now seen corresponding path program 2 times [2024-06-14 11:48:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173190387] [2024-06-14 11:48:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:01,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:01,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173190387] [2024-06-14 11:48:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173190387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:01,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143653884] [2024-06-14 11:48:01,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:01,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:01,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:01,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:01,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:01,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:01,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:02,705 INFO L124 PetriNetUnfolderBase]: 7074/9983 cut-off events. [2024-06-14 11:48:02,705 INFO L125 PetriNetUnfolderBase]: For 25680/25723 co-relation queries the response was YES. [2024-06-14 11:48:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33463 conditions, 9983 events. 7074/9983 cut-off events. For 25680/25723 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 56857 event pairs, 3536 based on Foata normal form. 25/9986 useless extension candidates. Maximal degree in co-relation 33441. Up to 9580 conditions per place. [2024-06-14 11:48:02,757 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 64 selfloop transitions, 21 changer transitions 0/94 dead transitions. [2024-06-14 11:48:02,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 588 flow [2024-06-14 11:48:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 11:48:02,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-06-14 11:48:02,760 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 356 flow. Second operand 6 states and 165 transitions. [2024-06-14 11:48:02,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 588 flow [2024-06-14 11:48:02,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 542 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 11:48:02,790 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 363 flow [2024-06-14 11:48:02,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-14 11:48:02,793 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-14 11:48:02,793 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 363 flow [2024-06-14 11:48:02,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:02,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:02,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:48:02,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:02,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1608998124, now seen corresponding path program 1 times [2024-06-14 11:48:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:02,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305002429] [2024-06-14 11:48:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:02,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:03,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:03,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305002429] [2024-06-14 11:48:03,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305002429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:03,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733909654] [2024-06-14 11:48:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:03,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:03,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:03,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:03,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:03,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:03,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:03,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:03,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:03,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:05,392 INFO L124 PetriNetUnfolderBase]: 7165/10137 cut-off events. [2024-06-14 11:48:05,393 INFO L125 PetriNetUnfolderBase]: For 29411/29449 co-relation queries the response was YES. [2024-06-14 11:48:05,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34353 conditions, 10137 events. 7165/10137 cut-off events. For 29411/29449 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 57644 event pairs, 3526 based on Foata normal form. 7/10125 useless extension candidates. Maximal degree in co-relation 34329. Up to 9682 conditions per place. [2024-06-14 11:48:05,502 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 88 selfloop transitions, 32 changer transitions 0/129 dead transitions. [2024-06-14 11:48:05,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 129 transitions, 824 flow [2024-06-14 11:48:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-14 11:48:05,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 11:48:05,504 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 363 flow. Second operand 8 states and 222 transitions. [2024-06-14 11:48:05,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 129 transitions, 824 flow [2024-06-14 11:48:05,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 129 transitions, 750 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:05,520 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 515 flow [2024-06-14 11:48:05,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=76, PETRI_TRANSITIONS=89} [2024-06-14 11:48:05,521 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-14 11:48:05,521 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 515 flow [2024-06-14 11:48:05,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:05,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:05,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:05,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:48:05,522 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:05,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -640703870, now seen corresponding path program 2 times [2024-06-14 11:48:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181650868] [2024-06-14 11:48:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:06,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:06,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181650868] [2024-06-14 11:48:06,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181650868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:06,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:06,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:06,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957418344] [2024-06-14 11:48:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:06,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:06,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:06,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:06,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:06,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 89 transitions, 515 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:06,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:06,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:06,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:08,082 INFO L124 PetriNetUnfolderBase]: 7187/10161 cut-off events. [2024-06-14 11:48:08,082 INFO L125 PetriNetUnfolderBase]: For 40068/40132 co-relation queries the response was YES. [2024-06-14 11:48:08,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37370 conditions, 10161 events. 7187/10161 cut-off events. For 40068/40132 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 57554 event pairs, 3446 based on Foata normal form. 11/10155 useless extension candidates. Maximal degree in co-relation 37344. Up to 9689 conditions per place. [2024-06-14 11:48:08,150 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 88 selfloop transitions, 34 changer transitions 0/131 dead transitions. [2024-06-14 11:48:08,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 131 transitions, 929 flow [2024-06-14 11:48:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 11:48:08,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 11:48:08,154 INFO L175 Difference]: Start difference. First operand has 76 places, 89 transitions, 515 flow. Second operand 7 states and 195 transitions. [2024-06-14 11:48:08,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 131 transitions, 929 flow [2024-06-14 11:48:08,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 131 transitions, 871 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:08,176 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 592 flow [2024-06-14 11:48:08,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-14 11:48:08,179 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-06-14 11:48:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 592 flow [2024-06-14 11:48:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:08,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:08,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:48:08,180 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)] === [2024-06-14 11:48:08,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash -640583900, now seen corresponding path program 3 times [2024-06-14 11:48:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169253862] [2024-06-14 11:48:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:09,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:09,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169253862] [2024-06-14 11:48:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169253862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:09,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:09,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:09,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593654364] [2024-06-14 11:48:09,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:09,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:09,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:09,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:09,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 592 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:09,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:09,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:09,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:10,832 INFO L124 PetriNetUnfolderBase]: 7209/10196 cut-off events. [2024-06-14 11:48:10,832 INFO L125 PetriNetUnfolderBase]: For 52633/52691 co-relation queries the response was YES. [2024-06-14 11:48:10,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40253 conditions, 10196 events. 7209/10196 cut-off events. For 52633/52691 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 57898 event pairs, 3397 based on Foata normal form. 21/10196 useless extension candidates. Maximal degree in co-relation 40226. Up to 9633 conditions per place. [2024-06-14 11:48:10,912 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 78 selfloop transitions, 50 changer transitions 0/137 dead transitions. [2024-06-14 11:48:10,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1106 flow [2024-06-14 11:48:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-14 11:48:10,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 11:48:10,913 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 592 flow. Second operand 7 states and 199 transitions. [2024-06-14 11:48:10,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1106 flow [2024-06-14 11:48:10,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 137 transitions, 987 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:10,944 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 698 flow [2024-06-14 11:48:10,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=698, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-14 11:48:10,945 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 11:48:10,945 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 698 flow [2024-06-14 11:48:10,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:10,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:10,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:48:10,946 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)] === [2024-06-14 11:48:10,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash -494725886, now seen corresponding path program 4 times [2024-06-14 11:48:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173901347] [2024-06-14 11:48:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:11,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:11,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173901347] [2024-06-14 11:48:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173901347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:11,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:11,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901075161] [2024-06-14 11:48:11,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:11,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:11,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:12,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:12,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:12,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:12,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:12,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:13,383 INFO L124 PetriNetUnfolderBase]: 7200/10197 cut-off events. [2024-06-14 11:48:13,383 INFO L125 PetriNetUnfolderBase]: For 53403/53461 co-relation queries the response was YES. [2024-06-14 11:48:13,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40198 conditions, 10197 events. 7200/10197 cut-off events. For 53403/53461 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 58066 event pairs, 3404 based on Foata normal form. 19/10184 useless extension candidates. Maximal degree in co-relation 40170. Up to 9624 conditions per place. [2024-06-14 11:48:13,453 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 73 selfloop transitions, 50 changer transitions 0/132 dead transitions. [2024-06-14 11:48:13,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1042 flow [2024-06-14 11:48:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 11:48:13,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 11:48:13,455 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 698 flow. Second operand 7 states and 193 transitions. [2024-06-14 11:48:13,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1042 flow [2024-06-14 11:48:13,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 132 transitions, 959 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:13,484 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 726 flow [2024-06-14 11:48:13,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2024-06-14 11:48:13,485 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-06-14 11:48:13,485 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 726 flow [2024-06-14 11:48:13,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:13,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:13,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:48:13,486 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:13,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1325648522, now seen corresponding path program 1 times [2024-06-14 11:48:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:13,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059941740] [2024-06-14 11:48:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:14,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:14,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059941740] [2024-06-14 11:48:14,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059941740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:14,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:14,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031811160] [2024-06-14 11:48:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:14,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:14,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:14,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:14,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:14,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:14,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:16,121 INFO L124 PetriNetUnfolderBase]: 8032/11613 cut-off events. [2024-06-14 11:48:16,121 INFO L125 PetriNetUnfolderBase]: For 62308/62310 co-relation queries the response was YES. [2024-06-14 11:48:16,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45091 conditions, 11613 events. 8032/11613 cut-off events. For 62308/62310 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 67280 event pairs, 3736 based on Foata normal form. 6/11539 useless extension candidates. Maximal degree in co-relation 45061. Up to 10879 conditions per place. [2024-06-14 11:48:16,204 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 114 selfloop transitions, 17 changer transitions 0/140 dead transitions. [2024-06-14 11:48:16,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 140 transitions, 1153 flow [2024-06-14 11:48:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:16,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 11:48:16,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:48:16,206 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 726 flow. Second operand 7 states and 189 transitions. [2024-06-14 11:48:16,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 140 transitions, 1153 flow [2024-06-14 11:48:16,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 140 transitions, 1012 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:16,259 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 707 flow [2024-06-14 11:48:16,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=707, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-06-14 11:48:16,260 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-14 11:48:16,260 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 707 flow [2024-06-14 11:48:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:16,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:16,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:48:16,260 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)] === [2024-06-14 11:48:16,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1527903674, now seen corresponding path program 1 times [2024-06-14 11:48:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294276713] [2024-06-14 11:48:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294276713] [2024-06-14 11:48:16,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294276713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:16,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:16,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:48:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051161420] [2024-06-14 11:48:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:48:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:48:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:48:17,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:17,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:17,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:18,418 INFO L124 PetriNetUnfolderBase]: 9059/12996 cut-off events. [2024-06-14 11:48:18,419 INFO L125 PetriNetUnfolderBase]: For 86467/86487 co-relation queries the response was YES. [2024-06-14 11:48:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53764 conditions, 12996 events. 9059/12996 cut-off events. For 86467/86487 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75404 event pairs, 4701 based on Foata normal form. 20/12864 useless extension candidates. Maximal degree in co-relation 53732. Up to 12368 conditions per place. [2024-06-14 11:48:18,521 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 103 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-14 11:48:18,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 126 transitions, 1013 flow [2024-06-14 11:48:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:48:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:48:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 11:48:18,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925925925925926 [2024-06-14 11:48:18,523 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 707 flow. Second operand 5 states and 133 transitions. [2024-06-14 11:48:18,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 126 transitions, 1013 flow [2024-06-14 11:48:18,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 126 transitions, 953 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:48:18,575 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 720 flow [2024-06-14 11:48:18,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2024-06-14 11:48:18,576 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-14 11:48:18,576 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 720 flow [2024-06-14 11:48:18,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:18,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:18,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:48:18,576 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:18,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -92666598, now seen corresponding path program 1 times [2024-06-14 11:48:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:18,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017603445] [2024-06-14 11:48:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017603445] [2024-06-14 11:48:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017603445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:19,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:19,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590800970] [2024-06-14 11:48:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:19,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:19,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 720 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:19,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:19,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:21,073 INFO L124 PetriNetUnfolderBase]: 9082/13211 cut-off events. [2024-06-14 11:48:21,073 INFO L125 PetriNetUnfolderBase]: For 101598/101618 co-relation queries the response was YES. [2024-06-14 11:48:21,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56958 conditions, 13211 events. 9082/13211 cut-off events. For 101598/101618 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 78232 event pairs, 4665 based on Foata normal form. 22/13203 useless extension candidates. Maximal degree in co-relation 56925. Up to 12332 conditions per place. [2024-06-14 11:48:21,175 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 108 selfloop transitions, 14 changer transitions 0/135 dead transitions. [2024-06-14 11:48:21,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1064 flow [2024-06-14 11:48:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:48:21,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-14 11:48:21,178 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 720 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:48:21,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1064 flow [2024-06-14 11:48:21,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 1021 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:21,252 INFO L231 Difference]: Finished difference. Result has 92 places, 116 transitions, 764 flow [2024-06-14 11:48:21,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=116} [2024-06-14 11:48:21,253 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 35 predicate places. [2024-06-14 11:48:21,253 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 116 transitions, 764 flow [2024-06-14 11:48:21,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:21,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:21,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:21,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:48:21,254 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:21,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash -2136348699, now seen corresponding path program 1 times [2024-06-14 11:48:21,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:21,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39571070] [2024-06-14 11:48:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:22,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:22,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39571070] [2024-06-14 11:48:22,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39571070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:22,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:22,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:22,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444803048] [2024-06-14 11:48:22,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:22,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:22,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:22,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:22,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 116 transitions, 764 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:22,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:22,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:22,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:24,633 INFO L124 PetriNetUnfolderBase]: 10479/14764 cut-off events. [2024-06-14 11:48:24,634 INFO L125 PetriNetUnfolderBase]: For 153845/154066 co-relation queries the response was YES. [2024-06-14 11:48:24,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71031 conditions, 14764 events. 10479/14764 cut-off events. For 153845/154066 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 86062 event pairs, 3699 based on Foata normal form. 47/14742 useless extension candidates. Maximal degree in co-relation 70997. Up to 13675 conditions per place. [2024-06-14 11:48:24,733 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 130 selfloop transitions, 41 changer transitions 0/182 dead transitions. [2024-06-14 11:48:24,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1468 flow [2024-06-14 11:48:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-14 11:48:24,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.522633744855967 [2024-06-14 11:48:24,735 INFO L175 Difference]: Start difference. First operand has 92 places, 116 transitions, 764 flow. Second operand 9 states and 254 transitions. [2024-06-14 11:48:24,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1468 flow [2024-06-14 11:48:24,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 182 transitions, 1411 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:48:24,784 INFO L231 Difference]: Finished difference. Result has 97 places, 120 transitions, 882 flow [2024-06-14 11:48:24,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=882, PETRI_PLACES=97, PETRI_TRANSITIONS=120} [2024-06-14 11:48:24,785 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-06-14 11:48:24,785 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 120 transitions, 882 flow [2024-06-14 11:48:24,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:24,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:24,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:24,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:48:24,785 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:24,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:24,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1536047103, now seen corresponding path program 2 times [2024-06-14 11:48:24,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:24,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520436395] [2024-06-14 11:48:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:24,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:25,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:25,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520436395] [2024-06-14 11:48:25,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520436395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:25,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:25,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:25,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303180425] [2024-06-14 11:48:25,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:25,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:26,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:26,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 120 transitions, 882 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:26,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:26,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:26,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:27,958 INFO L124 PetriNetUnfolderBase]: 10433/14726 cut-off events. [2024-06-14 11:48:27,958 INFO L125 PetriNetUnfolderBase]: For 173891/174089 co-relation queries the response was YES. [2024-06-14 11:48:28,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72751 conditions, 14726 events. 10433/14726 cut-off events. For 173891/174089 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 86025 event pairs, 4271 based on Foata normal form. 53/14716 useless extension candidates. Maximal degree in co-relation 72716. Up to 13833 conditions per place. [2024-06-14 11:48:28,070 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 122 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-14 11:48:28,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 169 transitions, 1370 flow [2024-06-14 11:48:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 11:48:28,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-14 11:48:28,073 INFO L175 Difference]: Start difference. First operand has 97 places, 120 transitions, 882 flow. Second operand 8 states and 223 transitions. [2024-06-14 11:48:28,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 169 transitions, 1370 flow [2024-06-14 11:48:28,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1297 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:28,158 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 893 flow [2024-06-14 11:48:28,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2024-06-14 11:48:28,159 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-14 11:48:28,159 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 893 flow [2024-06-14 11:48:28,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:28,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:28,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:48:28,160 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:28,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2018200569, now seen corresponding path program 3 times [2024-06-14 11:48:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:28,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223262523] [2024-06-14 11:48:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:28,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:29,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223262523] [2024-06-14 11:48:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223262523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:29,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:29,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:29,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108766681] [2024-06-14 11:48:29,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:29,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:29,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:29,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:29,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:29,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:29,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 893 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:29,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:29,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:29,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:31,349 INFO L124 PetriNetUnfolderBase]: 10547/14893 cut-off events. [2024-06-14 11:48:31,350 INFO L125 PetriNetUnfolderBase]: For 192487/192679 co-relation queries the response was YES. [2024-06-14 11:48:31,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74848 conditions, 14893 events. 10547/14893 cut-off events. For 192487/192679 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 87033 event pairs, 4459 based on Foata normal form. 76/14898 useless extension candidates. Maximal degree in co-relation 74811. Up to 13920 conditions per place. [2024-06-14 11:48:31,473 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 100 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-14 11:48:31,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1395 flow [2024-06-14 11:48:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-14 11:48:31,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 11:48:31,476 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 893 flow. Second operand 8 states and 224 transitions. [2024-06-14 11:48:31,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1395 flow [2024-06-14 11:48:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 166 transitions, 1313 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:31,587 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 979 flow [2024-06-14 11:48:31,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-14 11:48:31,587 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-06-14 11:48:31,588 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 979 flow [2024-06-14 11:48:31,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:31,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:31,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:31,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:48:31,588 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)] === [2024-06-14 11:48:31,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash 923172223, now seen corresponding path program 1 times [2024-06-14 11:48:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:31,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883079474] [2024-06-14 11:48:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:31,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883079474] [2024-06-14 11:48:32,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883079474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:32,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:32,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:32,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084443807] [2024-06-14 11:48:32,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:32,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:32,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:32,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 979 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:32,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:32,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:32,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:34,894 INFO L124 PetriNetUnfolderBase]: 10984/15453 cut-off events. [2024-06-14 11:48:34,894 INFO L125 PetriNetUnfolderBase]: For 216650/216661 co-relation queries the response was YES. [2024-06-14 11:48:34,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77920 conditions, 15453 events. 10984/15453 cut-off events. For 216650/216661 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 88177 event pairs, 4697 based on Foata normal form. 14/15398 useless extension candidates. Maximal degree in co-relation 77882. Up to 14680 conditions per place. [2024-06-14 11:48:34,997 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 130 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-14 11:48:34,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1540 flow [2024-06-14 11:48:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 11:48:34,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 11:48:34,999 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 979 flow. Second operand 8 states and 215 transitions. [2024-06-14 11:48:34,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1540 flow [2024-06-14 11:48:35,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1408 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:35,107 INFO L231 Difference]: Finished difference. Result has 104 places, 129 transitions, 1022 flow [2024-06-14 11:48:35,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=104, PETRI_TRANSITIONS=129} [2024-06-14 11:48:35,107 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-14 11:48:35,108 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 129 transitions, 1022 flow [2024-06-14 11:48:35,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:35,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:35,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:35,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:48:35,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:35,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 551987941, now seen corresponding path program 1 times [2024-06-14 11:48:35,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:35,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956790090] [2024-06-14 11:48:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:35,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:35,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:35,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956790090] [2024-06-14 11:48:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956790090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:35,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:35,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930538294] [2024-06-14 11:48:35,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:35,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:35,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:35,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:36,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:36,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 129 transitions, 1022 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:36,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:36,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:36,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:37,966 INFO L124 PetriNetUnfolderBase]: 10937/15402 cut-off events. [2024-06-14 11:48:37,966 INFO L125 PetriNetUnfolderBase]: For 233779/233802 co-relation queries the response was YES. [2024-06-14 11:48:38,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79848 conditions, 15402 events. 10937/15402 cut-off events. For 233779/233802 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 87991 event pairs, 5139 based on Foata normal form. 23/15385 useless extension candidates. Maximal degree in co-relation 79808. Up to 14751 conditions per place. [2024-06-14 11:48:38,094 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 113 selfloop transitions, 35 changer transitions 0/162 dead transitions. [2024-06-14 11:48:38,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1562 flow [2024-06-14 11:48:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 11:48:38,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-14 11:48:38,096 INFO L175 Difference]: Start difference. First operand has 104 places, 129 transitions, 1022 flow. Second operand 6 states and 161 transitions. [2024-06-14 11:48:38,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1562 flow [2024-06-14 11:48:38,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 1450 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:38,208 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 1105 flow [2024-06-14 11:48:38,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1105, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-06-14 11:48:38,209 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-14 11:48:38,209 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 1105 flow [2024-06-14 11:48:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:38,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:38,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:38,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:48:38,210 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)] === [2024-06-14 11:48:38,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1298910243, now seen corresponding path program 4 times [2024-06-14 11:48:38,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:38,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181953615] [2024-06-14 11:48:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:38,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:39,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:39,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181953615] [2024-06-14 11:48:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181953615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:39,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:39,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:39,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257308175] [2024-06-14 11:48:39,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:39,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:39,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:39,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 11:48:39,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 1105 flow. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:39,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:39,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 11:48:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:41,675 INFO L124 PetriNetUnfolderBase]: 10655/15108 cut-off events. [2024-06-14 11:48:41,675 INFO L125 PetriNetUnfolderBase]: For 279279/279456 co-relation queries the response was YES. [2024-06-14 11:48:41,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83736 conditions, 15108 events. 10655/15108 cut-off events. For 279279/279456 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 88861 event pairs, 4706 based on Foata normal form. 62/15000 useless extension candidates. Maximal degree in co-relation 83695. Up to 14032 conditions per place. [2024-06-14 11:48:41,821 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 110 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-14 11:48:41,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1637 flow [2024-06-14 11:48:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 11:48:41,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-14 11:48:41,824 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 1105 flow. Second operand 8 states and 221 transitions. [2024-06-14 11:48:41,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1637 flow [2024-06-14 11:48:41,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1587 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 11:48:41,987 INFO L231 Difference]: Finished difference. Result has 111 places, 139 transitions, 1237 flow [2024-06-14 11:48:41,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1237, PETRI_PLACES=111, PETRI_TRANSITIONS=139} [2024-06-14 11:48:41,988 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-14 11:48:41,988 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 139 transitions, 1237 flow [2024-06-14 11:48:41,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:41,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:41,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:41,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:48:41,989 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)] === [2024-06-14 11:48:41,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1648532053, now seen corresponding path program 2 times [2024-06-14 11:48:41,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:41,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61914011] [2024-06-14 11:48:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:42,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:42,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61914011] [2024-06-14 11:48:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61914011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:42,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:42,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56675041] [2024-06-14 11:48:42,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:42,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:43,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 139 transitions, 1237 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:43,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:43,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:43,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:45,164 INFO L124 PetriNetUnfolderBase]: 11171/15730 cut-off events. [2024-06-14 11:48:45,165 INFO L125 PetriNetUnfolderBase]: For 304600/304621 co-relation queries the response was YES. [2024-06-14 11:48:45,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88116 conditions, 15730 events. 11171/15730 cut-off events. For 304600/304621 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 89720 event pairs, 4713 based on Foata normal form. 20/15677 useless extension candidates. Maximal degree in co-relation 88073. Up to 14918 conditions per place. [2024-06-14 11:48:45,318 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 138 selfloop transitions, 43 changer transitions 0/192 dead transitions. [2024-06-14 11:48:45,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 192 transitions, 1867 flow [2024-06-14 11:48:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 11:48:45,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 11:48:45,320 INFO L175 Difference]: Start difference. First operand has 111 places, 139 transitions, 1237 flow. Second operand 8 states and 211 transitions. [2024-06-14 11:48:45,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 192 transitions, 1867 flow [2024-06-14 11:48:45,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 192 transitions, 1715 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:45,513 INFO L231 Difference]: Finished difference. Result has 114 places, 150 transitions, 1331 flow [2024-06-14 11:48:45,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=114, PETRI_TRANSITIONS=150} [2024-06-14 11:48:45,514 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-14 11:48:45,514 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 150 transitions, 1331 flow [2024-06-14 11:48:45,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:45,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:45,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:48:45,515 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)] === [2024-06-14 11:48:45,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1535566971, now seen corresponding path program 3 times [2024-06-14 11:48:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:45,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458374214] [2024-06-14 11:48:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:45,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458374214] [2024-06-14 11:48:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458374214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:46,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:46,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:46,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452236684] [2024-06-14 11:48:46,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:46,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:46,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:46,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:46,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 150 transitions, 1331 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:46,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:46,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:48,681 INFO L124 PetriNetUnfolderBase]: 11207/15782 cut-off events. [2024-06-14 11:48:48,682 INFO L125 PetriNetUnfolderBase]: For 336246/336267 co-relation queries the response was YES. [2024-06-14 11:48:48,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91510 conditions, 15782 events. 11207/15782 cut-off events. For 336246/336267 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 90118 event pairs, 4392 based on Foata normal form. 20/15729 useless extension candidates. Maximal degree in co-relation 91465. Up to 14833 conditions per place. [2024-06-14 11:48:48,840 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 137 selfloop transitions, 54 changer transitions 0/202 dead transitions. [2024-06-14 11:48:48,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 202 transitions, 2109 flow [2024-06-14 11:48:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 11:48:48,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 11:48:48,842 INFO L175 Difference]: Start difference. First operand has 114 places, 150 transitions, 1331 flow. Second operand 8 states and 215 transitions. [2024-06-14 11:48:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 202 transitions, 2109 flow [2024-06-14 11:48:49,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 202 transitions, 1999 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:49,090 INFO L231 Difference]: Finished difference. Result has 119 places, 156 transitions, 1485 flow [2024-06-14 11:48:49,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=119, PETRI_TRANSITIONS=156} [2024-06-14 11:48:49,091 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-14 11:48:49,091 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 156 transitions, 1485 flow [2024-06-14 11:48:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:49,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:49,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:49,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:48:49,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:49,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1420630903, now seen corresponding path program 4 times [2024-06-14 11:48:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:49,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492700967] [2024-06-14 11:48:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:49,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:50,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:50,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492700967] [2024-06-14 11:48:50,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492700967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:50,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:50,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:48:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374258377] [2024-06-14 11:48:50,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:50,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:48:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:48:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:48:50,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:50,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 156 transitions, 1485 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:50,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:50,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:50,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:52,379 INFO L124 PetriNetUnfolderBase]: 11192/15761 cut-off events. [2024-06-14 11:48:52,379 INFO L125 PetriNetUnfolderBase]: For 366430/366451 co-relation queries the response was YES. [2024-06-14 11:48:52,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92464 conditions, 15761 events. 11192/15761 cut-off events. For 366430/366451 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 89973 event pairs, 4694 based on Foata normal form. 20/15708 useless extension candidates. Maximal degree in co-relation 92418. Up to 14949 conditions per place. [2024-06-14 11:48:52,555 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 145 selfloop transitions, 42 changer transitions 0/198 dead transitions. [2024-06-14 11:48:52,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 198 transitions, 1999 flow [2024-06-14 11:48:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 11:48:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 11:48:52,556 INFO L175 Difference]: Start difference. First operand has 119 places, 156 transitions, 1485 flow. Second operand 8 states and 212 transitions. [2024-06-14 11:48:52,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 198 transitions, 1999 flow [2024-06-14 11:48:52,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 198 transitions, 1841 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 11:48:52,909 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1421 flow [2024-06-14 11:48:52,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1421, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-14 11:48:52,910 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-14 11:48:52,910 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1421 flow [2024-06-14 11:48:52,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:52,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:52,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:52,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:48:52,911 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:52,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 563415781, now seen corresponding path program 2 times [2024-06-14 11:48:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:52,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125570334] [2024-06-14 11:48:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125570334] [2024-06-14 11:48:53,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125570334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:53,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:53,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:53,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326698317] [2024-06-14 11:48:53,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:53,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:53,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:53,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1421 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:53,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:53,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:53,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:55,774 INFO L124 PetriNetUnfolderBase]: 11074/15625 cut-off events. [2024-06-14 11:48:55,775 INFO L125 PetriNetUnfolderBase]: For 373025/373040 co-relation queries the response was YES. [2024-06-14 11:48:55,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90812 conditions, 15625 events. 11074/15625 cut-off events. For 373025/373040 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 89545 event pairs, 5133 based on Foata normal form. 15/15594 useless extension candidates. Maximal degree in co-relation 90764. Up to 14942 conditions per place. [2024-06-14 11:48:55,945 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 120 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-14 11:48:55,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 174 transitions, 1787 flow [2024-06-14 11:48:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:48:55,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 11:48:55,946 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1421 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:48:55,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 174 transitions, 1787 flow [2024-06-14 11:48:56,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 174 transitions, 1619 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 11:48:56,231 INFO L231 Difference]: Finished difference. Result has 120 places, 156 transitions, 1332 flow [2024-06-14 11:48:56,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1332, PETRI_PLACES=120, PETRI_TRANSITIONS=156} [2024-06-14 11:48:56,232 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 11:48:56,232 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 156 transitions, 1332 flow [2024-06-14 11:48:56,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:56,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:56,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:56,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:48:56,233 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:56,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 557707813, now seen corresponding path program 1 times [2024-06-14 11:48:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:56,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641770046] [2024-06-14 11:48:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:56,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:57,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:57,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641770046] [2024-06-14 11:48:57,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641770046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:57,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:57,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:48:57,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138114313] [2024-06-14 11:48:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:57,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:48:57,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:48:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:48:57,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:48:57,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 156 transitions, 1332 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:57,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:57,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:48:57,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:59,006 INFO L124 PetriNetUnfolderBase]: 10333/14723 cut-off events. [2024-06-14 11:48:59,007 INFO L125 PetriNetUnfolderBase]: For 341412/341420 co-relation queries the response was YES. [2024-06-14 11:48:59,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85469 conditions, 14723 events. 10333/14723 cut-off events. For 341412/341420 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84390 event pairs, 4392 based on Foata normal form. 6/14694 useless extension candidates. Maximal degree in co-relation 85422. Up to 14061 conditions per place. [2024-06-14 11:48:59,154 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 158 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-06-14 11:48:59,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 187 transitions, 1964 flow [2024-06-14 11:48:59,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:48:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:48:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 11:48:59,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-14 11:48:59,155 INFO L175 Difference]: Start difference. First operand has 120 places, 156 transitions, 1332 flow. Second operand 6 states and 158 transitions. [2024-06-14 11:48:59,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 187 transitions, 1964 flow [2024-06-14 11:48:59,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 187 transitions, 1863 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:59,491 INFO L231 Difference]: Finished difference. Result has 121 places, 164 transitions, 1406 flow [2024-06-14 11:48:59,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1406, PETRI_PLACES=121, PETRI_TRANSITIONS=164} [2024-06-14 11:48:59,492 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-14 11:48:59,492 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 164 transitions, 1406 flow [2024-06-14 11:48:59,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:59,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:59,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:48:59,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:48:59,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1450895623, now seen corresponding path program 2 times [2024-06-14 11:48:59,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:59,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289652394] [2024-06-14 11:48:59,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:00,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289652394] [2024-06-14 11:49:00,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289652394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:00,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:49:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92223256] [2024-06-14 11:49:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:00,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:49:00,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:49:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:49:00,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:00,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 164 transitions, 1406 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:00,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:00,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:00,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:02,172 INFO L124 PetriNetUnfolderBase]: 10326/14731 cut-off events. [2024-06-14 11:49:02,172 INFO L125 PetriNetUnfolderBase]: For 371316/371324 co-relation queries the response was YES. [2024-06-14 11:49:02,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88475 conditions, 14731 events. 10326/14731 cut-off events. For 371316/371324 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 84704 event pairs, 4411 based on Foata normal form. 6/14701 useless extension candidates. Maximal degree in co-relation 88427. Up to 14054 conditions per place. [2024-06-14 11:49:02,317 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 153 selfloop transitions, 21 changer transitions 0/182 dead transitions. [2024-06-14 11:49:02,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 182 transitions, 1810 flow [2024-06-14 11:49:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:49:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:49:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 11:49:02,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 11:49:02,318 INFO L175 Difference]: Start difference. First operand has 121 places, 164 transitions, 1406 flow. Second operand 6 states and 153 transitions. [2024-06-14 11:49:02,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 182 transitions, 1810 flow [2024-06-14 11:49:02,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 182 transitions, 1712 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-14 11:49:02,658 INFO L231 Difference]: Finished difference. Result has 125 places, 164 transitions, 1359 flow [2024-06-14 11:49:02,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1359, PETRI_PLACES=125, PETRI_TRANSITIONS=164} [2024-06-14 11:49:02,659 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2024-06-14 11:49:02,659 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 164 transitions, 1359 flow [2024-06-14 11:49:02,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:02,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:02,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:02,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:49:02,660 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)] === [2024-06-14 11:49:02,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1088033837, now seen corresponding path program 1 times [2024-06-14 11:49:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:02,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018441630] [2024-06-14 11:49:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:03,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:03,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018441630] [2024-06-14 11:49:03,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018441630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:03,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:03,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:49:03,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179988307] [2024-06-14 11:49:03,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:03,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:49:03,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:03,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:49:03,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:49:03,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:03,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 164 transitions, 1359 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:03,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:03,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:03,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:06,519 INFO L124 PetriNetUnfolderBase]: 11550/16292 cut-off events. [2024-06-14 11:49:06,520 INFO L125 PetriNetUnfolderBase]: For 484091/484096 co-relation queries the response was YES. [2024-06-14 11:49:06,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101513 conditions, 16292 events. 11550/16292 cut-off events. For 484091/484096 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 93422 event pairs, 4679 based on Foata normal form. 18/16178 useless extension candidates. Maximal degree in co-relation 101463. Up to 14825 conditions per place. [2024-06-14 11:49:06,641 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 143 selfloop transitions, 79 changer transitions 0/235 dead transitions. [2024-06-14 11:49:06,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 235 transitions, 2194 flow [2024-06-14 11:49:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:49:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:49:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-14 11:49:06,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082304526748971 [2024-06-14 11:49:06,643 INFO L175 Difference]: Start difference. First operand has 125 places, 164 transitions, 1359 flow. Second operand 9 states and 247 transitions. [2024-06-14 11:49:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 235 transitions, 2194 flow [2024-06-14 11:49:06,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 235 transitions, 2135 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:06,944 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1712 flow [2024-06-14 11:49:06,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1712, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-14 11:49:06,945 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-14 11:49:06,945 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1712 flow [2024-06-14 11:49:06,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:06,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:06,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:06,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:49:06,946 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)] === [2024-06-14 11:49:06,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:06,946 INFO L85 PathProgramCache]: Analyzing trace with hash 910156773, now seen corresponding path program 1 times [2024-06-14 11:49:06,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:06,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505508947] [2024-06-14 11:49:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:06,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:08,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:08,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505508947] [2024-06-14 11:49:08,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505508947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:08,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:08,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424581207] [2024-06-14 11:49:08,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:08,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:08,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1712 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:08,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:08,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:08,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:10,503 INFO L124 PetriNetUnfolderBase]: 11357/16074 cut-off events. [2024-06-14 11:49:10,504 INFO L125 PetriNetUnfolderBase]: For 509034/509099 co-relation queries the response was YES. [2024-06-14 11:49:10,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102409 conditions, 16074 events. 11357/16074 cut-off events. For 509034/509099 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 92608 event pairs, 4913 based on Foata normal form. 24/16050 useless extension candidates. Maximal degree in co-relation 102356. Up to 15280 conditions per place. [2024-06-14 11:49:10,646 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 156 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-14 11:49:10,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2444 flow [2024-06-14 11:49:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 11:49:10,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-14 11:49:10,648 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1712 flow. Second operand 7 states and 188 transitions. [2024-06-14 11:49:10,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2444 flow [2024-06-14 11:49:11,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 220 transitions, 2286 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 11:49:11,051 INFO L231 Difference]: Finished difference. Result has 134 places, 188 transitions, 1797 flow [2024-06-14 11:49:11,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1797, PETRI_PLACES=134, PETRI_TRANSITIONS=188} [2024-06-14 11:49:11,051 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-14 11:49:11,051 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 188 transitions, 1797 flow [2024-06-14 11:49:11,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:11,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:11,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:11,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:49:11,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:49:11,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 92240053, now seen corresponding path program 2 times [2024-06-14 11:49:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:11,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845378780] [2024-06-14 11:49:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845378780] [2024-06-14 11:49:12,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845378780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:12,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:12,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:49:12,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58830865] [2024-06-14 11:49:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:49:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:49:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:49:12,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:12,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 188 transitions, 1797 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:12,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:12,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:12,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:14,982 INFO L124 PetriNetUnfolderBase]: 11824/16740 cut-off events. [2024-06-14 11:49:14,982 INFO L125 PetriNetUnfolderBase]: For 571582/571608 co-relation queries the response was YES. [2024-06-14 11:49:15,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110712 conditions, 16740 events. 11824/16740 cut-off events. For 571582/571608 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 96705 event pairs, 4698 based on Foata normal form. 18/16629 useless extension candidates. Maximal degree in co-relation 110658. Up to 15385 conditions per place. [2024-06-14 11:49:15,172 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 153 selfloop transitions, 86 changer transitions 0/252 dead transitions. [2024-06-14 11:49:15,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 252 transitions, 2612 flow [2024-06-14 11:49:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:49:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:49:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 11:49:15,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-14 11:49:15,174 INFO L175 Difference]: Start difference. First operand has 134 places, 188 transitions, 1797 flow. Second operand 9 states and 244 transitions. [2024-06-14 11:49:15,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 252 transitions, 2612 flow [2024-06-14 11:49:15,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 252 transitions, 2536 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 11:49:15,726 INFO L231 Difference]: Finished difference. Result has 142 places, 200 transitions, 2102 flow [2024-06-14 11:49:15,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2102, PETRI_PLACES=142, PETRI_TRANSITIONS=200} [2024-06-14 11:49:15,727 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-06-14 11:49:15,727 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 200 transitions, 2102 flow [2024-06-14 11:49:15,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:15,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:15,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:15,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:49:15,728 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)] === [2024-06-14 11:49:15,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1818587715, now seen corresponding path program 3 times [2024-06-14 11:49:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484742521] [2024-06-14 11:49:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:16,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:16,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484742521] [2024-06-14 11:49:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484742521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:49:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856246416] [2024-06-14 11:49:16,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:16,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:49:16,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:49:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:49:17,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:17,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 200 transitions, 2102 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:17,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:17,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:17,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:19,971 INFO L124 PetriNetUnfolderBase]: 12025/17059 cut-off events. [2024-06-14 11:49:19,971 INFO L125 PetriNetUnfolderBase]: For 629616/629658 co-relation queries the response was YES. [2024-06-14 11:49:20,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116182 conditions, 17059 events. 12025/17059 cut-off events. For 629616/629658 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 99186 event pairs, 4344 based on Foata normal form. 18/16940 useless extension candidates. Maximal degree in co-relation 116124. Up to 14715 conditions per place. [2024-06-14 11:49:20,158 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 142 selfloop transitions, 106 changer transitions 0/261 dead transitions. [2024-06-14 11:49:20,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 261 transitions, 3086 flow [2024-06-14 11:49:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:49:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:49:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-14 11:49:20,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-14 11:49:20,160 INFO L175 Difference]: Start difference. First operand has 142 places, 200 transitions, 2102 flow. Second operand 9 states and 246 transitions. [2024-06-14 11:49:20,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 261 transitions, 3086 flow [2024-06-14 11:49:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 261 transitions, 2935 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 11:49:20,777 INFO L231 Difference]: Finished difference. Result has 149 places, 206 transitions, 2407 flow [2024-06-14 11:49:20,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1951, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2407, PETRI_PLACES=149, PETRI_TRANSITIONS=206} [2024-06-14 11:49:20,779 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 92 predicate places. [2024-06-14 11:49:20,780 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 206 transitions, 2407 flow [2024-06-14 11:49:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:20,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:20,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:20,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:49:20,780 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)] === [2024-06-14 11:49:20,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1089886521, now seen corresponding path program 4 times [2024-06-14 11:49:20,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:20,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431744752] [2024-06-14 11:49:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:20,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431744752] [2024-06-14 11:49:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431744752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:22,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:22,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:49:22,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076126060] [2024-06-14 11:49:22,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:22,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:49:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:49:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:49:22,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:22,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 206 transitions, 2407 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:22,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:22,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:22,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:25,097 INFO L124 PetriNetUnfolderBase]: 11969/16995 cut-off events. [2024-06-14 11:49:25,098 INFO L125 PetriNetUnfolderBase]: For 657183/657209 co-relation queries the response was YES. [2024-06-14 11:49:25,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115983 conditions, 16995 events. 11969/16995 cut-off events. For 657183/657209 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 98773 event pairs, 4725 based on Foata normal form. 18/16884 useless extension candidates. Maximal degree in co-relation 115923. Up to 15608 conditions per place. [2024-06-14 11:49:25,294 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 160 selfloop transitions, 84 changer transitions 0/257 dead transitions. [2024-06-14 11:49:25,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 257 transitions, 3035 flow [2024-06-14 11:49:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:49:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:49:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 11:49:25,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-14 11:49:25,312 INFO L175 Difference]: Start difference. First operand has 149 places, 206 transitions, 2407 flow. Second operand 9 states and 244 transitions. [2024-06-14 11:49:25,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 257 transitions, 3035 flow [2024-06-14 11:49:26,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 2865 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:26,020 INFO L231 Difference]: Finished difference. Result has 152 places, 205 transitions, 2368 flow [2024-06-14 11:49:26,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2193, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2368, PETRI_PLACES=152, PETRI_TRANSITIONS=205} [2024-06-14 11:49:26,022 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-14 11:49:26,022 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 205 transitions, 2368 flow [2024-06-14 11:49:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:26,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:26,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:26,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:49:26,023 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)] === [2024-06-14 11:49:26,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:26,023 INFO L85 PathProgramCache]: Analyzing trace with hash 286021437, now seen corresponding path program 2 times [2024-06-14 11:49:26,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:26,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419801052] [2024-06-14 11:49:26,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:27,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419801052] [2024-06-14 11:49:27,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419801052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:27,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974441687] [2024-06-14 11:49:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:27,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:27,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:27,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 205 transitions, 2368 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:27,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:27,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:27,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:29,772 INFO L124 PetriNetUnfolderBase]: 11760/16729 cut-off events. [2024-06-14 11:49:29,772 INFO L125 PetriNetUnfolderBase]: For 661696/661753 co-relation queries the response was YES. [2024-06-14 11:49:29,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113858 conditions, 16729 events. 11760/16729 cut-off events. For 661696/661753 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97609 event pairs, 4957 based on Foata normal form. 25/16677 useless extension candidates. Maximal degree in co-relation 113796. Up to 15860 conditions per place. [2024-06-14 11:49:29,956 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 168 selfloop transitions, 49 changer transitions 0/236 dead transitions. [2024-06-14 11:49:29,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 236 transitions, 3070 flow [2024-06-14 11:49:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:49:29,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-14 11:49:29,958 INFO L175 Difference]: Start difference. First operand has 152 places, 205 transitions, 2368 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:49:29,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 236 transitions, 3070 flow [2024-06-14 11:49:30,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 236 transitions, 2792 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:30,526 INFO L231 Difference]: Finished difference. Result has 151 places, 209 transitions, 2271 flow [2024-06-14 11:49:30,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2271, PETRI_PLACES=151, PETRI_TRANSITIONS=209} [2024-06-14 11:49:30,527 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-14 11:49:30,527 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 209 transitions, 2271 flow [2024-06-14 11:49:30,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:30,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:30,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:49:30,527 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)] === [2024-06-14 11:49:30,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash 286437147, now seen corresponding path program 3 times [2024-06-14 11:49:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730846432] [2024-06-14 11:49:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:31,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:31,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730846432] [2024-06-14 11:49:31,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730846432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:31,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:31,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:31,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368167894] [2024-06-14 11:49:31,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:31,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:31,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:31,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:31,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 209 transitions, 2271 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:31,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:31,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:31,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:34,520 INFO L124 PetriNetUnfolderBase]: 11732/16677 cut-off events. [2024-06-14 11:49:34,521 INFO L125 PetriNetUnfolderBase]: For 683335/683394 co-relation queries the response was YES. [2024-06-14 11:49:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113489 conditions, 16677 events. 11732/16677 cut-off events. For 683335/683394 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 97016 event pairs, 4953 based on Foata normal form. 39/16624 useless extension candidates. Maximal degree in co-relation 113428. Up to 15840 conditions per place. [2024-06-14 11:49:34,719 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 164 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-14 11:49:34,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 233 transitions, 2771 flow [2024-06-14 11:49:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:49:34,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 11:49:34,721 INFO L175 Difference]: Start difference. First operand has 151 places, 209 transitions, 2271 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:49:34,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 233 transitions, 2771 flow [2024-06-14 11:49:35,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 233 transitions, 2562 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:35,342 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2171 flow [2024-06-14 11:49:35,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2171, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-14 11:49:35,342 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-14 11:49:35,343 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2171 flow [2024-06-14 11:49:35,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:35,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:35,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:35,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:49:35,343 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)] === [2024-06-14 11:49:35,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash 109069593, now seen corresponding path program 1 times [2024-06-14 11:49:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:35,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650464485] [2024-06-14 11:49:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:35,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:36,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650464485] [2024-06-14 11:49:36,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650464485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:36,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:36,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:36,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612442105] [2024-06-14 11:49:36,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:36,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:36,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:36,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:36,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:36,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:36,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:39,303 INFO L124 PetriNetUnfolderBase]: 11105/15959 cut-off events. [2024-06-14 11:49:39,303 INFO L125 PetriNetUnfolderBase]: For 612386/612388 co-relation queries the response was YES. [2024-06-14 11:49:39,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106722 conditions, 15959 events. 11105/15959 cut-off events. For 612386/612388 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93436 event pairs, 4330 based on Foata normal form. 2/15917 useless extension candidates. Maximal degree in co-relation 106660. Up to 15215 conditions per place. [2024-06-14 11:49:39,492 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 215 selfloop transitions, 18 changer transitions 0/241 dead transitions. [2024-06-14 11:49:39,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 241 transitions, 2803 flow [2024-06-14 11:49:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:49:39,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-14 11:49:39,493 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2171 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:49:39,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 241 transitions, 2803 flow [2024-06-14 11:49:40,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 241 transitions, 2692 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:40,316 INFO L231 Difference]: Finished difference. Result has 154 places, 213 transitions, 2191 flow [2024-06-14 11:49:40,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2191, PETRI_PLACES=154, PETRI_TRANSITIONS=213} [2024-06-14 11:49:40,316 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 97 predicate places. [2024-06-14 11:49:40,316 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 213 transitions, 2191 flow [2024-06-14 11:49:40,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:40,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:40,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:40,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:49:40,317 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)] === [2024-06-14 11:49:40,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash 489196509, now seen corresponding path program 2 times [2024-06-14 11:49:40,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:40,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003055309] [2024-06-14 11:49:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:41,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:41,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003055309] [2024-06-14 11:49:41,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003055309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:41,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:41,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:41,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130590998] [2024-06-14 11:49:41,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:41,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:41,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:41,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:41,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:41,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:41,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 213 transitions, 2191 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:41,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:41,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:41,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:43,983 INFO L124 PetriNetUnfolderBase]: 11121/15981 cut-off events. [2024-06-14 11:49:43,983 INFO L125 PetriNetUnfolderBase]: For 650680/650685 co-relation queries the response was YES. [2024-06-14 11:49:44,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109793 conditions, 15981 events. 11121/15981 cut-off events. For 650680/650685 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 93594 event pairs, 4334 based on Foata normal form. 4/15945 useless extension candidates. Maximal degree in co-relation 109730. Up to 15189 conditions per place. [2024-06-14 11:49:44,154 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 205 selfloop transitions, 35 changer transitions 0/248 dead transitions. [2024-06-14 11:49:44,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 3053 flow [2024-06-14 11:49:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 11:49:44,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-14 11:49:44,156 INFO L175 Difference]: Start difference. First operand has 154 places, 213 transitions, 2191 flow. Second operand 7 states and 181 transitions. [2024-06-14 11:49:44,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 3053 flow [2024-06-14 11:49:45,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 248 transitions, 2952 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:45,064 INFO L231 Difference]: Finished difference. Result has 156 places, 221 transitions, 2349 flow [2024-06-14 11:49:45,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=156, PETRI_TRANSITIONS=221} [2024-06-14 11:49:45,064 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 99 predicate places. [2024-06-14 11:49:45,064 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 221 transitions, 2349 flow [2024-06-14 11:49:45,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:45,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:45,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:45,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:49:45,065 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)] === [2024-06-14 11:49:45,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:45,065 INFO L85 PathProgramCache]: Analyzing trace with hash 109074429, now seen corresponding path program 1 times [2024-06-14 11:49:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:45,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888312926] [2024-06-14 11:49:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:46,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:46,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888312926] [2024-06-14 11:49:46,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888312926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:46,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:46,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:46,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012231457] [2024-06-14 11:49:46,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:46,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:46,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:46,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 221 transitions, 2349 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:46,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:46,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:46,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:48,627 INFO L124 PetriNetUnfolderBase]: 11153/16019 cut-off events. [2024-06-14 11:49:48,627 INFO L125 PetriNetUnfolderBase]: For 700315/700320 co-relation queries the response was YES. [2024-06-14 11:49:48,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113246 conditions, 16019 events. 11153/16019 cut-off events. For 700315/700320 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 93607 event pairs, 4303 based on Foata normal form. 4/15980 useless extension candidates. Maximal degree in co-relation 113182. Up to 15205 conditions per place. [2024-06-14 11:49:49,037 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 220 selfloop transitions, 31 changer transitions 0/259 dead transitions. [2024-06-14 11:49:49,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 259 transitions, 3231 flow [2024-06-14 11:49:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:49:49,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 11:49:49,039 INFO L175 Difference]: Start difference. First operand has 156 places, 221 transitions, 2349 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:49:49,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 259 transitions, 3231 flow [2024-06-14 11:49:49,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3125 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 11:49:49,605 INFO L231 Difference]: Finished difference. Result has 160 places, 229 transitions, 2482 flow [2024-06-14 11:49:49,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2482, PETRI_PLACES=160, PETRI_TRANSITIONS=229} [2024-06-14 11:49:49,606 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 103 predicate places. [2024-06-14 11:49:49,606 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 229 transitions, 2482 flow [2024-06-14 11:49:49,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:49,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:49,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:49,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:49:49,607 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:49:49,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:49,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2028329913, now seen corresponding path program 2 times [2024-06-14 11:49:49,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:49,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885324885] [2024-06-14 11:49:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:49,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:50,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:50,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885324885] [2024-06-14 11:49:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885324885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:50,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:50,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:50,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440872911] [2024-06-14 11:49:50,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:50,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:50,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:50,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:50,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:50,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 229 transitions, 2482 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:50,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:50,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:50,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:53,549 INFO L124 PetriNetUnfolderBase]: 11185/16069 cut-off events. [2024-06-14 11:49:53,549 INFO L125 PetriNetUnfolderBase]: For 744392/744400 co-relation queries the response was YES. [2024-06-14 11:49:53,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116724 conditions, 16069 events. 11185/16069 cut-off events. For 744392/744400 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 93939 event pairs, 4278 based on Foata normal form. 8/16034 useless extension candidates. Maximal degree in co-relation 116658. Up to 15234 conditions per place. [2024-06-14 11:49:53,702 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 215 selfloop transitions, 36 changer transitions 0/259 dead transitions. [2024-06-14 11:49:53,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 259 transitions, 3284 flow [2024-06-14 11:49:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:49:53,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-14 11:49:53,704 INFO L175 Difference]: Start difference. First operand has 160 places, 229 transitions, 2482 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:49:53,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 259 transitions, 3284 flow [2024-06-14 11:49:54,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 259 transitions, 3178 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-14 11:49:54,485 INFO L231 Difference]: Finished difference. Result has 164 places, 233 transitions, 2545 flow [2024-06-14 11:49:54,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2545, PETRI_PLACES=164, PETRI_TRANSITIONS=233} [2024-06-14 11:49:54,485 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 107 predicate places. [2024-06-14 11:49:54,485 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 233 transitions, 2545 flow [2024-06-14 11:49:54,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:54,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:54,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:54,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:49:54,486 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:49:54,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:54,486 INFO L85 PathProgramCache]: Analyzing trace with hash 493838325, now seen corresponding path program 3 times [2024-06-14 11:49:54,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:54,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788066864] [2024-06-14 11:49:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:54,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788066864] [2024-06-14 11:49:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788066864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:55,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:55,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:55,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861163176] [2024-06-14 11:49:55,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:55,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:55,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:49:55,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 233 transitions, 2545 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:55,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:55,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:49:55,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:58,788 INFO L124 PetriNetUnfolderBase]: 11171/16051 cut-off events. [2024-06-14 11:49:58,788 INFO L125 PetriNetUnfolderBase]: For 774097/774105 co-relation queries the response was YES. [2024-06-14 11:49:58,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117413 conditions, 16051 events. 11171/16051 cut-off events. For 774097/774105 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 93793 event pairs, 4276 based on Foata normal form. 8/16016 useless extension candidates. Maximal degree in co-relation 117345. Up to 15222 conditions per place. [2024-06-14 11:49:58,946 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 215 selfloop transitions, 35 changer transitions 0/258 dead transitions. [2024-06-14 11:49:58,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 258 transitions, 3119 flow [2024-06-14 11:49:58,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:49:58,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-14 11:49:58,951 INFO L175 Difference]: Start difference. First operand has 164 places, 233 transitions, 2545 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:49:58,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 258 transitions, 3119 flow [2024-06-14 11:49:59,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 258 transitions, 2939 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 11:49:59,833 INFO L231 Difference]: Finished difference. Result has 167 places, 233 transitions, 2444 flow [2024-06-14 11:49:59,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2444, PETRI_PLACES=167, PETRI_TRANSITIONS=233} [2024-06-14 11:49:59,834 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 110 predicate places. [2024-06-14 11:49:59,834 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 233 transitions, 2444 flow [2024-06-14 11:49:59,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:59,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:59,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:49:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:49:59,835 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:49:59,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash 286205763, now seen corresponding path program 3 times [2024-06-14 11:49:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:59,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633822903] [2024-06-14 11:49:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633822903] [2024-06-14 11:50:00,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633822903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:00,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:00,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66744453] [2024-06-14 11:50:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:00,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:00,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:01,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 11:50:01,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 233 transitions, 2444 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:01,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:01,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 11:50:01,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand