./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006.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/mix006.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/mix006.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix006.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 11:50:06,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:50:06,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:50:06,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:50:06,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:50:06,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:50:06,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:50:06,191 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:50:06,191 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:50:06,195 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:50:06,195 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:50:06,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:50:06,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:50:06,197 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:50:06,197 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:50:06,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:50:06,198 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:50:06,198 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:50:06,198 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:50:06,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:50:06,198 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:50:06,199 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:50:06,199 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:50:06,199 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:50:06,199 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:50:06,200 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:50:06,200 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:50:06,200 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:50:06,201 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:50:06,201 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:50:06,202 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:50:06,202 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:50:06,202 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:50:06,202 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:50:06,202 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:50:06,203 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:50:06,203 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:50:06,203 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:50:06,203 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:50:06,203 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:50:06,203 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:50:06,204 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:50:06,204 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:50:06,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:50:06,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:50:06,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:50:06,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:50:06,430 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:50:06,430 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:50:06,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-06-14 11:50:07,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:50:07,713 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:50:07,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006.opt.i [2024-06-14 11:50:07,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/217553a69/7ca134c6e36149babd1ea8013bbdc586/FLAG86929264f [2024-06-14 11:50:07,748 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/217553a69/7ca134c6e36149babd1ea8013bbdc586 [2024-06-14 11:50:07,751 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:50:07,751 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:50:07,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix006.opt.yml/witness.yml [2024-06-14 11:50:07,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:50:07,925 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:50:07,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:50:07,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:50:07,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:50:07,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:50:07" (1/2) ... [2024-06-14 11:50:07,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644ad4df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:07, skipping insertion in model container [2024-06-14 11:50:07,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:50:07" (1/2) ... [2024-06-14 11:50:07,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76c9d8e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:50:07, skipping insertion in model container [2024-06-14 11:50:07,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:50:07" (2/2) ... [2024-06-14 11:50:07,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644ad4df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:50:07, skipping insertion in model container [2024-06-14 11:50:07,934 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:50:07" (2/2) ... [2024-06-14 11:50:07,934 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:50:08,031 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:50:08,032 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:50:08,032 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:50:08,032 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) [2024-06-14 11:50:08,032 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:50:08,032 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 11:50:08,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:50:08,397 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:50:08,408 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:50:08,515 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:50:08,549 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:50:08,549 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:50:08 WrapperNode [2024-06-14 11:50:08,549 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:50:08,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:50:08,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:50:08,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:50:08,557 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,586 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,619 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 149 [2024-06-14 11:50:08,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:50:08,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:50:08,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:50:08,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:50:08,629 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,630 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,644 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,660 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 11:50:08,665 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,665 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,676 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,684 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,686 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,692 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,695 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:50:08,699 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:50:08,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:50:08,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:50:08,700 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 11:50:08" (1/1) ... [2024-06-14 11:50:08,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:50:08,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:50:08,723 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 11:50:08,734 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 11:50:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:50:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:50:08,755 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:50:08,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:50:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:50:08,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:50:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:50:08,756 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:50:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:50:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:50:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:50:08,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:50:08,758 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 11:50:08,888 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:50:08,891 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:50:09,197 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:50:09,197 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:50:09,430 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:50:09,430 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:50:09,431 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:50:09 BoogieIcfgContainer [2024-06-14 11:50:09,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:50:09,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:50:09,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:50:09,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:50:09,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:50:07" (1/4) ... [2024-06-14 11:50:09,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59950450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:50:09, skipping insertion in model container [2024-06-14 11:50:09,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:50:07" (2/4) ... [2024-06-14 11:50:09,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59950450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:50:09, skipping insertion in model container [2024-06-14 11:50:09,437 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 11:50:08" (3/4) ... [2024-06-14 11:50:09,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59950450 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:50:09, skipping insertion in model container [2024-06-14 11:50:09,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:50:09" (4/4) ... [2024-06-14 11:50:09,439 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006.opt.i [2024-06-14 11:50:09,458 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:50:09,458 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:50:09,458 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:50:09,497 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:50:09,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:50:09,539 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 11:50:09,539 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:50:09,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:50:09,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 11:50:09,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 11:50:09,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:50:09,555 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;@1ff124c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:50:09,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:50:09,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:50:09,558 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:50:09,558 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:50:09,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:09,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:50:09,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:09,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:09,563 INFO L85 PathProgramCache]: Analyzing trace with hash -518097545, now seen corresponding path program 1 times [2024-06-14 11:50:09,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499966848] [2024-06-14 11:50:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:09,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:10,581 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 11:50:10,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:10,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499966848] [2024-06-14 11:50:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499966848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:10,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:50:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025137169] [2024-06-14 11:50:10,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:10,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:50:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:50:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:50:10,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-14 11:50:10,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:50:10,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:10,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-14 11:50:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:11,035 INFO L124 PetriNetUnfolderBase]: 1116/1777 cut-off events. [2024-06-14 11:50:11,035 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 11:50:11,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3530 conditions, 1777 events. 1116/1777 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8994 event pairs, 765 based on Foata normal form. 1/1708 useless extension candidates. Maximal degree in co-relation 3515. Up to 1676 conditions per place. [2024-06-14 11:50:11,052 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 11:50:11,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-14 11:50:11,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:50:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:50:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-14 11:50:11,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-14 11:50:11,064 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-14 11:50:11,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-14 11:50:11,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:11,070 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 11:50:11,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 11:50:11,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 11:50:11,075 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 11:50:11,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states 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 11:50:11,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:11,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:11,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:50:11,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:11,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash 324486806, now seen corresponding path program 1 times [2024-06-14 11:50:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963876368] [2024-06-14 11:50:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:11,641 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 11:50:11,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:11,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963876368] [2024-06-14 11:50:11,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963876368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:11,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:11,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:50:11,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847098381] [2024-06-14 11:50:11,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:11,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:50:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:50:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:50:11,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:50:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 11:50:11,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:11,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:50:11,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:11,990 INFO L124 PetriNetUnfolderBase]: 1280/1983 cut-off events. [2024-06-14 11:50:11,991 INFO L125 PetriNetUnfolderBase]: For 401/401 co-relation queries the response was YES. [2024-06-14 11:50:11,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4506 conditions, 1983 events. 1280/1983 cut-off events. For 401/401 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9834 event pairs, 750 based on Foata normal form. 3/1979 useless extension candidates. Maximal degree in co-relation 4491. Up to 1897 conditions per place. [2024-06-14 11:50:12,004 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 41 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 11:50:12,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 246 flow [2024-06-14 11:50:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:50:12,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:50:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-14 11:50:12,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-06-14 11:50:12,008 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 99 transitions. [2024-06-14 11:50:12,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 246 flow [2024-06-14 11:50:12,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:50:12,012 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 11:50:12,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 11:50:12,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 11:50:12,013 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 11:50:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 11:50:12,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:12,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:12,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:50:12,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:12,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1469157118, now seen corresponding path program 1 times [2024-06-14 11:50:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537995404] [2024-06-14 11:50:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:12,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:12,572 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 11:50:12,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:12,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537995404] [2024-06-14 11:50:12,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537995404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:12,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:12,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:50:12,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144900906] [2024-06-14 11:50:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:12,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:50:12,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:50:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:50:12,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:12,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 11:50:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:12,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:12,968 INFO L124 PetriNetUnfolderBase]: 1568/2407 cut-off events. [2024-06-14 11:50:12,968 INFO L125 PetriNetUnfolderBase]: For 1355/1355 co-relation queries the response was YES. [2024-06-14 11:50:12,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6042 conditions, 2407 events. 1568/2407 cut-off events. For 1355/1355 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11980 event pairs, 669 based on Foata normal form. 5/2407 useless extension candidates. Maximal degree in co-relation 6025. Up to 2248 conditions per place. [2024-06-14 11:50:12,980 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 11:50:12,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 402 flow [2024-06-14 11:50:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:50:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:50:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 11:50:12,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-14 11:50:12,985 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 125 transitions. [2024-06-14 11:50:12,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 402 flow [2024-06-14 11:50:12,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 388 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:50:12,988 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-14 11:50:12,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-14 11:50:12,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 11:50:12,990 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-14 11:50:12,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 11:50:12,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:12,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:12,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:50:12,991 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:12,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1184225795, now seen corresponding path program 1 times [2024-06-14 11:50:12,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:12,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002633564] [2024-06-14 11:50:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:13,682 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 11:50:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:13,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002633564] [2024-06-14 11:50:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002633564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:13,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:13,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:50:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393087750] [2024-06-14 11:50:13,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:50:13,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:13,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:50:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:50:13,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:13,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 11:50:13,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:13,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:13,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:14,093 INFO L124 PetriNetUnfolderBase]: 1580/2427 cut-off events. [2024-06-14 11:50:14,093 INFO L125 PetriNetUnfolderBase]: For 3211/3214 co-relation queries the response was YES. [2024-06-14 11:50:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 2427 events. 1580/2427 cut-off events. For 3211/3214 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12093 event pairs, 481 based on Foata normal form. 12/2434 useless extension candidates. Maximal degree in co-relation 7166. Up to 2216 conditions per place. [2024-06-14 11:50:14,107 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-14 11:50:14,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 505 flow [2024-06-14 11:50:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:14,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:50:14,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542635658914729 [2024-06-14 11:50:14,108 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:50:14,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 505 flow [2024-06-14 11:50:14,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 497 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 11:50:14,112 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-14 11:50:14,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-14 11:50:14,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-14 11:50:14,113 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-14 11:50:14,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 11:50:14,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:14,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:14,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:50:14,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:14,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1394666457, now seen corresponding path program 1 times [2024-06-14 11:50:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:14,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721786832] [2024-06-14 11:50:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:14,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:14,701 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 11:50:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:14,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721786832] [2024-06-14 11:50:14,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721786832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:14,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:14,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:50:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284600853] [2024-06-14 11:50:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:14,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:50:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:50:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:50:14,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:14,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 11:50:14,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:14,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:15,168 INFO L124 PetriNetUnfolderBase]: 1368/2160 cut-off events. [2024-06-14 11:50:15,168 INFO L125 PetriNetUnfolderBase]: For 4054/4054 co-relation queries the response was YES. [2024-06-14 11:50:15,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6932 conditions, 2160 events. 1368/2160 cut-off events. For 4054/4054 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10976 event pairs, 562 based on Foata normal form. 2/2134 useless extension candidates. Maximal degree in co-relation 6909. Up to 2036 conditions per place. [2024-06-14 11:50:15,182 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 50 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-14 11:50:15,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 439 flow [2024-06-14 11:50:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:50:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:50:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-14 11:50:15,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-14 11:50:15,184 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 101 transitions. [2024-06-14 11:50:15,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 439 flow [2024-06-14 11:50:15,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:15,188 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-14 11:50:15,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 11:50:15,189 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 11:50:15,189 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-14 11:50:15,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 11:50:15,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:15,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:15,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:50:15,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:15,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:15,191 INFO L85 PathProgramCache]: Analyzing trace with hash -285879607, now seen corresponding path program 1 times [2024-06-14 11:50:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512258174] [2024-06-14 11:50:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:15,824 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 11:50:15,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512258174] [2024-06-14 11:50:15,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512258174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:15,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:15,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:15,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007909650] [2024-06-14 11:50:15,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:15,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:15,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:15,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:15,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:16,399 INFO L124 PetriNetUnfolderBase]: 1358/2172 cut-off events. [2024-06-14 11:50:16,399 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-14 11:50:16,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6940 conditions, 2172 events. 1358/2172 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11074 event pairs, 526 based on Foata normal form. 4/2166 useless extension candidates. Maximal degree in co-relation 6915. Up to 2004 conditions per place. [2024-06-14 11:50:16,413 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-14 11:50:16,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 459 flow [2024-06-14 11:50:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:50:16,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 11:50:16,414 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:50:16,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 459 flow [2024-06-14 11:50:16,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 437 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:16,419 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 301 flow [2024-06-14 11:50:16,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-14 11:50:16,422 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 11:50:16,422 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 301 flow [2024-06-14 11:50:16,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:16,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:16,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:16,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:50:16,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:16,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1109222620, now seen corresponding path program 1 times [2024-06-14 11:50:16,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:16,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399330573] [2024-06-14 11:50:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:16,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:17,127 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 11:50:17,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:17,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399330573] [2024-06-14 11:50:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399330573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:17,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058362427] [2024-06-14 11:50:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:17,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:17,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:17,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 301 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:17,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:17,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:17,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:17,682 INFO L124 PetriNetUnfolderBase]: 1571/2395 cut-off events. [2024-06-14 11:50:17,682 INFO L125 PetriNetUnfolderBase]: For 7263/7269 co-relation queries the response was YES. [2024-06-14 11:50:17,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8370 conditions, 2395 events. 1571/2395 cut-off events. For 7263/7269 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11665 event pairs, 635 based on Foata normal form. 8/2400 useless extension candidates. Maximal degree in co-relation 8345. Up to 2253 conditions per place. [2024-06-14 11:50:17,701 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-14 11:50:17,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 545 flow [2024-06-14 11:50:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 11:50:17,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 11:50:17,703 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 301 flow. Second operand 6 states and 123 transitions. [2024-06-14 11:50:17,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 545 flow [2024-06-14 11:50:17,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 515 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:17,709 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-14 11:50:17,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-14 11:50:17,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 11:50:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-14 11:50:17,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:17,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:17,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:17,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:50:17,712 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:17,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash -244634170, now seen corresponding path program 2 times [2024-06-14 11:50:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:17,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229036789] [2024-06-14 11:50:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:17,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229036789] [2024-06-14 11:50:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229036789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:18,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:18,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:18,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555116843] [2024-06-14 11:50:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:18,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:18,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:18,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:18,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:18,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:18,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:18,968 INFO L124 PetriNetUnfolderBase]: 1559/2368 cut-off events. [2024-06-14 11:50:18,968 INFO L125 PetriNetUnfolderBase]: For 8685/8689 co-relation queries the response was YES. [2024-06-14 11:50:18,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8539 conditions, 2368 events. 1559/2368 cut-off events. For 8685/8689 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11494 event pairs, 649 based on Foata normal form. 3/2364 useless extension candidates. Maximal degree in co-relation 8513. Up to 2237 conditions per place. [2024-06-14 11:50:18,981 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 49 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2024-06-14 11:50:18,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 519 flow [2024-06-14 11:50:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:18,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:18,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 11:50:18,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-14 11:50:18,983 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 6 states and 119 transitions. [2024-06-14 11:50:18,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 519 flow [2024-06-14 11:50:18,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 490 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:18,988 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 362 flow [2024-06-14 11:50:18,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-14 11:50:18,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 11:50:18,988 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 362 flow [2024-06-14 11:50:18,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:18,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:18,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:18,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:50:18,989 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:18,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 983751498, now seen corresponding path program 1 times [2024-06-14 11:50:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147699956] [2024-06-14 11:50:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:18,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:19,678 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 11:50:19,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147699956] [2024-06-14 11:50:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147699956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:19,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:19,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371703732] [2024-06-14 11:50:19,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:19,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:19,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:19,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:19,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 362 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:19,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:19,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:19,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:20,373 INFO L124 PetriNetUnfolderBase]: 1733/2650 cut-off events. [2024-06-14 11:50:20,374 INFO L125 PetriNetUnfolderBase]: For 11542/11542 co-relation queries the response was YES. [2024-06-14 11:50:20,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9926 conditions, 2650 events. 1733/2650 cut-off events. For 11542/11542 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13138 event pairs, 546 based on Foata normal form. 8/2652 useless extension candidates. Maximal degree in co-relation 9899. Up to 2237 conditions per place. [2024-06-14 11:50:20,387 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 80 selfloop transitions, 39 changer transitions 0/124 dead transitions. [2024-06-14 11:50:20,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 124 transitions, 1001 flow [2024-06-14 11:50:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:20,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 11:50:20,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-06-14 11:50:20,389 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 362 flow. Second operand 8 states and 170 transitions. [2024-06-14 11:50:20,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 124 transitions, 1001 flow [2024-06-14 11:50:20,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 124 transitions, 875 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:20,400 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 583 flow [2024-06-14 11:50:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2024-06-14 11:50:20,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-14 11:50:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 583 flow [2024-06-14 11:50:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:20,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:50:20,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:20,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -26161522, now seen corresponding path program 2 times [2024-06-14 11:50:20,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551694869] [2024-06-14 11:50:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:21,194 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 11:50:21,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:21,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551694869] [2024-06-14 11:50:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551694869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:21,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:21,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:21,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757489027] [2024-06-14 11:50:21,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:21,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:21,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:21,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:21,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:21,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:21,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:21,913 INFO L124 PetriNetUnfolderBase]: 1805/2770 cut-off events. [2024-06-14 11:50:21,913 INFO L125 PetriNetUnfolderBase]: For 15038/15040 co-relation queries the response was YES. [2024-06-14 11:50:21,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11387 conditions, 2770 events. 1805/2770 cut-off events. For 15038/15040 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13792 event pairs, 550 based on Foata normal form. 12/2776 useless extension candidates. Maximal degree in co-relation 11356. Up to 2285 conditions per place. [2024-06-14 11:50:21,953 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 66 selfloop transitions, 48 changer transitions 0/119 dead transitions. [2024-06-14 11:50:21,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 1007 flow [2024-06-14 11:50:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 11:50:21,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-14 11:50:21,955 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 583 flow. Second operand 7 states and 146 transitions. [2024-06-14 11:50:21,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 1007 flow [2024-06-14 11:50:21,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 979 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 11:50:21,969 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 736 flow [2024-06-14 11:50:21,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2024-06-14 11:50:21,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 11:50:21,971 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 736 flow [2024-06-14 11:50:21,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:21,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:21,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:21,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:50:21,972 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:21,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -216489854, now seen corresponding path program 3 times [2024-06-14 11:50:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096653646] [2024-06-14 11:50:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:22,718 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 11:50:22,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:22,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096653646] [2024-06-14 11:50:22,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096653646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:22,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:22,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:22,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507474495] [2024-06-14 11:50:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:22,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:22,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:22,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:22,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:22,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:22,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:22,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:23,416 INFO L124 PetriNetUnfolderBase]: 1841/2819 cut-off events. [2024-06-14 11:50:23,417 INFO L125 PetriNetUnfolderBase]: For 18346/18352 co-relation queries the response was YES. [2024-06-14 11:50:23,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12393 conditions, 2819 events. 1841/2819 cut-off events. For 18346/18352 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 14033 event pairs, 563 based on Foata normal form. 7/2812 useless extension candidates. Maximal degree in co-relation 12360. Up to 2301 conditions per place. [2024-06-14 11:50:23,436 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 60 changer transitions 0/128 dead transitions. [2024-06-14 11:50:23,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 1272 flow [2024-06-14 11:50:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-14 11:50:23,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-14 11:50:23,438 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 736 flow. Second operand 7 states and 146 transitions. [2024-06-14 11:50:23,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 1272 flow [2024-06-14 11:50:23,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 1156 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:23,455 INFO L231 Difference]: Finished difference. Result has 78 places, 100 transitions, 884 flow [2024-06-14 11:50:23,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=78, PETRI_TRANSITIONS=100} [2024-06-14 11:50:23,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 11:50:23,456 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 100 transitions, 884 flow [2024-06-14 11:50:23,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:23,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:23,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:23,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:50:23,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:23,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:23,457 INFO L85 PathProgramCache]: Analyzing trace with hash -244201994, now seen corresponding path program 4 times [2024-06-14 11:50:23,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:23,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116192887] [2024-06-14 11:50:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:23,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:24,139 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 11:50:24,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116192887] [2024-06-14 11:50:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116192887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:24,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:24,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:24,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014679595] [2024-06-14 11:50:24,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:24,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:24,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 884 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:24,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:24,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:24,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:24,843 INFO L124 PetriNetUnfolderBase]: 1825/2794 cut-off events. [2024-06-14 11:50:24,843 INFO L125 PetriNetUnfolderBase]: For 18541/18547 co-relation queries the response was YES. [2024-06-14 11:50:24,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12208 conditions, 2794 events. 1825/2794 cut-off events. For 18541/18547 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13865 event pairs, 572 based on Foata normal form. 7/2788 useless extension candidates. Maximal degree in co-relation 12174. Up to 2294 conditions per place. [2024-06-14 11:50:24,888 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 58 changer transitions 0/126 dead transitions. [2024-06-14 11:50:24,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 126 transitions, 1246 flow [2024-06-14 11:50:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 11:50:24,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-14 11:50:24,890 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 884 flow. Second operand 7 states and 145 transitions. [2024-06-14 11:50:24,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 126 transitions, 1246 flow [2024-06-14 11:50:24,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 126 transitions, 1150 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:24,909 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 914 flow [2024-06-14 11:50:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2024-06-14 11:50:24,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-14 11:50:24,910 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 914 flow [2024-06-14 11:50:24,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 11:50:24,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:24,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:50:24,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:24,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:24,911 INFO L85 PathProgramCache]: Analyzing trace with hash -634219669, now seen corresponding path program 1 times [2024-06-14 11:50:24,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:24,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75919870] [2024-06-14 11:50:24,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:24,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75919870] [2024-06-14 11:50:25,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75919870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:25,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:25,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:50:25,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679417024] [2024-06-14 11:50:25,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:25,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:50:25,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:25,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:50:25,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:50:25,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:50:25,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 914 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 11:50:25,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:25,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:50:25,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:26,002 INFO L124 PetriNetUnfolderBase]: 1513/2452 cut-off events. [2024-06-14 11:50:26,002 INFO L125 PetriNetUnfolderBase]: For 18402/18421 co-relation queries the response was YES. [2024-06-14 11:50:26,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10787 conditions, 2452 events. 1513/2452 cut-off events. For 18402/18421 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12962 event pairs, 514 based on Foata normal form. 8/2441 useless extension candidates. Maximal degree in co-relation 10751. Up to 2210 conditions per place. [2024-06-14 11:50:26,017 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 90 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-06-14 11:50:26,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 1154 flow [2024-06-14 11:50:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:50:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:50:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-14 11:50:26,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-14 11:50:26,019 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 914 flow. Second operand 5 states and 101 transitions. [2024-06-14 11:50:26,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 1154 flow [2024-06-14 11:50:26,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 1011 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:26,036 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 819 flow [2024-06-14 11:50:26,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=819, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-14 11:50:26,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 11:50:26,037 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 819 flow [2024-06-14 11:50:26,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 11:50:26,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:26,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:26,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:50:26,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:26,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash 75192260, now seen corresponding path program 1 times [2024-06-14 11:50:26,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:26,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945327648] [2024-06-14 11:50:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:26,768 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 11:50:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945327648] [2024-06-14 11:50:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945327648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:26,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166487141] [2024-06-14 11:50:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:26,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:26,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 819 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:50:26,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:26,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:26,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:27,468 INFO L124 PetriNetUnfolderBase]: 1866/2890 cut-off events. [2024-06-14 11:50:27,469 INFO L125 PetriNetUnfolderBase]: For 22606/22612 co-relation queries the response was YES. [2024-06-14 11:50:27,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12846 conditions, 2890 events. 1866/2890 cut-off events. For 22606/22612 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14648 event pairs, 576 based on Foata normal form. 14/2898 useless extension candidates. Maximal degree in co-relation 12809. Up to 2328 conditions per place. [2024-06-14 11:50:27,487 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 63 changer transitions 0/141 dead transitions. [2024-06-14 11:50:27,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 141 transitions, 1313 flow [2024-06-14 11:50:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-14 11:50:27,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4983388704318937 [2024-06-14 11:50:27,489 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 819 flow. Second operand 7 states and 150 transitions. [2024-06-14 11:50:27,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 141 transitions, 1313 flow [2024-06-14 11:50:27,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 141 transitions, 1287 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:27,511 INFO L231 Difference]: Finished difference. Result has 85 places, 109 transitions, 1006 flow [2024-06-14 11:50:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1006, PETRI_PLACES=85, PETRI_TRANSITIONS=109} [2024-06-14 11:50:27,512 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-14 11:50:27,512 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 109 transitions, 1006 flow [2024-06-14 11:50:27,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:50:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:50:27,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:27,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash 879351268, now seen corresponding path program 2 times [2024-06-14 11:50:27,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055913475] [2024-06-14 11:50:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:28,367 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 11:50:28,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:28,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055913475] [2024-06-14 11:50:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055913475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:28,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:28,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:28,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634215505] [2024-06-14 11:50:28,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:28,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:28,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:28,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 109 transitions, 1006 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 11:50:28,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:28,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:28,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:29,192 INFO L124 PetriNetUnfolderBase]: 1898/2946 cut-off events. [2024-06-14 11:50:29,193 INFO L125 PetriNetUnfolderBase]: For 26679/26681 co-relation queries the response was YES. [2024-06-14 11:50:29,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13752 conditions, 2946 events. 1898/2946 cut-off events. For 26679/26681 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15041 event pairs, 578 based on Foata normal form. 8/2948 useless extension candidates. Maximal degree in co-relation 13714. Up to 2357 conditions per place. [2024-06-14 11:50:29,212 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 68 changer transitions 0/149 dead transitions. [2024-06-14 11:50:29,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1538 flow [2024-06-14 11:50:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-14 11:50:29,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 11:50:29,213 INFO L175 Difference]: Start difference. First operand has 85 places, 109 transitions, 1006 flow. Second operand 8 states and 164 transitions. [2024-06-14 11:50:29,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1538 flow [2024-06-14 11:50:29,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 149 transitions, 1323 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:29,236 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 1027 flow [2024-06-14 11:50:29,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2024-06-14 11:50:29,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 11:50:29,238 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 1027 flow [2024-06-14 11:50:29,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 11:50:29,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:29,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:29,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:50:29,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:29,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1129806284, now seen corresponding path program 3 times [2024-06-14 11:50:29,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:29,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636147000] [2024-06-14 11:50:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:29,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:30,039 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 11:50:30,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:30,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636147000] [2024-06-14 11:50:30,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636147000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:30,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:30,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:30,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998621903] [2024-06-14 11:50:30,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:30,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:30,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:30,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:30,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:30,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:30,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 1027 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 11:50:30,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:30,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:30,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:30,876 INFO L124 PetriNetUnfolderBase]: 1934/2991 cut-off events. [2024-06-14 11:50:30,876 INFO L125 PetriNetUnfolderBase]: For 29078/29084 co-relation queries the response was YES. [2024-06-14 11:50:30,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14172 conditions, 2991 events. 1934/2991 cut-off events. For 29078/29084 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15256 event pairs, 588 based on Foata normal form. 7/2976 useless extension candidates. Maximal degree in co-relation 14134. Up to 2389 conditions per place. [2024-06-14 11:50:30,892 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 76 changer transitions 0/152 dead transitions. [2024-06-14 11:50:30,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 1553 flow [2024-06-14 11:50:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:50:30,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-14 11:50:30,894 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 1027 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:50:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 1553 flow [2024-06-14 11:50:30,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 152 transitions, 1428 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:50:30,918 INFO L231 Difference]: Finished difference. Result has 90 places, 121 transitions, 1147 flow [2024-06-14 11:50:30,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=90, PETRI_TRANSITIONS=121} [2024-06-14 11:50:30,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 11:50:30,919 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 121 transitions, 1147 flow [2024-06-14 11:50:30,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 11:50:30,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:30,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:50:30,920 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:30,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1908094552, now seen corresponding path program 4 times [2024-06-14 11:50:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:30,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347176999] [2024-06-14 11:50:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:31,660 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 11:50:31,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347176999] [2024-06-14 11:50:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347176999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:31,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:31,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860398340] [2024-06-14 11:50:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:31,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:31,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 121 transitions, 1147 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 11:50:31,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:31,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:31,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:32,578 INFO L124 PetriNetUnfolderBase]: 1918/2989 cut-off events. [2024-06-14 11:50:32,578 INFO L125 PetriNetUnfolderBase]: For 31926/31932 co-relation queries the response was YES. [2024-06-14 11:50:32,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14240 conditions, 2989 events. 1918/2989 cut-off events. For 31926/31932 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15393 event pairs, 562 based on Foata normal form. 7/2986 useless extension candidates. Maximal degree in co-relation 14201. Up to 2376 conditions per place. [2024-06-14 11:50:32,596 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 78 changer transitions 0/156 dead transitions. [2024-06-14 11:50:32,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1563 flow [2024-06-14 11:50:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:50:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:50:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-14 11:50:32,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-14 11:50:32,598 INFO L175 Difference]: Start difference. First operand has 90 places, 121 transitions, 1147 flow. Second operand 9 states and 178 transitions. [2024-06-14 11:50:32,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1563 flow [2024-06-14 11:50:32,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 156 transitions, 1407 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:50:32,632 INFO L231 Difference]: Finished difference. Result has 94 places, 121 transitions, 1158 flow [2024-06-14 11:50:32,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1158, PETRI_PLACES=94, PETRI_TRANSITIONS=121} [2024-06-14 11:50:32,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 11:50:32,633 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 121 transitions, 1158 flow [2024-06-14 11:50:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 11:50:32,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:32,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:32,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:50:32,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:32,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 282128327, now seen corresponding path program 1 times [2024-06-14 11:50:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:32,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123564870] [2024-06-14 11:50:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:33,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:33,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123564870] [2024-06-14 11:50:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123564870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:33,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:33,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:33,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288861630] [2024-06-14 11:50:33,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:33,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:33,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:33,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:33,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 121 transitions, 1158 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:33,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:33,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:33,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:34,313 INFO L124 PetriNetUnfolderBase]: 1703/2749 cut-off events. [2024-06-14 11:50:34,313 INFO L125 PetriNetUnfolderBase]: For 30148/30150 co-relation queries the response was YES. [2024-06-14 11:50:34,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13070 conditions, 2749 events. 1703/2749 cut-off events. For 30148/30150 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14602 event pairs, 550 based on Foata normal form. 4/2751 useless extension candidates. Maximal degree in co-relation 13029. Up to 2485 conditions per place. [2024-06-14 11:50:34,328 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 128 selfloop transitions, 16 changer transitions 0/150 dead transitions. [2024-06-14 11:50:34,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1563 flow [2024-06-14 11:50:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:50:34,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:50:34,331 INFO L175 Difference]: Start difference. First operand has 94 places, 121 transitions, 1158 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:50:34,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1563 flow [2024-06-14 11:50:34,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 150 transitions, 1288 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 11:50:34,358 INFO L231 Difference]: Finished difference. Result has 93 places, 126 transitions, 977 flow [2024-06-14 11:50:34,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=93, PETRI_TRANSITIONS=126} [2024-06-14 11:50:34,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 11:50:34,359 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 126 transitions, 977 flow [2024-06-14 11:50:34,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:34,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:34,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:34,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:50:34,359 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:34,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1814028228, now seen corresponding path program 1 times [2024-06-14 11:50:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:34,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959232780] [2024-06-14 11:50:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:34,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:35,261 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 11:50:35,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:35,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959232780] [2024-06-14 11:50:35,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959232780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:35,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:35,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745376262] [2024-06-14 11:50:35,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:35,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:35,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:35,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:35,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-14 11:50:35,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 126 transitions, 977 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:35,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:35,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-14 11:50:35,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:35,754 INFO L124 PetriNetUnfolderBase]: 1587/2604 cut-off events. [2024-06-14 11:50:35,754 INFO L125 PetriNetUnfolderBase]: For 30431/30451 co-relation queries the response was YES. [2024-06-14 11:50:35,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12333 conditions, 2604 events. 1587/2604 cut-off events. For 30431/30451 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14076 event pairs, 515 based on Foata normal form. 10/2595 useless extension candidates. Maximal degree in co-relation 12291. Up to 2314 conditions per place. [2024-06-14 11:50:35,768 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 115 selfloop transitions, 11 changer transitions 0/139 dead transitions. [2024-06-14 11:50:35,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 139 transitions, 1283 flow [2024-06-14 11:50:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 11:50:35,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 11:50:35,770 INFO L175 Difference]: Start difference. First operand has 93 places, 126 transitions, 977 flow. Second operand 6 states and 118 transitions. [2024-06-14 11:50:35,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 139 transitions, 1283 flow [2024-06-14 11:50:35,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1236 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 11:50:35,793 INFO L231 Difference]: Finished difference. Result has 94 places, 129 transitions, 990 flow [2024-06-14 11:50:35,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=990, PETRI_PLACES=94, PETRI_TRANSITIONS=129} [2024-06-14 11:50:35,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 11:50:35,796 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 129 transitions, 990 flow [2024-06-14 11:50:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:35,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:35,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:35,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:50:35,796 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:35,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash 510291889, now seen corresponding path program 1 times [2024-06-14 11:50:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395336474] [2024-06-14 11:50:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:35,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:36,505 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 11:50:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:36,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395336474] [2024-06-14 11:50:36,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395336474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:36,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:36,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:36,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913937630] [2024-06-14 11:50:36,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:36,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:36,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:36,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:36,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:36,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 129 transitions, 990 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:50:36,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:37,138 INFO L124 PetriNetUnfolderBase]: 1918/2995 cut-off events. [2024-06-14 11:50:37,138 INFO L125 PetriNetUnfolderBase]: For 38782/38787 co-relation queries the response was YES. [2024-06-14 11:50:37,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14709 conditions, 2995 events. 1918/2995 cut-off events. For 38782/38787 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15472 event pairs, 429 based on Foata normal form. 6/2998 useless extension candidates. Maximal degree in co-relation 14666. Up to 2593 conditions per place. [2024-06-14 11:50:37,156 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 122 selfloop transitions, 32 changer transitions 0/159 dead transitions. [2024-06-14 11:50:37,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 159 transitions, 1488 flow [2024-06-14 11:50:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:50:37,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 11:50:37,158 INFO L175 Difference]: Start difference. First operand has 94 places, 129 transitions, 990 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:50:37,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 159 transitions, 1488 flow [2024-06-14 11:50:37,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 159 transitions, 1450 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:37,191 INFO L231 Difference]: Finished difference. Result has 97 places, 133 transitions, 1071 flow [2024-06-14 11:50:37,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=97, PETRI_TRANSITIONS=133} [2024-06-14 11:50:37,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 11:50:37,192 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 133 transitions, 1071 flow [2024-06-14 11:50:37,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:50:37,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:37,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:50:37,193 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:37,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash 513148849, now seen corresponding path program 2 times [2024-06-14 11:50:37,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979605339] [2024-06-14 11:50:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979605339] [2024-06-14 11:50:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979605339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:37,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:37,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882193069] [2024-06-14 11:50:37,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:37,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:37,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:37,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:37,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 133 transitions, 1071 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:50:37,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:37,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:37,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:38,639 INFO L124 PetriNetUnfolderBase]: 1910/2978 cut-off events. [2024-06-14 11:50:38,639 INFO L125 PetriNetUnfolderBase]: For 42349/42354 co-relation queries the response was YES. [2024-06-14 11:50:38,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15025 conditions, 2978 events. 1910/2978 cut-off events. For 42349/42354 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15277 event pairs, 567 based on Foata normal form. 6/2981 useless extension candidates. Maximal degree in co-relation 14981. Up to 2669 conditions per place. [2024-06-14 11:50:38,656 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 33 changer transitions 0/157 dead transitions. [2024-06-14 11:50:38,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 157 transitions, 1453 flow [2024-06-14 11:50:38,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:50:38,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 11:50:38,658 INFO L175 Difference]: Start difference. First operand has 97 places, 133 transitions, 1071 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:50:38,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 157 transitions, 1453 flow [2024-06-14 11:50:38,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 157 transitions, 1393 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:38,695 INFO L231 Difference]: Finished difference. Result has 101 places, 133 transitions, 1086 flow [2024-06-14 11:50:38,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=101, PETRI_TRANSITIONS=133} [2024-06-14 11:50:38,695 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 11:50:38,696 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 133 transitions, 1086 flow [2024-06-14 11:50:38,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 11:50:38,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:38,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:38,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:50:38,696 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:38,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash 387906698, now seen corresponding path program 1 times [2024-06-14 11:50:38,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:38,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70960716] [2024-06-14 11:50:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:39,417 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 11:50:39,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70960716] [2024-06-14 11:50:39,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70960716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:39,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:39,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:39,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499048817] [2024-06-14 11:50:39,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:39,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:39,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:39,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:39,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:39,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 133 transitions, 1086 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:39,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:39,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:39,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:39,904 INFO L124 PetriNetUnfolderBase]: 1794/2850 cut-off events. [2024-06-14 11:50:39,904 INFO L125 PetriNetUnfolderBase]: For 46114/46134 co-relation queries the response was YES. [2024-06-14 11:50:39,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14692 conditions, 2850 events. 1794/2850 cut-off events. For 46114/46134 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15025 event pairs, 569 based on Foata normal form. 11/2851 useless extension candidates. Maximal degree in co-relation 14646. Up to 2592 conditions per place. [2024-06-14 11:50:39,923 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 125 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-14 11:50:39,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 152 transitions, 1442 flow [2024-06-14 11:50:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-14 11:50:39,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 11:50:39,925 INFO L175 Difference]: Start difference. First operand has 101 places, 133 transitions, 1086 flow. Second operand 6 states and 118 transitions. [2024-06-14 11:50:39,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 152 transitions, 1442 flow [2024-06-14 11:50:39,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1367 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:39,955 INFO L231 Difference]: Finished difference. Result has 101 places, 136 transitions, 1076 flow [2024-06-14 11:50:39,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1076, PETRI_PLACES=101, PETRI_TRANSITIONS=136} [2024-06-14 11:50:39,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 11:50:39,956 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 136 transitions, 1076 flow [2024-06-14 11:50:39,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:39,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:39,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:39,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:50:39,957 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:39,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash 400286858, now seen corresponding path program 2 times [2024-06-14 11:50:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663494386] [2024-06-14 11:50:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:40,677 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 11:50:40,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:40,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663494386] [2024-06-14 11:50:40,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663494386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:40,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:40,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:40,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57924727] [2024-06-14 11:50:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:40,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:40,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:40,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:40,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 136 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:40,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:40,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:40,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:41,111 INFO L124 PetriNetUnfolderBase]: 1791/2854 cut-off events. [2024-06-14 11:50:41,111 INFO L125 PetriNetUnfolderBase]: For 49650/49677 co-relation queries the response was YES. [2024-06-14 11:50:41,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 2854 events. 1791/2854 cut-off events. For 49650/49677 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15110 event pairs, 566 based on Foata normal form. 16/2861 useless extension candidates. Maximal degree in co-relation 14955. Up to 2582 conditions per place. [2024-06-14 11:50:41,131 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 118 selfloop transitions, 18 changer transitions 0/150 dead transitions. [2024-06-14 11:50:41,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 150 transitions, 1418 flow [2024-06-14 11:50:41,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 11:50:41,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:50:41,132 INFO L175 Difference]: Start difference. First operand has 101 places, 136 transitions, 1076 flow. Second operand 6 states and 114 transitions. [2024-06-14 11:50:41,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 150 transitions, 1418 flow [2024-06-14 11:50:41,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 1377 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:41,168 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1115 flow [2024-06-14 11:50:41,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1115, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-06-14 11:50:41,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 11:50:41,173 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1115 flow [2024-06-14 11:50:41,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:41,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:41,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:41,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:50:41,174 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:41,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:41,174 INFO L85 PathProgramCache]: Analyzing trace with hash 393626570, now seen corresponding path program 1 times [2024-06-14 11:50:41,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:41,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145937114] [2024-06-14 11:50:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:41,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:41,791 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 11:50:41,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:41,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145937114] [2024-06-14 11:50:41,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145937114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:41,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:41,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:41,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431186887] [2024-06-14 11:50:41,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:41,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:41,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:41,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:41,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:41,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:41,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1115 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:41,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:41,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:41,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:42,339 INFO L124 PetriNetUnfolderBase]: 1713/2770 cut-off events. [2024-06-14 11:50:42,339 INFO L125 PetriNetUnfolderBase]: For 45600/45602 co-relation queries the response was YES. [2024-06-14 11:50:42,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14574 conditions, 2770 events. 1713/2770 cut-off events. For 45600/45602 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14685 event pairs, 534 based on Foata normal form. 1/2769 useless extension candidates. Maximal degree in co-relation 14526. Up to 2535 conditions per place. [2024-06-14 11:50:42,358 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 137 selfloop transitions, 11 changer transitions 0/154 dead transitions. [2024-06-14 11:50:42,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 154 transitions, 1477 flow [2024-06-14 11:50:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 11:50:42,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-14 11:50:42,359 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1115 flow. Second operand 6 states and 115 transitions. [2024-06-14 11:50:42,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 154 transitions, 1477 flow [2024-06-14 11:50:42,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 1419 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:42,393 INFO L231 Difference]: Finished difference. Result has 105 places, 142 transitions, 1121 flow [2024-06-14 11:50:42,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1121, PETRI_PLACES=105, PETRI_TRANSITIONS=142} [2024-06-14 11:50:42,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 11:50:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 142 transitions, 1121 flow [2024-06-14 11:50:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:42,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:42,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:50:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:50:42,394 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:42,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash 400292810, now seen corresponding path program 2 times [2024-06-14 11:50:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:42,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389541650] [2024-06-14 11:50:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:42,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:43,082 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 11:50:43,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:43,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389541650] [2024-06-14 11:50:43,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389541650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:43,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:43,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:50:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463830613] [2024-06-14 11:50:43,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:43,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:50:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:50:43,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:50:43,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:43,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 1121 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:43,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:43,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:43,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:43,572 INFO L124 PetriNetUnfolderBase]: 1710/2767 cut-off events. [2024-06-14 11:50:43,573 INFO L125 PetriNetUnfolderBase]: For 48959/48964 co-relation queries the response was YES. [2024-06-14 11:50:43,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14890 conditions, 2767 events. 1710/2767 cut-off events. For 48959/48964 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14712 event pairs, 538 based on Foata normal form. 3/2767 useless extension candidates. Maximal degree in co-relation 14841. Up to 2525 conditions per place. [2024-06-14 11:50:43,591 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 132 selfloop transitions, 16 changer transitions 0/154 dead transitions. [2024-06-14 11:50:43,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1479 flow [2024-06-14 11:50:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:50:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:50:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 11:50:43,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:50:43,592 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 1121 flow. Second operand 6 states and 114 transitions. [2024-06-14 11:50:43,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1479 flow [2024-06-14 11:50:43,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1437 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:43,633 INFO L231 Difference]: Finished difference. Result has 107 places, 145 transitions, 1159 flow [2024-06-14 11:50:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1159, PETRI_PLACES=107, PETRI_TRANSITIONS=145} [2024-06-14 11:50:43,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 11:50:43,633 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 145 transitions, 1159 flow [2024-06-14 11:50:43,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:43,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:43,634 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 11:50:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:50:43,634 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:43,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1360819295, now seen corresponding path program 1 times [2024-06-14 11:50:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:43,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612323412] [2024-06-14 11:50:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:44,369 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 11:50:44,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:44,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612323412] [2024-06-14 11:50:44,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612323412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:44,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:44,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:44,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883368641] [2024-06-14 11:50:44,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:44,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:44,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:44,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:44,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:44,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 145 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:44,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:44,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:44,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:45,102 INFO L124 PetriNetUnfolderBase]: 2058/3238 cut-off events. [2024-06-14 11:50:45,103 INFO L125 PetriNetUnfolderBase]: For 71722/71727 co-relation queries the response was YES. [2024-06-14 11:50:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18268 conditions, 3238 events. 2058/3238 cut-off events. For 71722/71727 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16989 event pairs, 443 based on Foata normal form. 16/3249 useless extension candidates. Maximal degree in co-relation 18218. Up to 2033 conditions per place. [2024-06-14 11:50:45,123 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 108 selfloop transitions, 73 changer transitions 0/186 dead transitions. [2024-06-14 11:50:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1773 flow [2024-06-14 11:50:45,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:50:45,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 11:50:45,125 INFO L175 Difference]: Start difference. First operand has 107 places, 145 transitions, 1159 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:50:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1773 flow [2024-06-14 11:50:45,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1715 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:45,168 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1291 flow [2024-06-14 11:50:45,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-14 11:50:45,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 11:50:45,169 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1291 flow [2024-06-14 11:50:45,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:45,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:45,169 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 11:50:45,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:50:45,169 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:45,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:45,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1358941625, now seen corresponding path program 2 times [2024-06-14 11:50:45,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:45,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295532961] [2024-06-14 11:50:45,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:45,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:45,909 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 11:50:45,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:45,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295532961] [2024-06-14 11:50:45,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295532961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:45,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:45,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650989947] [2024-06-14 11:50:45,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:45,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:45,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:45,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:45,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1291 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:45,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:45,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:45,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:46,692 INFO L124 PetriNetUnfolderBase]: 2150/3391 cut-off events. [2024-06-14 11:50:46,692 INFO L125 PetriNetUnfolderBase]: For 80172/80177 co-relation queries the response was YES. [2024-06-14 11:50:46,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19549 conditions, 3391 events. 2150/3391 cut-off events. For 80172/80177 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18092 event pairs, 584 based on Foata normal form. 24/3410 useless extension candidates. Maximal degree in co-relation 19498. Up to 2595 conditions per place. [2024-06-14 11:50:46,717 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 78 changer transitions 0/183 dead transitions. [2024-06-14 11:50:46,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 183 transitions, 1795 flow [2024-06-14 11:50:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:50:46,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 11:50:46,718 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1291 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:50:46,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 183 transitions, 1795 flow [2024-06-14 11:50:46,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 183 transitions, 1709 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:46,771 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1409 flow [2024-06-14 11:50:46,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1409, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-14 11:50:46,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-14 11:50:46,772 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1409 flow [2024-06-14 11:50:46,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:46,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:46,772 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 11:50:46,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:50:46,773 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:46,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1976909045, now seen corresponding path program 3 times [2024-06-14 11:50:46,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:46,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425041864] [2024-06-14 11:50:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:46,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:47,455 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 11:50:47,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:47,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425041864] [2024-06-14 11:50:47,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425041864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:47,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:47,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:47,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628039092] [2024-06-14 11:50:47,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:47,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:47,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:47,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:47,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:47,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:47,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1409 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:47,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:47,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:47,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:48,293 INFO L124 PetriNetUnfolderBase]: 2208/3506 cut-off events. [2024-06-14 11:50:48,294 INFO L125 PetriNetUnfolderBase]: For 85936/85941 co-relation queries the response was YES. [2024-06-14 11:50:48,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20734 conditions, 3506 events. 2208/3506 cut-off events. For 85936/85941 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19094 event pairs, 607 based on Foata normal form. 16/3517 useless extension candidates. Maximal degree in co-relation 20681. Up to 2575 conditions per place. [2024-06-14 11:50:48,319 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 103 selfloop transitions, 79 changer transitions 0/187 dead transitions. [2024-06-14 11:50:48,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 187 transitions, 1919 flow [2024-06-14 11:50:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:50:48,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 11:50:48,320 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1409 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:50:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 187 transitions, 1919 flow [2024-06-14 11:50:48,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1751 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:48,391 INFO L231 Difference]: Finished difference. Result has 117 places, 150 transitions, 1429 flow [2024-06-14 11:50:48,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1241, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1429, PETRI_PLACES=117, PETRI_TRANSITIONS=150} [2024-06-14 11:50:48,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 11:50:48,392 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 150 transitions, 1429 flow [2024-06-14 11:50:48,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:48,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:48,393 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 11:50:48,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:50:48,393 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:48,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash 949203088, now seen corresponding path program 1 times [2024-06-14 11:50:48,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:48,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368124902] [2024-06-14 11:50:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:49,141 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 11:50:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:49,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368124902] [2024-06-14 11:50:49,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368124902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:49,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:49,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493457935] [2024-06-14 11:50:49,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:49,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:49,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:49,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:49,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 150 transitions, 1429 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:49,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:49,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:49,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:49,786 INFO L124 PetriNetUnfolderBase]: 2253/3580 cut-off events. [2024-06-14 11:50:49,786 INFO L125 PetriNetUnfolderBase]: For 87795/87802 co-relation queries the response was YES. [2024-06-14 11:50:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21342 conditions, 3580 events. 2253/3580 cut-off events. For 87795/87802 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 19461 event pairs, 644 based on Foata normal form. 8/3581 useless extension candidates. Maximal degree in co-relation 21288. Up to 3223 conditions per place. [2024-06-14 11:50:49,812 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 136 selfloop transitions, 45 changer transitions 0/186 dead transitions. [2024-06-14 11:50:49,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 186 transitions, 2061 flow [2024-06-14 11:50:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:49,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:50:49,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:50:49,814 INFO L175 Difference]: Start difference. First operand has 117 places, 150 transitions, 1429 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:50:49,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 186 transitions, 2061 flow [2024-06-14 11:50:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 1871 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:49,881 INFO L231 Difference]: Finished difference. Result has 123 places, 167 transitions, 1603 flow [2024-06-14 11:50:49,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1603, PETRI_PLACES=123, PETRI_TRANSITIONS=167} [2024-06-14 11:50:49,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-14 11:50:49,882 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 167 transitions, 1603 flow [2024-06-14 11:50:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:49,882 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 11:50:49,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:50:49,883 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:49,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1993194561, now seen corresponding path program 4 times [2024-06-14 11:50:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484126084] [2024-06-14 11:50:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:50,654 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 11:50:50,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:50,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484126084] [2024-06-14 11:50:50,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484126084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:50,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:50,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598183855] [2024-06-14 11:50:50,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:50,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:50,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:50,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 167 transitions, 1603 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:50,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:50,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:50,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:51,539 INFO L124 PetriNetUnfolderBase]: 2372/3805 cut-off events. [2024-06-14 11:50:51,539 INFO L125 PetriNetUnfolderBase]: For 102049/102060 co-relation queries the response was YES. [2024-06-14 11:50:51,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22974 conditions, 3805 events. 2372/3805 cut-off events. For 102049/102060 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21194 event pairs, 473 based on Foata normal form. 24/3824 useless extension candidates. Maximal degree in co-relation 22915. Up to 2681 conditions per place. [2024-06-14 11:50:51,569 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 91 changer transitions 0/210 dead transitions. [2024-06-14 11:50:51,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 210 transitions, 2301 flow [2024-06-14 11:50:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 11:50:51,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502906976744186 [2024-06-14 11:50:51,571 INFO L175 Difference]: Start difference. First operand has 123 places, 167 transitions, 1603 flow. Second operand 8 states and 173 transitions. [2024-06-14 11:50:51,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 210 transitions, 2301 flow [2024-06-14 11:50:51,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 210 transitions, 2227 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 11:50:51,665 INFO L231 Difference]: Finished difference. Result has 129 places, 169 transitions, 1767 flow [2024-06-14 11:50:51,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1767, PETRI_PLACES=129, PETRI_TRANSITIONS=169} [2024-06-14 11:50:51,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 11:50:51,666 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 169 transitions, 1767 flow [2024-06-14 11:50:51,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:51,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:51,666 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 11:50:51,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:50:51,667 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:51,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1993046691, now seen corresponding path program 5 times [2024-06-14 11:50:51,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:51,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994684740] [2024-06-14 11:50:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:51,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:52,408 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 11:50:52,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:52,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994684740] [2024-06-14 11:50:52,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994684740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:52,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:52,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:50:52,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135211592] [2024-06-14 11:50:52,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:52,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:50:52,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:52,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:50:52,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:50:52,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:52,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 169 transitions, 1767 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:52,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:52,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:52,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:53,375 INFO L124 PetriNetUnfolderBase]: 2447/3924 cut-off events. [2024-06-14 11:50:53,375 INFO L125 PetriNetUnfolderBase]: For 113160/113171 co-relation queries the response was YES. [2024-06-14 11:50:53,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24166 conditions, 3924 events. 2447/3924 cut-off events. For 113160/113171 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 22040 event pairs, 615 based on Foata normal form. 28/3947 useless extension candidates. Maximal degree in co-relation 24105. Up to 3087 conditions per place. [2024-06-14 11:50:53,405 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 113 selfloop transitions, 89 changer transitions 0/207 dead transitions. [2024-06-14 11:50:53,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2331 flow [2024-06-14 11:50:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:50:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:50:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 11:50:53,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 11:50:53,407 INFO L175 Difference]: Start difference. First operand has 129 places, 169 transitions, 1767 flow. Second operand 8 states and 168 transitions. [2024-06-14 11:50:53,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2331 flow [2024-06-14 11:50:53,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2210 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:53,509 INFO L231 Difference]: Finished difference. Result has 133 places, 170 transitions, 1861 flow [2024-06-14 11:50:53,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=133, PETRI_TRANSITIONS=170} [2024-06-14 11:50:53,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 11:50:53,509 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 170 transitions, 1861 flow [2024-06-14 11:50:53,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 11:50:53,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:53,510 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 11:50:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:50:53,510 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:53,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1987684311, now seen corresponding path program 6 times [2024-06-14 11:50:53,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:53,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652692627] [2024-06-14 11:50:53,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:53,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:54,348 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 11:50:54,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:54,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652692627] [2024-06-14 11:50:54,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652692627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:54,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:54,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:50:54,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213659789] [2024-06-14 11:50:54,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:54,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:50:54,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:50:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:50:54,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:54,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 170 transitions, 1861 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:50:54,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:54,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:54,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:55,383 INFO L124 PetriNetUnfolderBase]: 2522/4035 cut-off events. [2024-06-14 11:50:55,383 INFO L125 PetriNetUnfolderBase]: For 120915/120920 co-relation queries the response was YES. [2024-06-14 11:50:55,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25280 conditions, 4035 events. 2522/4035 cut-off events. For 120915/120920 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22791 event pairs, 630 based on Foata normal form. 20/4050 useless extension candidates. Maximal degree in co-relation 25217. Up to 3212 conditions per place. [2024-06-14 11:50:55,414 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 118 selfloop transitions, 87 changer transitions 0/210 dead transitions. [2024-06-14 11:50:55,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 210 transitions, 2435 flow [2024-06-14 11:50:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:50:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:50:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:50:55,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-14 11:50:55,416 INFO L175 Difference]: Start difference. First operand has 133 places, 170 transitions, 1861 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:50:55,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 210 transitions, 2435 flow [2024-06-14 11:50:55,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 210 transitions, 2248 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:55,533 INFO L231 Difference]: Finished difference. Result has 136 places, 171 transitions, 1887 flow [2024-06-14 11:50:55,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1887, PETRI_PLACES=136, PETRI_TRANSITIONS=171} [2024-06-14 11:50:55,534 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 11:50:55,534 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 171 transitions, 1887 flow [2024-06-14 11:50:55,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:50:55,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:55,534 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 11:50:55,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:50:55,535 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:55,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1088850731, now seen corresponding path program 1 times [2024-06-14 11:50:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:55,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573581790] [2024-06-14 11:50:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:55,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:56,354 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 11:50:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:56,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573581790] [2024-06-14 11:50:56,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573581790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:56,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:56,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:56,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754121716] [2024-06-14 11:50:56,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:56,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:56,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:56,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:50:56,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 171 transitions, 1887 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:50:56,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:56,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:50:56,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:56,982 INFO L124 PetriNetUnfolderBase]: 2405/3899 cut-off events. [2024-06-14 11:50:56,983 INFO L125 PetriNetUnfolderBase]: For 120352/120377 co-relation queries the response was YES. [2024-06-14 11:50:57,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24660 conditions, 3899 events. 2405/3899 cut-off events. For 120352/120377 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22627 event pairs, 733 based on Foata normal form. 13/3883 useless extension candidates. Maximal degree in co-relation 24596. Up to 3566 conditions per place. [2024-06-14 11:50:57,015 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 152 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-06-14 11:50:57,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 2321 flow [2024-06-14 11:50:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:50:57,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:50:57,017 INFO L175 Difference]: Start difference. First operand has 136 places, 171 transitions, 1887 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:50:57,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 2321 flow [2024-06-14 11:50:57,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 190 transitions, 2136 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:50:57,230 INFO L231 Difference]: Finished difference. Result has 136 places, 174 transitions, 1788 flow [2024-06-14 11:50:57,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1702, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=136, PETRI_TRANSITIONS=174} [2024-06-14 11:50:57,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 11:50:57,231 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 174 transitions, 1788 flow [2024-06-14 11:50:57,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:50:57,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:57,231 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 11:50:57,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:50:57,231 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:57,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -859793166, now seen corresponding path program 2 times [2024-06-14 11:50:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:57,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053336862] [2024-06-14 11:50:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:57,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:57,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:57,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053336862] [2024-06-14 11:50:57,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053336862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:57,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:57,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:57,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336038580] [2024-06-14 11:50:57,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:57,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:57,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:57,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 174 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:57,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:57,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:57,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:58,575 INFO L124 PetriNetUnfolderBase]: 2563/4106 cut-off events. [2024-06-14 11:50:58,575 INFO L125 PetriNetUnfolderBase]: For 126464/126469 co-relation queries the response was YES. [2024-06-14 11:50:58,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25867 conditions, 4106 events. 2563/4106 cut-off events. For 126464/126469 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 23431 event pairs, 752 based on Foata normal form. 4/4107 useless extension candidates. Maximal degree in co-relation 25802. Up to 3678 conditions per place. [2024-06-14 11:50:58,604 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 147 selfloop transitions, 47 changer transitions 0/199 dead transitions. [2024-06-14 11:50:58,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 199 transitions, 2420 flow [2024-06-14 11:50:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:50:58,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 11:50:58,605 INFO L175 Difference]: Start difference. First operand has 136 places, 174 transitions, 1788 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:50:58,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 199 transitions, 2420 flow [2024-06-14 11:50:58,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2356 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:50:58,755 INFO L231 Difference]: Finished difference. Result has 139 places, 182 transitions, 1968 flow [2024-06-14 11:50:58,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1968, PETRI_PLACES=139, PETRI_TRANSITIONS=182} [2024-06-14 11:50:58,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 11:50:58,756 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 182 transitions, 1968 flow [2024-06-14 11:50:58,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:58,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:58,756 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 11:50:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:50:58,757 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:58,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1592775093, now seen corresponding path program 7 times [2024-06-14 11:50:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:58,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248083405] [2024-06-14 11:50:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:59,534 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 11:50:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248083405] [2024-06-14 11:50:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248083405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:59,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:59,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:50:59,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151334705] [2024-06-14 11:50:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:59,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:50:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:59,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:50:59,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:50:59,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:50:59,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 182 transitions, 1968 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:50:59,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:59,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:50:59,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:00,883 INFO L124 PetriNetUnfolderBase]: 2638/4227 cut-off events. [2024-06-14 11:51:00,884 INFO L125 PetriNetUnfolderBase]: For 145438/145440 co-relation queries the response was YES. [2024-06-14 11:51:00,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27431 conditions, 4227 events. 2638/4227 cut-off events. For 145438/145440 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24257 event pairs, 624 based on Foata normal form. 20/4235 useless extension candidates. Maximal degree in co-relation 27364. Up to 3400 conditions per place. [2024-06-14 11:51:00,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 131 selfloop transitions, 90 changer transitions 0/226 dead transitions. [2024-06-14 11:51:00,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 226 transitions, 2596 flow [2024-06-14 11:51:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:51:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:51:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 11:51:00,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-14 11:51:00,923 INFO L175 Difference]: Start difference. First operand has 139 places, 182 transitions, 1968 flow. Second operand 10 states and 198 transitions. [2024-06-14 11:51:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 226 transitions, 2596 flow [2024-06-14 11:51:01,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 226 transitions, 2498 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:01,080 INFO L231 Difference]: Finished difference. Result has 146 places, 183 transitions, 2091 flow [2024-06-14 11:51:01,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=146, PETRI_TRANSITIONS=183} [2024-06-14 11:51:01,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 11:51:01,083 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 183 transitions, 2091 flow [2024-06-14 11:51:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:01,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:01,083 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 11:51:01,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:51:01,083 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:01,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash 654133185, now seen corresponding path program 8 times [2024-06-14 11:51:01,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:01,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241521739] [2024-06-14 11:51:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:01,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:02,127 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 11:51:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241521739] [2024-06-14 11:51:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241521739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:02,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:02,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749466863] [2024-06-14 11:51:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:02,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:02,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 183 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:02,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:02,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:02,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:03,143 INFO L124 PetriNetUnfolderBase]: 2602/4150 cut-off events. [2024-06-14 11:51:03,144 INFO L125 PetriNetUnfolderBase]: For 145217/145219 co-relation queries the response was YES. [2024-06-14 11:51:03,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 4150 events. 2602/4150 cut-off events. For 145217/145219 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23613 event pairs, 629 based on Foata normal form. 20/4146 useless extension candidates. Maximal degree in co-relation 27152. Up to 3344 conditions per place. [2024-06-14 11:51:03,176 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 87 changer transitions 0/220 dead transitions. [2024-06-14 11:51:03,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 220 transitions, 2655 flow [2024-06-14 11:51:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:51:03,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-14 11:51:03,177 INFO L175 Difference]: Start difference. First operand has 146 places, 183 transitions, 2091 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:51:03,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 220 transitions, 2655 flow [2024-06-14 11:51:03,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 220 transitions, 2452 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:03,346 INFO L231 Difference]: Finished difference. Result has 147 places, 183 transitions, 2071 flow [2024-06-14 11:51:03,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2071, PETRI_PLACES=147, PETRI_TRANSITIONS=183} [2024-06-14 11:51:03,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-14 11:51:03,347 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 183 transitions, 2071 flow [2024-06-14 11:51:03,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:03,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:03,347 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 11:51:03,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:51:03,347 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:03,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1801392486, now seen corresponding path program 1 times [2024-06-14 11:51:03,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:03,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146590587] [2024-06-14 11:51:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:03,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:04,176 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 11:51:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146590587] [2024-06-14 11:51:04,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146590587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:04,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416595731] [2024-06-14 11:51:04,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:04,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:04,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:04,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:04,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:04,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:04,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 183 transitions, 2071 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:04,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:04,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:04,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:05,131 INFO L124 PetriNetUnfolderBase]: 2619/4169 cut-off events. [2024-06-14 11:51:05,131 INFO L125 PetriNetUnfolderBase]: For 143116/143118 co-relation queries the response was YES. [2024-06-14 11:51:05,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27343 conditions, 4169 events. 2619/4169 cut-off events. For 143116/143118 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 23686 event pairs, 635 based on Foata normal form. 4/4143 useless extension candidates. Maximal degree in co-relation 27273. Up to 3479 conditions per place. [2024-06-14 11:51:05,169 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 123 selfloop transitions, 92 changer transitions 0/220 dead transitions. [2024-06-14 11:51:05,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2685 flow [2024-06-14 11:51:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:51:05,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 11:51:05,170 INFO L175 Difference]: Start difference. First operand has 147 places, 183 transitions, 2071 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:51:05,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2685 flow [2024-06-14 11:51:05,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 220 transitions, 2473 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:05,314 INFO L231 Difference]: Finished difference. Result has 149 places, 189 transitions, 2142 flow [2024-06-14 11:51:05,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=149, PETRI_TRANSITIONS=189} [2024-06-14 11:51:05,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-14 11:51:05,315 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 189 transitions, 2142 flow [2024-06-14 11:51:05,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:05,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:05,315 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 11:51:05,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:51:05,316 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:05,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:05,316 INFO L85 PathProgramCache]: Analyzing trace with hash 532894054, now seen corresponding path program 2 times [2024-06-14 11:51:05,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:05,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936505415] [2024-06-14 11:51:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:05,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:06,245 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 11:51:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936505415] [2024-06-14 11:51:06,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936505415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:06,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:06,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194860633] [2024-06-14 11:51:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:06,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:06,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 189 transitions, 2142 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:06,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:06,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:06,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:07,232 INFO L124 PetriNetUnfolderBase]: 2654/4234 cut-off events. [2024-06-14 11:51:07,233 INFO L125 PetriNetUnfolderBase]: For 151448/151450 co-relation queries the response was YES. [2024-06-14 11:51:07,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28153 conditions, 4234 events. 2654/4234 cut-off events. For 151448/151450 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24177 event pairs, 626 based on Foata normal form. 4/4211 useless extension candidates. Maximal degree in co-relation 28081. Up to 3518 conditions per place. [2024-06-14 11:51:07,272 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 122 selfloop transitions, 112 changer transitions 0/239 dead transitions. [2024-06-14 11:51:07,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 239 transitions, 2958 flow [2024-06-14 11:51:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:51:07,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 11:51:07,274 INFO L175 Difference]: Start difference. First operand has 149 places, 189 transitions, 2142 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:51:07,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 239 transitions, 2958 flow [2024-06-14 11:51:07,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 239 transitions, 2708 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:07,466 INFO L231 Difference]: Finished difference. Result has 153 places, 208 transitions, 2395 flow [2024-06-14 11:51:07,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2395, PETRI_PLACES=153, PETRI_TRANSITIONS=208} [2024-06-14 11:51:07,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-14 11:51:07,467 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 208 transitions, 2395 flow [2024-06-14 11:51:07,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:07,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:07,467 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 11:51:07,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:51:07,468 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:07,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash 542417254, now seen corresponding path program 3 times [2024-06-14 11:51:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:07,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963868349] [2024-06-14 11:51:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:07,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:08,287 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 11:51:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963868349] [2024-06-14 11:51:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963868349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:08,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:08,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332315528] [2024-06-14 11:51:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:08,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:08,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:08,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 208 transitions, 2395 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:08,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:08,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:08,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:09,203 INFO L124 PetriNetUnfolderBase]: 2687/4302 cut-off events. [2024-06-14 11:51:09,203 INFO L125 PetriNetUnfolderBase]: For 157902/157904 co-relation queries the response was YES. [2024-06-14 11:51:09,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28839 conditions, 4302 events. 2687/4302 cut-off events. For 157902/157904 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24814 event pairs, 458 based on Foata normal form. 4/4278 useless extension candidates. Maximal degree in co-relation 28765. Up to 3354 conditions per place. [2024-06-14 11:51:09,243 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 124 selfloop transitions, 121 changer transitions 0/250 dead transitions. [2024-06-14 11:51:09,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 250 transitions, 3251 flow [2024-06-14 11:51:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 11:51:09,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-14 11:51:09,245 INFO L175 Difference]: Start difference. First operand has 153 places, 208 transitions, 2395 flow. Second operand 9 states and 182 transitions. [2024-06-14 11:51:09,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 250 transitions, 3251 flow [2024-06-14 11:51:09,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 250 transitions, 3037 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:09,471 INFO L231 Difference]: Finished difference. Result has 159 places, 213 transitions, 2571 flow [2024-06-14 11:51:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2571, PETRI_PLACES=159, PETRI_TRANSITIONS=213} [2024-06-14 11:51:09,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 11:51:09,472 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 213 transitions, 2571 flow [2024-06-14 11:51:09,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:09,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:09,472 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 11:51:09,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:51:09,473 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:09,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -807194940, now seen corresponding path program 4 times [2024-06-14 11:51:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5249857] [2024-06-14 11:51:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:10,332 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 11:51:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:10,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5249857] [2024-06-14 11:51:10,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5249857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:10,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:10,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:51:10,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454660396] [2024-06-14 11:51:10,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:51:10,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:10,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:51:10,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:51:10,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:10,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 213 transitions, 2571 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:10,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:10,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:10,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:11,389 INFO L124 PetriNetUnfolderBase]: 2679/4290 cut-off events. [2024-06-14 11:51:11,389 INFO L125 PetriNetUnfolderBase]: For 163137/163139 co-relation queries the response was YES. [2024-06-14 11:51:11,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28713 conditions, 4290 events. 2679/4290 cut-off events. For 163137/163139 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 24719 event pairs, 633 based on Foata normal form. 4/4266 useless extension candidates. Maximal degree in co-relation 28637. Up to 3565 conditions per place. [2024-06-14 11:51:11,430 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 128 selfloop transitions, 111 changer transitions 0/244 dead transitions. [2024-06-14 11:51:11,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 244 transitions, 3160 flow [2024-06-14 11:51:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:51:11,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-14 11:51:11,431 INFO L175 Difference]: Start difference. First operand has 159 places, 213 transitions, 2571 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:51:11,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 244 transitions, 3160 flow [2024-06-14 11:51:11,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 244 transitions, 2874 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:11,656 INFO L231 Difference]: Finished difference. Result has 163 places, 214 transitions, 2539 flow [2024-06-14 11:51:11,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2539, PETRI_PLACES=163, PETRI_TRANSITIONS=214} [2024-06-14 11:51:11,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 11:51:11,657 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 214 transitions, 2539 flow [2024-06-14 11:51:11,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 11:51:11,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:11,657 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 11:51:11,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:51:11,658 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:11,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash -475562333, now seen corresponding path program 2 times [2024-06-14 11:51:11,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701544782] [2024-06-14 11:51:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:12,649 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 11:51:12,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:12,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701544782] [2024-06-14 11:51:12,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701544782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:12,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:12,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:12,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629405526] [2024-06-14 11:51:12,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:12,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:12,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:12,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:12,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 214 transitions, 2539 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:12,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:12,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:12,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:13,384 INFO L124 PetriNetUnfolderBase]: 2560/4172 cut-off events. [2024-06-14 11:51:13,384 INFO L125 PetriNetUnfolderBase]: For 168438/168478 co-relation queries the response was YES. [2024-06-14 11:51:13,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27816 conditions, 4172 events. 2560/4172 cut-off events. For 168438/168478 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24735 event pairs, 616 based on Foata normal form. 25/4165 useless extension candidates. Maximal degree in co-relation 27738. Up to 3794 conditions per place. [2024-06-14 11:51:13,425 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 183 selfloop transitions, 30 changer transitions 0/234 dead transitions. [2024-06-14 11:51:13,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 234 transitions, 3193 flow [2024-06-14 11:51:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 11:51:13,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 11:51:13,426 INFO L175 Difference]: Start difference. First operand has 163 places, 214 transitions, 2539 flow. Second operand 7 states and 131 transitions. [2024-06-14 11:51:13,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 234 transitions, 3193 flow [2024-06-14 11:51:13,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 234 transitions, 2953 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:13,637 INFO L231 Difference]: Finished difference. Result has 165 places, 222 transitions, 2494 flow [2024-06-14 11:51:13,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2494, PETRI_PLACES=165, PETRI_TRANSITIONS=222} [2024-06-14 11:51:13,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 11:51:13,638 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 222 transitions, 2494 flow [2024-06-14 11:51:13,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:13,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:13,638 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 11:51:13,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:51:13,639 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:13,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1099950281, now seen corresponding path program 3 times [2024-06-14 11:51:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:13,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317438725] [2024-06-14 11:51:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:14,461 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 11:51:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317438725] [2024-06-14 11:51:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317438725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:14,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:14,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209619900] [2024-06-14 11:51:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:14,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:14,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:14,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:14,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 222 transitions, 2494 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:14,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:14,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:14,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:15,188 INFO L124 PetriNetUnfolderBase]: 2557/4178 cut-off events. [2024-06-14 11:51:15,188 INFO L125 PetriNetUnfolderBase]: For 174925/174965 co-relation queries the response was YES. [2024-06-14 11:51:15,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27714 conditions, 4178 events. 2557/4178 cut-off events. For 174925/174965 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24901 event pairs, 626 based on Foata normal form. 25/4171 useless extension candidates. Maximal degree in co-relation 27634. Up to 3800 conditions per place. [2024-06-14 11:51:15,226 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 190 selfloop transitions, 23 changer transitions 0/234 dead transitions. [2024-06-14 11:51:15,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 234 transitions, 2967 flow [2024-06-14 11:51:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 11:51:15,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:51:15,228 INFO L175 Difference]: Start difference. First operand has 165 places, 222 transitions, 2494 flow. Second operand 7 states and 129 transitions. [2024-06-14 11:51:15,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 234 transitions, 2967 flow [2024-06-14 11:51:15,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 234 transitions, 2863 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:15,489 INFO L231 Difference]: Finished difference. Result has 169 places, 223 transitions, 2451 flow [2024-06-14 11:51:15,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2451, PETRI_PLACES=169, PETRI_TRANSITIONS=223} [2024-06-14 11:51:15,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 11:51:15,490 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 223 transitions, 2451 flow [2024-06-14 11:51:15,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:15,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:15,491 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 11:51:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:51:15,491 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:15,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:15,491 INFO L85 PathProgramCache]: Analyzing trace with hash -478386790, now seen corresponding path program 3 times [2024-06-14 11:51:15,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396721467] [2024-06-14 11:51:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:16,247 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 11:51:16,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:16,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396721467] [2024-06-14 11:51:16,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396721467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:16,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:16,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:16,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922000631] [2024-06-14 11:51:16,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:16,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:16,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:16,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:16,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 223 transitions, 2451 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:16,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:16,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:16,980 INFO L124 PetriNetUnfolderBase]: 2685/4347 cut-off events. [2024-06-14 11:51:16,981 INFO L125 PetriNetUnfolderBase]: For 181952/181957 co-relation queries the response was YES. [2024-06-14 11:51:17,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28815 conditions, 4347 events. 2685/4347 cut-off events. For 181952/181957 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25468 event pairs, 652 based on Foata normal form. 4/4335 useless extension candidates. Maximal degree in co-relation 28733. Up to 3852 conditions per place. [2024-06-14 11:51:17,022 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 59 changer transitions 0/244 dead transitions. [2024-06-14 11:51:17,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 244 transitions, 3287 flow [2024-06-14 11:51:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:51:17,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 11:51:17,023 INFO L175 Difference]: Start difference. First operand has 169 places, 223 transitions, 2451 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:51:17,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 244 transitions, 3287 flow [2024-06-14 11:51:17,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 244 transitions, 3237 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:17,247 INFO L231 Difference]: Finished difference. Result has 172 places, 231 transitions, 2681 flow [2024-06-14 11:51:17,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2681, PETRI_PLACES=172, PETRI_TRANSITIONS=231} [2024-06-14 11:51:17,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 11:51:17,247 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 231 transitions, 2681 flow [2024-06-14 11:51:17,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:17,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:17,248 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 11:51:17,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:51:17,248 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:17,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:17,249 INFO L85 PathProgramCache]: Analyzing trace with hash 849137680, now seen corresponding path program 4 times [2024-06-14 11:51:17,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:17,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174951417] [2024-06-14 11:51:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:17,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:17,934 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 11:51:17,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:17,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174951417] [2024-06-14 11:51:17,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174951417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:17,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:17,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23315824] [2024-06-14 11:51:17,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:17,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:17,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:17,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:17,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 231 transitions, 2681 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:17,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:17,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:17,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:18,731 INFO L124 PetriNetUnfolderBase]: 2738/4435 cut-off events. [2024-06-14 11:51:18,731 INFO L125 PetriNetUnfolderBase]: For 194194/194205 co-relation queries the response was YES. [2024-06-14 11:51:18,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30353 conditions, 4435 events. 2738/4435 cut-off events. For 194194/194205 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26019 event pairs, 624 based on Foata normal form. 12/4444 useless extension candidates. Maximal degree in co-relation 30269. Up to 3991 conditions per place. [2024-06-14 11:51:18,773 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 62 changer transitions 0/274 dead transitions. [2024-06-14 11:51:18,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 3539 flow [2024-06-14 11:51:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:51:18,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 11:51:18,775 INFO L175 Difference]: Start difference. First operand has 172 places, 231 transitions, 2681 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:51:18,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 3539 flow [2024-06-14 11:51:19,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 274 transitions, 3339 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:19,059 INFO L231 Difference]: Finished difference. Result has 177 places, 250 transitions, 2906 flow [2024-06-14 11:51:19,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2906, PETRI_PLACES=177, PETRI_TRANSITIONS=250} [2024-06-14 11:51:19,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 11:51:19,059 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 250 transitions, 2906 flow [2024-06-14 11:51:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:19,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:19,060 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 11:51:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:51:19,060 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:19,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1021190768, now seen corresponding path program 5 times [2024-06-14 11:51:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:19,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805376670] [2024-06-14 11:51:19,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:19,770 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 11:51:19,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:19,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805376670] [2024-06-14 11:51:19,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805376670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:19,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:19,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:19,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209361361] [2024-06-14 11:51:19,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:19,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:19,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:19,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 250 transitions, 2906 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:19,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:19,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:19,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:20,572 INFO L124 PetriNetUnfolderBase]: 2762/4479 cut-off events. [2024-06-14 11:51:20,573 INFO L125 PetriNetUnfolderBase]: For 200914/200919 co-relation queries the response was YES. [2024-06-14 11:51:20,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30680 conditions, 4479 events. 2762/4479 cut-off events. For 200914/200919 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26394 event pairs, 624 based on Foata normal form. 6/4482 useless extension candidates. Maximal degree in co-relation 30594. Up to 4014 conditions per place. [2024-06-14 11:51:20,620 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 218 selfloop transitions, 70 changer transitions 0/293 dead transitions. [2024-06-14 11:51:20,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 293 transitions, 3874 flow [2024-06-14 11:51:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:51:20,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 11:51:20,622 INFO L175 Difference]: Start difference. First operand has 177 places, 250 transitions, 2906 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:51:20,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 293 transitions, 3874 flow [2024-06-14 11:51:20,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 293 transitions, 3670 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:20,921 INFO L231 Difference]: Finished difference. Result has 183 places, 272 transitions, 3285 flow [2024-06-14 11:51:20,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3285, PETRI_PLACES=183, PETRI_TRANSITIONS=272} [2024-06-14 11:51:20,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 11:51:20,922 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 272 transitions, 3285 flow [2024-06-14 11:51:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:20,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:20,922 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 11:51:20,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:51:20,923 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:20,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1740341642, now seen corresponding path program 1 times [2024-06-14 11:51:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:20,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705792032] [2024-06-14 11:51:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:20,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:21,625 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 11:51:21,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:21,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705792032] [2024-06-14 11:51:21,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705792032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:21,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:21,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:21,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894348114] [2024-06-14 11:51:21,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:21,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:21,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:21,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:21,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 272 transitions, 3285 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:21,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:21,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:21,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:22,517 INFO L124 PetriNetUnfolderBase]: 2668/4386 cut-off events. [2024-06-14 11:51:22,517 INFO L125 PetriNetUnfolderBase]: For 210881/210881 co-relation queries the response was YES. [2024-06-14 11:51:22,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30733 conditions, 4386 events. 2668/4386 cut-off events. For 210881/210881 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26195 event pairs, 653 based on Foata normal form. 2/4386 useless extension candidates. Maximal degree in co-relation 30643. Up to 4007 conditions per place. [2024-06-14 11:51:22,560 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 266 selfloop transitions, 15 changer transitions 0/291 dead transitions. [2024-06-14 11:51:22,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 291 transitions, 3941 flow [2024-06-14 11:51:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:51:22,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 11:51:22,561 INFO L175 Difference]: Start difference. First operand has 183 places, 272 transitions, 3285 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:51:22,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 291 transitions, 3941 flow [2024-06-14 11:51:22,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 291 transitions, 3842 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:22,839 INFO L231 Difference]: Finished difference. Result has 187 places, 275 transitions, 3268 flow [2024-06-14 11:51:22,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=187, PETRI_TRANSITIONS=275} [2024-06-14 11:51:22,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 11:51:22,839 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 275 transitions, 3268 flow [2024-06-14 11:51:22,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:22,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:22,840 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 11:51:22,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:51:22,840 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:22,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1012545240, now seen corresponding path program 2 times [2024-06-14 11:51:22,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:22,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256195919] [2024-06-14 11:51:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:22,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:23,561 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 11:51:23,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256195919] [2024-06-14 11:51:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256195919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:23,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:23,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:23,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536117879] [2024-06-14 11:51:23,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:23,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:23,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:23,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:23,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 275 transitions, 3268 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:23,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:23,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:23,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:24,375 INFO L124 PetriNetUnfolderBase]: 2678/4392 cut-off events. [2024-06-14 11:51:24,375 INFO L125 PetriNetUnfolderBase]: For 219253/219253 co-relation queries the response was YES. [2024-06-14 11:51:24,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31146 conditions, 4392 events. 2678/4392 cut-off events. For 219253/219253 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26163 event pairs, 643 based on Foata normal form. 2/4392 useless extension candidates. Maximal degree in co-relation 31055. Up to 4012 conditions per place. [2024-06-14 11:51:24,421 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 262 selfloop transitions, 20 changer transitions 0/292 dead transitions. [2024-06-14 11:51:24,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 292 transitions, 3924 flow [2024-06-14 11:51:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:51:24,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 11:51:24,422 INFO L175 Difference]: Start difference. First operand has 187 places, 275 transitions, 3268 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:51:24,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 292 transitions, 3924 flow [2024-06-14 11:51:24,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 292 transitions, 3864 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:24,695 INFO L231 Difference]: Finished difference. Result has 189 places, 278 transitions, 3306 flow [2024-06-14 11:51:24,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3306, PETRI_PLACES=189, PETRI_TRANSITIONS=278} [2024-06-14 11:51:24,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 11:51:24,696 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 278 transitions, 3306 flow [2024-06-14 11:51:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:24,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:24,696 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 11:51:24,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:51:24,697 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:24,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:24,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1012545023, now seen corresponding path program 1 times [2024-06-14 11:51:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:24,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884324109] [2024-06-14 11:51:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:25,543 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 11:51:25,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:25,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884324109] [2024-06-14 11:51:25,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884324109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:25,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:25,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339396112] [2024-06-14 11:51:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:25,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:25,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:25,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 278 transitions, 3306 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:25,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:25,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:25,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:26,422 INFO L124 PetriNetUnfolderBase]: 2683/4401 cut-off events. [2024-06-14 11:51:26,422 INFO L125 PetriNetUnfolderBase]: For 228438/228438 co-relation queries the response was YES. [2024-06-14 11:51:26,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31671 conditions, 4401 events. 2683/4401 cut-off events. For 228438/228438 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26222 event pairs, 642 based on Foata normal form. 2/4401 useless extension candidates. Maximal degree in co-relation 31579. Up to 4037 conditions per place. [2024-06-14 11:51:26,467 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 268 selfloop transitions, 15 changer transitions 0/293 dead transitions. [2024-06-14 11:51:26,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 293 transitions, 3950 flow [2024-06-14 11:51:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 11:51:26,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 11:51:26,469 INFO L175 Difference]: Start difference. First operand has 189 places, 278 transitions, 3306 flow. Second operand 7 states and 130 transitions. [2024-06-14 11:51:26,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 293 transitions, 3950 flow [2024-06-14 11:51:26,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 293 transitions, 3874 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:26,969 INFO L231 Difference]: Finished difference. Result has 191 places, 281 transitions, 3312 flow [2024-06-14 11:51:26,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3230, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3312, PETRI_PLACES=191, PETRI_TRANSITIONS=281} [2024-06-14 11:51:26,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 11:51:26,970 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 281 transitions, 3312 flow [2024-06-14 11:51:26,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:26,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:26,971 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 11:51:26,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:51:26,971 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -475556381, now seen corresponding path program 2 times [2024-06-14 11:51:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:26,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041074900] [2024-06-14 11:51:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:26,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:27,776 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 11:51:27,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:27,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041074900] [2024-06-14 11:51:27,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041074900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:27,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:27,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:27,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106720776] [2024-06-14 11:51:27,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:27,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:27,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:27,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:27,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:27,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 281 transitions, 3312 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:27,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:27,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:27,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:28,609 INFO L124 PetriNetUnfolderBase]: 2693/4428 cut-off events. [2024-06-14 11:51:28,609 INFO L125 PetriNetUnfolderBase]: For 237682/237685 co-relation queries the response was YES. [2024-06-14 11:51:28,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32139 conditions, 4428 events. 2693/4428 cut-off events. For 237682/237685 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26498 event pairs, 655 based on Foata normal form. 5/4430 useless extension candidates. Maximal degree in co-relation 32046. Up to 4017 conditions per place. [2024-06-14 11:51:28,649 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 260 selfloop transitions, 29 changer transitions 0/299 dead transitions. [2024-06-14 11:51:28,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 299 transitions, 4112 flow [2024-06-14 11:51:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:51:28,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:51:28,655 INFO L175 Difference]: Start difference. First operand has 191 places, 281 transitions, 3312 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:51:28,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 299 transitions, 4112 flow [2024-06-14 11:51:28,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 299 transitions, 4052 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:28,954 INFO L231 Difference]: Finished difference. Result has 193 places, 287 transitions, 3415 flow [2024-06-14 11:51:28,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3415, PETRI_PLACES=193, PETRI_TRANSITIONS=287} [2024-06-14 11:51:28,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-14 11:51:28,955 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 287 transitions, 3415 flow [2024-06-14 11:51:28,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:28,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:28,955 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 11:51:28,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:51:28,956 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:28,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash -475823508, now seen corresponding path program 3 times [2024-06-14 11:51:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:28,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143455411] [2024-06-14 11:51:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:29,607 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 11:51:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:29,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143455411] [2024-06-14 11:51:29,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143455411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:29,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:29,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999920826] [2024-06-14 11:51:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:29,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:29,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:29,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:29,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:29,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 287 transitions, 3415 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:29,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:29,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:29,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:30,474 INFO L124 PetriNetUnfolderBase]: 2700/4439 cut-off events. [2024-06-14 11:51:30,475 INFO L125 PetriNetUnfolderBase]: For 245620/245623 co-relation queries the response was YES. [2024-06-14 11:51:30,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32617 conditions, 4439 events. 2700/4439 cut-off events. For 245620/245623 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26539 event pairs, 662 based on Foata normal form. 4/4439 useless extension candidates. Maximal degree in co-relation 32523. Up to 4029 conditions per place. [2024-06-14 11:51:30,517 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 264 selfloop transitions, 27 changer transitions 0/301 dead transitions. [2024-06-14 11:51:30,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 301 transitions, 4087 flow [2024-06-14 11:51:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:30,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:51:30,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:51:30,519 INFO L175 Difference]: Start difference. First operand has 193 places, 287 transitions, 3415 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:51:30,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 301 transitions, 4087 flow [2024-06-14 11:51:30,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 301 transitions, 4013 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:30,893 INFO L231 Difference]: Finished difference. Result has 196 places, 290 transitions, 3463 flow [2024-06-14 11:51:30,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3463, PETRI_PLACES=196, PETRI_TRANSITIONS=290} [2024-06-14 11:51:30,894 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 11:51:30,894 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 290 transitions, 3463 flow [2024-06-14 11:51:30,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:30,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:30,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:30,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:51:30,895 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:30,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:30,895 INFO L85 PathProgramCache]: Analyzing trace with hash -475823291, now seen corresponding path program 3 times [2024-06-14 11:51:30,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847173799] [2024-06-14 11:51:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:30,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:31,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:31,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847173799] [2024-06-14 11:51:31,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847173799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:31,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:31,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:31,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674636556] [2024-06-14 11:51:31,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:31,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:31,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:31,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:31,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:31,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 290 transitions, 3463 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:31,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:31,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:31,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:32,709 INFO L124 PetriNetUnfolderBase]: 2694/4420 cut-off events. [2024-06-14 11:51:32,709 INFO L125 PetriNetUnfolderBase]: For 251196/251199 co-relation queries the response was YES. [2024-06-14 11:51:32,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32804 conditions, 4420 events. 2694/4420 cut-off events. For 251196/251199 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26383 event pairs, 647 based on Foata normal form. 4/4421 useless extension candidates. Maximal degree in co-relation 32709. Up to 4046 conditions per place. [2024-06-14 11:51:32,755 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 272 selfloop transitions, 20 changer transitions 0/302 dead transitions. [2024-06-14 11:51:32,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 302 transitions, 4115 flow [2024-06-14 11:51:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 11:51:32,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:51:32,774 INFO L175 Difference]: Start difference. First operand has 196 places, 290 transitions, 3463 flow. Second operand 7 states and 129 transitions. [2024-06-14 11:51:32,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 302 transitions, 4115 flow [2024-06-14 11:51:33,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 302 transitions, 4017 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:33,103 INFO L231 Difference]: Finished difference. Result has 198 places, 293 transitions, 3459 flow [2024-06-14 11:51:33,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3459, PETRI_PLACES=198, PETRI_TRANSITIONS=293} [2024-06-14 11:51:33,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-14 11:51:33,104 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 293 transitions, 3459 flow [2024-06-14 11:51:33,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 11:51:33,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:33,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:33,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:51:33,105 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:33,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 106362507, now seen corresponding path program 1 times [2024-06-14 11:51:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:33,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46959249] [2024-06-14 11:51:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:33,830 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 11:51:33,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:33,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46959249] [2024-06-14 11:51:33,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46959249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:33,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:33,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511585906] [2024-06-14 11:51:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:33,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:33,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:33,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:33,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 293 transitions, 3459 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:33,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:34,775 INFO L124 PetriNetUnfolderBase]: 2813/4544 cut-off events. [2024-06-14 11:51:34,776 INFO L125 PetriNetUnfolderBase]: For 257958/257961 co-relation queries the response was YES. [2024-06-14 11:51:34,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33739 conditions, 4544 events. 2813/4544 cut-off events. For 257958/257961 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 26713 event pairs, 630 based on Foata normal form. 4/4545 useless extension candidates. Maximal degree in co-relation 33643. Up to 4086 conditions per place. [2024-06-14 11:51:34,824 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 249 selfloop transitions, 61 changer transitions 0/315 dead transitions. [2024-06-14 11:51:34,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 315 transitions, 4214 flow [2024-06-14 11:51:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 11:51:34,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-14 11:51:34,825 INFO L175 Difference]: Start difference. First operand has 198 places, 293 transitions, 3459 flow. Second operand 7 states and 135 transitions. [2024-06-14 11:51:34,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 315 transitions, 4214 flow [2024-06-14 11:51:35,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 315 transitions, 4146 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:35,182 INFO L231 Difference]: Finished difference. Result has 200 places, 297 transitions, 3598 flow [2024-06-14 11:51:35,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3598, PETRI_PLACES=200, PETRI_TRANSITIONS=297} [2024-06-14 11:51:35,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 11:51:35,191 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 297 transitions, 3598 flow [2024-06-14 11:51:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:35,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:35,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:35,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:51:35,192 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:35,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:35,192 INFO L85 PathProgramCache]: Analyzing trace with hash -883779287, now seen corresponding path program 2 times [2024-06-14 11:51:35,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:35,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385205271] [2024-06-14 11:51:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:35,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:35,860 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 11:51:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:35,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385205271] [2024-06-14 11:51:35,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385205271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:35,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:35,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:35,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233169135] [2024-06-14 11:51:35,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:35,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:35,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:35,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 297 transitions, 3598 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:35,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:35,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:35,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:36,791 INFO L124 PetriNetUnfolderBase]: 2815/4546 cut-off events. [2024-06-14 11:51:36,791 INFO L125 PetriNetUnfolderBase]: For 266862/266865 co-relation queries the response was YES. [2024-06-14 11:51:36,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34087 conditions, 4546 events. 2815/4546 cut-off events. For 266862/266865 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 26725 event pairs, 632 based on Foata normal form. 4/4547 useless extension candidates. Maximal degree in co-relation 33990. Up to 4014 conditions per place. [2024-06-14 11:51:36,841 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 227 selfloop transitions, 83 changer transitions 0/315 dead transitions. [2024-06-14 11:51:36,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 315 transitions, 4428 flow [2024-06-14 11:51:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 11:51:36,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 11:51:36,843 INFO L175 Difference]: Start difference. First operand has 200 places, 297 transitions, 3598 flow. Second operand 7 states and 134 transitions. [2024-06-14 11:51:36,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 315 transitions, 4428 flow [2024-06-14 11:51:37,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 315 transitions, 4268 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:37,318 INFO L231 Difference]: Finished difference. Result has 202 places, 300 transitions, 3682 flow [2024-06-14 11:51:37,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3682, PETRI_PLACES=202, PETRI_TRANSITIONS=300} [2024-06-14 11:51:37,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-14 11:51:37,319 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 300 transitions, 3682 flow [2024-06-14 11:51:37,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:37,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:37,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:37,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:51:37,319 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:37,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:37,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1755934300, now seen corresponding path program 1 times [2024-06-14 11:51:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:37,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727873532] [2024-06-14 11:51:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:38,437 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 11:51:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727873532] [2024-06-14 11:51:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727873532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:38,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:38,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:38,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627867326] [2024-06-14 11:51:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:38,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:38,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:38,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 300 transitions, 3682 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:38,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:38,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:38,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:39,782 INFO L124 PetriNetUnfolderBase]: 2897/4683 cut-off events. [2024-06-14 11:51:39,782 INFO L125 PetriNetUnfolderBase]: For 286971/286974 co-relation queries the response was YES. [2024-06-14 11:51:39,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34944 conditions, 4683 events. 2897/4683 cut-off events. For 286971/286974 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27721 event pairs, 579 based on Foata normal form. 12/4690 useless extension candidates. Maximal degree in co-relation 34846. Up to 3587 conditions per place. [2024-06-14 11:51:39,833 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 123 changer transitions 0/360 dead transitions. [2024-06-14 11:51:39,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 360 transitions, 4717 flow [2024-06-14 11:51:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:51:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:51:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-14 11:51:39,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45155038759689925 [2024-06-14 11:51:39,843 INFO L175 Difference]: Start difference. First operand has 202 places, 300 transitions, 3682 flow. Second operand 12 states and 233 transitions. [2024-06-14 11:51:39,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 360 transitions, 4717 flow [2024-06-14 11:51:40,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 360 transitions, 4559 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:40,353 INFO L231 Difference]: Finished difference. Result has 212 places, 307 transitions, 3893 flow [2024-06-14 11:51:40,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3893, PETRI_PLACES=212, PETRI_TRANSITIONS=307} [2024-06-14 11:51:40,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 11:51:40,354 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 307 transitions, 3893 flow [2024-06-14 11:51:40,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:40,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:40,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:40,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:51:40,355 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:40,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -893959873, now seen corresponding path program 1 times [2024-06-14 11:51:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:40,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666175408] [2024-06-14 11:51:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:41,202 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 11:51:41,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:41,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666175408] [2024-06-14 11:51:41,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666175408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:41,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:41,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487976202] [2024-06-14 11:51:41,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:41,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:41,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:41,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 307 transitions, 3893 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:51:41,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:41,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:41,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:42,264 INFO L124 PetriNetUnfolderBase]: 2907/4719 cut-off events. [2024-06-14 11:51:42,264 INFO L125 PetriNetUnfolderBase]: For 289959/289964 co-relation queries the response was YES. [2024-06-14 11:51:42,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35865 conditions, 4719 events. 2907/4719 cut-off events. For 289959/289964 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28122 event pairs, 634 based on Foata normal form. 6/4722 useless extension candidates. Maximal degree in co-relation 35764. Up to 4206 conditions per place. [2024-06-14 11:51:42,309 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 238 selfloop transitions, 88 changer transitions 0/331 dead transitions. [2024-06-14 11:51:42,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 331 transitions, 4677 flow [2024-06-14 11:51:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:51:42,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:51:42,311 INFO L175 Difference]: Start difference. First operand has 212 places, 307 transitions, 3893 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:51:42,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 331 transitions, 4677 flow [2024-06-14 11:51:42,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 331 transitions, 4369 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-14 11:51:42,807 INFO L231 Difference]: Finished difference. Result has 209 places, 311 transitions, 3849 flow [2024-06-14 11:51:42,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3849, PETRI_PLACES=209, PETRI_TRANSITIONS=311} [2024-06-14 11:51:42,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 11:51:42,808 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 311 transitions, 3849 flow [2024-06-14 11:51:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:51:42,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:42,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:42,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:51:42,809 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:42,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash -605364623, now seen corresponding path program 2 times [2024-06-14 11:51:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:42,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974600884] [2024-06-14 11:51:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:42,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:43,727 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 11:51:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974600884] [2024-06-14 11:51:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974600884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:43,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:43,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794106484] [2024-06-14 11:51:43,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:43,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:43,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 311 transitions, 3849 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:51:43,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:43,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:43,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:44,848 INFO L124 PetriNetUnfolderBase]: 2943/4779 cut-off events. [2024-06-14 11:51:44,849 INFO L125 PetriNetUnfolderBase]: For 302543/302546 co-relation queries the response was YES. [2024-06-14 11:51:44,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36527 conditions, 4779 events. 2943/4779 cut-off events. For 302543/302546 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28596 event pairs, 661 based on Foata normal form. 4/4780 useless extension candidates. Maximal degree in co-relation 36428. Up to 4155 conditions per place. [2024-06-14 11:51:44,905 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 245 selfloop transitions, 87 changer transitions 0/337 dead transitions. [2024-06-14 11:51:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 337 transitions, 4957 flow [2024-06-14 11:51:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:51:44,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 11:51:44,906 INFO L175 Difference]: Start difference. First operand has 209 places, 311 transitions, 3849 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:51:44,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 337 transitions, 4957 flow [2024-06-14 11:51:45,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 337 transitions, 4731 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:45,521 INFO L231 Difference]: Finished difference. Result has 212 places, 319 transitions, 3980 flow [2024-06-14 11:51:45,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3980, PETRI_PLACES=212, PETRI_TRANSITIONS=319} [2024-06-14 11:51:45,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 11:51:45,522 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 319 transitions, 3980 flow [2024-06-14 11:51:45,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:51:45,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:45,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:45,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:51:45,523 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:45,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:45,523 INFO L85 PathProgramCache]: Analyzing trace with hash -883770359, now seen corresponding path program 1 times [2024-06-14 11:51:45,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:45,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516532579] [2024-06-14 11:51:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:46,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516532579] [2024-06-14 11:51:46,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516532579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:46,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:46,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304831157] [2024-06-14 11:51:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:46,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:46,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:51:46,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 319 transitions, 3980 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:46,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:46,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:51:46,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:47,716 INFO L124 PetriNetUnfolderBase]: 2860/4667 cut-off events. [2024-06-14 11:51:47,716 INFO L125 PetriNetUnfolderBase]: For 315292/315299 co-relation queries the response was YES. [2024-06-14 11:51:47,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36583 conditions, 4667 events. 2860/4667 cut-off events. For 315292/315299 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 28214 event pairs, 660 based on Foata normal form. 8/4640 useless extension candidates. Maximal degree in co-relation 36482. Up to 4181 conditions per place. [2024-06-14 11:51:47,773 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 24 changer transitions 0/338 dead transitions. [2024-06-14 11:51:47,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 338 transitions, 4702 flow [2024-06-14 11:51:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:51:47,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:51:47,774 INFO L175 Difference]: Start difference. First operand has 212 places, 319 transitions, 3980 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:51:47,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 338 transitions, 4702 flow [2024-06-14 11:51:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 338 transitions, 4521 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:48,251 INFO L231 Difference]: Finished difference. Result has 216 places, 322 transitions, 3929 flow [2024-06-14 11:51:48,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3929, PETRI_PLACES=216, PETRI_TRANSITIONS=322} [2024-06-14 11:51:48,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 11:51:48,252 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 322 transitions, 3929 flow [2024-06-14 11:51:48,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:48,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:48,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:48,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:51:48,253 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:48,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash -883782883, now seen corresponding path program 3 times [2024-06-14 11:51:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82089421] [2024-06-14 11:51:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:49,255 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 11:51:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:49,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82089421] [2024-06-14 11:51:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82089421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:49,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:49,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284299943] [2024-06-14 11:51:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:49,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:49,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:49,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:49,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 322 transitions, 3929 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:51:49,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:49,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:49,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:50,285 INFO L124 PetriNetUnfolderBase]: 2952/4792 cut-off events. [2024-06-14 11:51:50,286 INFO L125 PetriNetUnfolderBase]: For 320498/320501 co-relation queries the response was YES. [2024-06-14 11:51:50,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37607 conditions, 4792 events. 2952/4792 cut-off events. For 320498/320501 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28612 event pairs, 662 based on Foata normal form. 4/4793 useless extension candidates. Maximal degree in co-relation 37504. Up to 4226 conditions per place. [2024-06-14 11:51:50,341 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 254 selfloop transitions, 83 changer transitions 0/342 dead transitions. [2024-06-14 11:51:50,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 342 transitions, 4838 flow [2024-06-14 11:51:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:51:50,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:51:50,342 INFO L175 Difference]: Start difference. First operand has 216 places, 322 transitions, 3929 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:51:50,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 342 transitions, 4838 flow [2024-06-14 11:51:51,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 342 transitions, 4730 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:51,087 INFO L231 Difference]: Finished difference. Result has 218 places, 326 transitions, 4077 flow [2024-06-14 11:51:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4077, PETRI_PLACES=218, PETRI_TRANSITIONS=326} [2024-06-14 11:51:51,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 11:51:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 326 transitions, 4077 flow [2024-06-14 11:51:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:51:51,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:51,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:51:51,088 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:51,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1891729111, now seen corresponding path program 3 times [2024-06-14 11:51:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:51,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052709809] [2024-06-14 11:51:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:51,783 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 11:51:51,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:51,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052709809] [2024-06-14 11:51:51,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052709809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:51,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:51,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134640281] [2024-06-14 11:51:51,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:51,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:51,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:51,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:51,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:51,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 326 transitions, 4077 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:51,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:51,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:51,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:52,831 INFO L124 PetriNetUnfolderBase]: 2945/4769 cut-off events. [2024-06-14 11:51:52,831 INFO L125 PetriNetUnfolderBase]: For 328627/328627 co-relation queries the response was YES. [2024-06-14 11:51:52,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37914 conditions, 4769 events. 2945/4769 cut-off events. For 328627/328627 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28356 event pairs, 678 based on Foata normal form. 1/4755 useless extension candidates. Maximal degree in co-relation 37810. Up to 4311 conditions per place. [2024-06-14 11:51:52,888 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 61 changer transitions 0/342 dead transitions. [2024-06-14 11:51:52,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 342 transitions, 4819 flow [2024-06-14 11:51:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:51:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:51:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:51:52,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 11:51:52,889 INFO L175 Difference]: Start difference. First operand has 218 places, 326 transitions, 4077 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:51:52,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 342 transitions, 4819 flow [2024-06-14 11:51:53,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 342 transitions, 4622 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:53,323 INFO L231 Difference]: Finished difference. Result has 220 places, 326 transitions, 4009 flow [2024-06-14 11:51:53,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4009, PETRI_PLACES=220, PETRI_TRANSITIONS=326} [2024-06-14 11:51:53,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 11:51:53,324 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 326 transitions, 4009 flow [2024-06-14 11:51:53,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:53,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:53,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:53,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:51:53,324 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:53,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:53,325 INFO L85 PathProgramCache]: Analyzing trace with hash 318044457, now seen corresponding path program 4 times [2024-06-14 11:51:53,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:53,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650833007] [2024-06-14 11:51:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:53,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:54,152 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 11:51:54,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:54,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650833007] [2024-06-14 11:51:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650833007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:54,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:54,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:54,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781828688] [2024-06-14 11:51:54,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:54,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:54,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:54,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:54,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 326 transitions, 4009 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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 11:51:54,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:54,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:54,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:55,201 INFO L124 PetriNetUnfolderBase]: 2950/4776 cut-off events. [2024-06-14 11:51:55,202 INFO L125 PetriNetUnfolderBase]: For 338385/338385 co-relation queries the response was YES. [2024-06-14 11:51:55,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38082 conditions, 4776 events. 2950/4776 cut-off events. For 338385/338385 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28397 event pairs, 676 based on Foata normal form. 1/4762 useless extension candidates. Maximal degree in co-relation 37977. Up to 4294 conditions per place. [2024-06-14 11:51:55,250 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 264 selfloop transitions, 73 changer transitions 0/342 dead transitions. [2024-06-14 11:51:55,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 342 transitions, 4787 flow [2024-06-14 11:51:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:51:55,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:51:55,252 INFO L175 Difference]: Start difference. First operand has 220 places, 326 transitions, 4009 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:51:55,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 342 transitions, 4787 flow [2024-06-14 11:51:55,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 342 transitions, 4504 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 11:51:55,809 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 3938 flow [2024-06-14 11:51:55,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3938, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2024-06-14 11:51:55,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 11:51:55,810 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 3938 flow [2024-06-14 11:51:55,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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 11:51:55,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:55,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:55,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:51:55,811 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:55,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash 8593362, now seen corresponding path program 2 times [2024-06-14 11:51:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:55,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314386668] [2024-06-14 11:51:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:56,752 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 11:51:56,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:56,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314386668] [2024-06-14 11:51:56,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314386668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:56,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:56,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120462271] [2024-06-14 11:51:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:56,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:56,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:56,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:56,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 3938 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:56,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:56,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:56,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:58,209 INFO L124 PetriNetUnfolderBase]: 3032/4919 cut-off events. [2024-06-14 11:51:58,209 INFO L125 PetriNetUnfolderBase]: For 362142/362142 co-relation queries the response was YES. [2024-06-14 11:51:58,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38846 conditions, 4919 events. 3032/4919 cut-off events. For 362142/362142 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29510 event pairs, 669 based on Foata normal form. 12/4907 useless extension candidates. Maximal degree in co-relation 38740. Up to 3920 conditions per place. [2024-06-14 11:51:58,262 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 249 selfloop transitions, 131 changer transitions 0/385 dead transitions. [2024-06-14 11:51:58,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 385 transitions, 5033 flow [2024-06-14 11:51:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:51:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:51:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-14 11:51:58,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 11:51:58,264 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 3938 flow. Second operand 12 states and 231 transitions. [2024-06-14 11:51:58,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 385 transitions, 5033 flow [2024-06-14 11:51:58,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 385 transitions, 4892 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 11:51:58,817 INFO L231 Difference]: Finished difference. Result has 229 places, 336 transitions, 4181 flow [2024-06-14 11:51:58,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4181, PETRI_PLACES=229, PETRI_TRANSITIONS=336} [2024-06-14 11:51:58,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 11:51:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 336 transitions, 4181 flow [2024-06-14 11:51:58,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:58,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:58,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:51:58,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:51:58,819 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:58,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash -21733584, now seen corresponding path program 3 times [2024-06-14 11:51:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:58,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324899557] [2024-06-14 11:51:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:59,832 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 11:51:59,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:59,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324899557] [2024-06-14 11:51:59,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324899557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:59,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:59,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:59,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044141391] [2024-06-14 11:51:59,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:59,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:59,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:59,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:51:59,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 336 transitions, 4181 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:51:59,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:59,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:51:59,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:01,353 INFO L124 PetriNetUnfolderBase]: 3149/5149 cut-off events. [2024-06-14 11:52:01,353 INFO L125 PetriNetUnfolderBase]: For 379259/379259 co-relation queries the response was YES. [2024-06-14 11:52:01,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40740 conditions, 5149 events. 3149/5149 cut-off events. For 379259/379259 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31493 event pairs, 682 based on Foata normal form. 12/5146 useless extension candidates. Maximal degree in co-relation 40631. Up to 4109 conditions per place. [2024-06-14 11:52:01,407 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 252 selfloop transitions, 141 changer transitions 0/398 dead transitions. [2024-06-14 11:52:01,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 398 transitions, 5350 flow [2024-06-14 11:52:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:52:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:52:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-14 11:52:01,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472271914132379 [2024-06-14 11:52:01,408 INFO L175 Difference]: Start difference. First operand has 229 places, 336 transitions, 4181 flow. Second operand 13 states and 250 transitions. [2024-06-14 11:52:01,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 398 transitions, 5350 flow [2024-06-14 11:52:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 398 transitions, 5059 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 11:52:02,109 INFO L231 Difference]: Finished difference. Result has 236 places, 345 transitions, 4335 flow [2024-06-14 11:52:02,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4335, PETRI_PLACES=236, PETRI_TRANSITIONS=345} [2024-06-14 11:52:02,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 11:52:02,110 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 345 transitions, 4335 flow [2024-06-14 11:52:02,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:52:02,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:02,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:02,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:52:02,110 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:02,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:02,111 INFO L85 PathProgramCache]: Analyzing trace with hash -660152366, now seen corresponding path program 4 times [2024-06-14 11:52:02,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:02,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140852678] [2024-06-14 11:52:02,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:02,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:03,195 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 11:52:03,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140852678] [2024-06-14 11:52:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140852678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:03,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336359784] [2024-06-14 11:52:03,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:03,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:03,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:03,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 345 transitions, 4335 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:52:03,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:03,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:03,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:04,780 INFO L124 PetriNetUnfolderBase]: 3170/5194 cut-off events. [2024-06-14 11:52:04,780 INFO L125 PetriNetUnfolderBase]: For 376522/376522 co-relation queries the response was YES. [2024-06-14 11:52:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40689 conditions, 5194 events. 3170/5194 cut-off events. For 376522/376522 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31902 event pairs, 669 based on Foata normal form. 12/5191 useless extension candidates. Maximal degree in co-relation 40577. Up to 4148 conditions per place. [2024-06-14 11:52:04,839 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 251 selfloop transitions, 149 changer transitions 0/405 dead transitions. [2024-06-14 11:52:04,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 405 transitions, 5468 flow [2024-06-14 11:52:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 11:52:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 11:52:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 248 transitions. [2024-06-14 11:52:04,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44364937388193204 [2024-06-14 11:52:04,841 INFO L175 Difference]: Start difference. First operand has 236 places, 345 transitions, 4335 flow. Second operand 13 states and 248 transitions. [2024-06-14 11:52:04,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 405 transitions, 5468 flow [2024-06-14 11:52:05,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 405 transitions, 5151 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 11:52:05,529 INFO L231 Difference]: Finished difference. Result has 241 places, 350 transitions, 4402 flow [2024-06-14 11:52:05,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4402, PETRI_PLACES=241, PETRI_TRANSITIONS=350} [2024-06-14 11:52:05,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 11:52:05,530 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 350 transitions, 4402 flow [2024-06-14 11:52:05,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:52:05,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:05,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:05,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:52:05,531 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:05,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash -364933166, now seen corresponding path program 5 times [2024-06-14 11:52:05,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:05,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774508031] [2024-06-14 11:52:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:05,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:06,491 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 11:52:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:06,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774508031] [2024-06-14 11:52:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774508031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:06,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:06,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:52:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108189220] [2024-06-14 11:52:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:52:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:06,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:52:06,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:52:06,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:06,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 350 transitions, 4402 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:52:06,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:06,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:06,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:07,934 INFO L124 PetriNetUnfolderBase]: 3150/5162 cut-off events. [2024-06-14 11:52:07,934 INFO L125 PetriNetUnfolderBase]: For 371315/371315 co-relation queries the response was YES. [2024-06-14 11:52:07,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40074 conditions, 5162 events. 3150/5162 cut-off events. For 371315/371315 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31676 event pairs, 520 based on Foata normal form. 12/5159 useless extension candidates. Maximal degree in co-relation 39960. Up to 3325 conditions per place. [2024-06-14 11:52:07,996 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 161 changer transitions 0/401 dead transitions. [2024-06-14 11:52:07,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 401 transitions, 5368 flow [2024-06-14 11:52:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 11:52:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 11:52:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-14 11:52:07,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 11:52:07,998 INFO L175 Difference]: Start difference. First operand has 241 places, 350 transitions, 4402 flow. Second operand 12 states and 231 transitions. [2024-06-14 11:52:07,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 401 transitions, 5368 flow [2024-06-14 11:52:08,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 401 transitions, 4924 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 11:52:08,725 INFO L231 Difference]: Finished difference. Result has 242 places, 349 transitions, 4214 flow [2024-06-14 11:52:08,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3888, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4214, PETRI_PLACES=242, PETRI_TRANSITIONS=349} [2024-06-14 11:52:08,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 11:52:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 349 transitions, 4214 flow [2024-06-14 11:52:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 11:52:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:08,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:08,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:52:08,728 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:08,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -261287067, now seen corresponding path program 5 times [2024-06-14 11:52:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180289914] [2024-06-14 11:52:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:09,472 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 11:52:09,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:09,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180289914] [2024-06-14 11:52:09,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180289914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:09,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:09,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:09,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051233159] [2024-06-14 11:52:09,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:09,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:09,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:09,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:09,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 349 transitions, 4214 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:09,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:09,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:09,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:10,501 INFO L124 PetriNetUnfolderBase]: 3152/5165 cut-off events. [2024-06-14 11:52:10,502 INFO L125 PetriNetUnfolderBase]: For 367504/367507 co-relation queries the response was YES. [2024-06-14 11:52:10,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39622 conditions, 5165 events. 3152/5165 cut-off events. For 367504/367507 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 31731 event pairs, 707 based on Foata normal form. 4/5149 useless extension candidates. Maximal degree in co-relation 39508. Up to 4543 conditions per place. [2024-06-14 11:52:10,557 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 264 selfloop transitions, 93 changer transitions 0/362 dead transitions. [2024-06-14 11:52:10,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 362 transitions, 5142 flow [2024-06-14 11:52:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 11:52:10,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 11:52:10,559 INFO L175 Difference]: Start difference. First operand has 242 places, 349 transitions, 4214 flow. Second operand 7 states and 130 transitions. [2024-06-14 11:52:10,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 362 transitions, 5142 flow [2024-06-14 11:52:11,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 362 transitions, 4730 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 11:52:11,293 INFO L231 Difference]: Finished difference. Result has 238 places, 352 transitions, 4058 flow [2024-06-14 11:52:11,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3802, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4058, PETRI_PLACES=238, PETRI_TRANSITIONS=352} [2024-06-14 11:52:11,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 11:52:11,310 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 352 transitions, 4058 flow [2024-06-14 11:52:11,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:11,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:11,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:11,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:52:11,310 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:11,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:11,311 INFO L85 PathProgramCache]: Analyzing trace with hash -792294879, now seen corresponding path program 6 times [2024-06-14 11:52:11,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:11,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086018599] [2024-06-14 11:52:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:11,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:11,977 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 11:52:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:11,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086018599] [2024-06-14 11:52:11,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086018599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:11,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:11,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:11,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361332406] [2024-06-14 11:52:11,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:11,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:12,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:12,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 352 transitions, 4058 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:12,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:12,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:13,007 INFO L124 PetriNetUnfolderBase]: 3147/5157 cut-off events. [2024-06-14 11:52:13,008 INFO L125 PetriNetUnfolderBase]: For 371903/371906 co-relation queries the response was YES. [2024-06-14 11:52:13,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38657 conditions, 5157 events. 3147/5157 cut-off events. For 371903/371906 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 31664 event pairs, 707 based on Foata normal form. 3/5140 useless extension candidates. Maximal degree in co-relation 38543. Up to 4538 conditions per place. [2024-06-14 11:52:13,063 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 102 changer transitions 0/361 dead transitions. [2024-06-14 11:52:13,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 361 transitions, 4796 flow [2024-06-14 11:52:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:52:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:52:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:52:13,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 11:52:13,065 INFO L175 Difference]: Start difference. First operand has 238 places, 352 transitions, 4058 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:52:13,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 361 transitions, 4796 flow [2024-06-14 11:52:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 361 transitions, 4552 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:13,942 INFO L231 Difference]: Finished difference. Result has 241 places, 352 transitions, 4024 flow [2024-06-14 11:52:13,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4024, PETRI_PLACES=241, PETRI_TRANSITIONS=352} [2024-06-14 11:52:13,943 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 11:52:13,943 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 352 transitions, 4024 flow [2024-06-14 11:52:13,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:13,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:13,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:13,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:52:13,943 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:13,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1871338921, now seen corresponding path program 4 times [2024-06-14 11:52:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:13,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393894127] [2024-06-14 11:52:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:13,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:14,935 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 11:52:14,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393894127] [2024-06-14 11:52:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393894127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:14,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:14,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:14,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020686355] [2024-06-14 11:52:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:14,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:14,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:15,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:15,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 352 transitions, 4024 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:52:15,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:15,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:15,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:16,127 INFO L124 PetriNetUnfolderBase]: 3183/5214 cut-off events. [2024-06-14 11:52:16,127 INFO L125 PetriNetUnfolderBase]: For 391084/391087 co-relation queries the response was YES. [2024-06-14 11:52:16,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 5214 events. 3183/5214 cut-off events. For 391084/391087 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32094 event pairs, 708 based on Foata normal form. 4/5198 useless extension candidates. Maximal degree in co-relation 39306. Up to 4553 conditions per place. [2024-06-14 11:52:16,191 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 267 selfloop transitions, 100 changer transitions 0/372 dead transitions. [2024-06-14 11:52:16,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 372 transitions, 5124 flow [2024-06-14 11:52:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 11:52:16,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 11:52:16,196 INFO L175 Difference]: Start difference. First operand has 241 places, 352 transitions, 4024 flow. Second operand 8 states and 146 transitions. [2024-06-14 11:52:16,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 372 transitions, 5124 flow [2024-06-14 11:52:17,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 372 transitions, 4880 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:17,210 INFO L231 Difference]: Finished difference. Result has 243 places, 360 transitions, 4176 flow [2024-06-14 11:52:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4176, PETRI_PLACES=243, PETRI_TRANSITIONS=360} [2024-06-14 11:52:17,210 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 11:52:17,210 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 360 transitions, 4176 flow [2024-06-14 11:52:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:52:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:17,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:52:17,211 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:17,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1871338487, now seen corresponding path program 2 times [2024-06-14 11:52:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441327314] [2024-06-14 11:52:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:18,190 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 11:52:18,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:18,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441327314] [2024-06-14 11:52:18,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441327314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:18,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:18,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090295191] [2024-06-14 11:52:18,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:18,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:18,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:18,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:18,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 360 transitions, 4176 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:18,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:18,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:18,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:19,326 INFO L124 PetriNetUnfolderBase]: 3104/5109 cut-off events. [2024-06-14 11:52:19,326 INFO L125 PetriNetUnfolderBase]: For 407026/407033 co-relation queries the response was YES. [2024-06-14 11:52:19,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39604 conditions, 5109 events. 3104/5109 cut-off events. For 407026/407033 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31831 event pairs, 684 based on Foata normal form. 7/5081 useless extension candidates. Maximal degree in co-relation 39487. Up to 4564 conditions per place. [2024-06-14 11:52:19,382 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 301 selfloop transitions, 28 changer transitions 0/375 dead transitions. [2024-06-14 11:52:19,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 375 transitions, 4962 flow [2024-06-14 11:52:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:52:19,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:52:19,384 INFO L175 Difference]: Start difference. First operand has 243 places, 360 transitions, 4176 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:52:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 375 transitions, 4962 flow [2024-06-14 11:52:20,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 375 transitions, 4743 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:20,202 INFO L231 Difference]: Finished difference. Result has 247 places, 363 transitions, 4105 flow [2024-06-14 11:52:20,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4105, PETRI_PLACES=247, PETRI_TRANSITIONS=363} [2024-06-14 11:52:20,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-14 11:52:20,203 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 363 transitions, 4105 flow [2024-06-14 11:52:20,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:20,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:20,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:20,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:52:20,204 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:20,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:20,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1857529351, now seen corresponding path program 5 times [2024-06-14 11:52:20,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:20,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113295648] [2024-06-14 11:52:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:20,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:21,183 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 11:52:21,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:21,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113295648] [2024-06-14 11:52:21,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113295648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:21,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:21,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:21,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720056366] [2024-06-14 11:52:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:21,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:21,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:21,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 363 transitions, 4105 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:52:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:22,206 INFO L124 PetriNetUnfolderBase]: 3197/5235 cut-off events. [2024-06-14 11:52:22,207 INFO L125 PetriNetUnfolderBase]: For 414131/414134 co-relation queries the response was YES. [2024-06-14 11:52:22,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40596 conditions, 5235 events. 3197/5235 cut-off events. For 414131/414134 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32232 event pairs, 705 based on Foata normal form. 4/5219 useless extension candidates. Maximal degree in co-relation 40477. Up to 4475 conditions per place. [2024-06-14 11:52:22,384 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 260 selfloop transitions, 126 changer transitions 0/391 dead transitions. [2024-06-14 11:52:22,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 391 transitions, 5457 flow [2024-06-14 11:52:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:52:22,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:52:22,386 INFO L175 Difference]: Start difference. First operand has 247 places, 363 transitions, 4105 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:52:22,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 391 transitions, 5457 flow [2024-06-14 11:52:23,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 391 transitions, 5335 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:23,045 INFO L231 Difference]: Finished difference. Result has 251 places, 378 transitions, 4560 flow [2024-06-14 11:52:23,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3983, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4560, PETRI_PLACES=251, PETRI_TRANSITIONS=378} [2024-06-14 11:52:23,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 11:52:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 378 transitions, 4560 flow [2024-06-14 11:52:23,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:52:23,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:23,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:23,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:52:23,047 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:23,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1857528917, now seen corresponding path program 3 times [2024-06-14 11:52:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:23,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61834051] [2024-06-14 11:52:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:24,109 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 11:52:24,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:24,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61834051] [2024-06-14 11:52:24,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61834051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:24,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:24,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:24,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109346413] [2024-06-14 11:52:24,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:24,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:24,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:24,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:24,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:24,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 378 transitions, 4560 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:24,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:24,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:24,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:25,147 INFO L124 PetriNetUnfolderBase]: 3119/5129 cut-off events. [2024-06-14 11:52:25,148 INFO L125 PetriNetUnfolderBase]: For 428146/428153 co-relation queries the response was YES. [2024-06-14 11:52:25,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41048 conditions, 5129 events. 3119/5129 cut-off events. For 428146/428153 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31878 event pairs, 681 based on Foata normal form. 6/5100 useless extension candidates. Maximal degree in co-relation 40926. Up to 4555 conditions per place. [2024-06-14 11:52:25,214 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 306 selfloop transitions, 44 changer transitions 0/401 dead transitions. [2024-06-14 11:52:25,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 401 transitions, 5655 flow [2024-06-14 11:52:25,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:52:25,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 11:52:25,215 INFO L175 Difference]: Start difference. First operand has 251 places, 378 transitions, 4560 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:52:25,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 401 transitions, 5655 flow [2024-06-14 11:52:26,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 401 transitions, 5412 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:26,005 INFO L231 Difference]: Finished difference. Result has 257 places, 389 transitions, 4659 flow [2024-06-14 11:52:26,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4659, PETRI_PLACES=257, PETRI_TRANSITIONS=389} [2024-06-14 11:52:26,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 11:52:26,006 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 389 transitions, 4659 flow [2024-06-14 11:52:26,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:26,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:26,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:26,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:52:26,007 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:26,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:26,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1871351011, now seen corresponding path program 6 times [2024-06-14 11:52:26,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:26,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208913615] [2024-06-14 11:52:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:26,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:26,860 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 11:52:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208913615] [2024-06-14 11:52:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208913615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:26,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:26,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:26,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436848369] [2024-06-14 11:52:26,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:26,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:26,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:26,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:52:26,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 389 transitions, 4659 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:52:26,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:26,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:52:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:27,934 INFO L124 PetriNetUnfolderBase]: 3204/5245 cut-off events. [2024-06-14 11:52:27,934 INFO L125 PetriNetUnfolderBase]: For 435928/435931 co-relation queries the response was YES. [2024-06-14 11:52:27,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41343 conditions, 5245 events. 3204/5245 cut-off events. For 435928/435931 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32290 event pairs, 705 based on Foata normal form. 4/5229 useless extension candidates. Maximal degree in co-relation 41218. Up to 4612 conditions per place. [2024-06-14 11:52:28,002 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 99 changer transitions 0/403 dead transitions. [2024-06-14 11:52:28,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 403 transitions, 5577 flow [2024-06-14 11:52:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:52:28,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:52:28,004 INFO L175 Difference]: Start difference. First operand has 257 places, 389 transitions, 4659 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:52:28,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 403 transitions, 5577 flow [2024-06-14 11:52:28,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 403 transitions, 5449 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 11:52:28,819 INFO L231 Difference]: Finished difference. Result has 262 places, 393 transitions, 4838 flow [2024-06-14 11:52:28,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4838, PETRI_PLACES=262, PETRI_TRANSITIONS=393} [2024-06-14 11:52:28,819 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 11:52:28,820 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 393 transitions, 4838 flow [2024-06-14 11:52:28,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:52:28,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:28,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:28,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:52:28,820 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:28,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1857053687, now seen corresponding path program 4 times [2024-06-14 11:52:28,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426406411] [2024-06-14 11:52:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:30,102 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 11:52:30,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:30,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426406411] [2024-06-14 11:52:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426406411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:30,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426678688] [2024-06-14 11:52:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:30,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:30,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 393 transitions, 4838 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:30,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:30,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:30,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:31,218 INFO L124 PetriNetUnfolderBase]: 3119/5115 cut-off events. [2024-06-14 11:52:31,218 INFO L125 PetriNetUnfolderBase]: For 452667/452693 co-relation queries the response was YES. [2024-06-14 11:52:31,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40838 conditions, 5115 events. 3119/5115 cut-off events. For 452667/452693 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31708 event pairs, 698 based on Foata normal form. 26/5094 useless extension candidates. Maximal degree in co-relation 40711. Up to 4604 conditions per place. [2024-06-14 11:52:31,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 334 selfloop transitions, 18 changer transitions 0/404 dead transitions. [2024-06-14 11:52:31,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 404 transitions, 5577 flow [2024-06-14 11:52:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 11:52:31,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 11:52:31,285 INFO L175 Difference]: Start difference. First operand has 262 places, 393 transitions, 4838 flow. Second operand 8 states and 141 transitions. [2024-06-14 11:52:31,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 404 transitions, 5577 flow [2024-06-14 11:52:32,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 404 transitions, 5248 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:32,195 INFO L231 Difference]: Finished difference. Result has 265 places, 394 transitions, 4564 flow [2024-06-14 11:52:32,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4564, PETRI_PLACES=265, PETRI_TRANSITIONS=394} [2024-06-14 11:52:32,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-14 11:52:32,196 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 394 transitions, 4564 flow [2024-06-14 11:52:32,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:32,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:32,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:32,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:52:32,197 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:32,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:32,197 INFO L85 PathProgramCache]: Analyzing trace with hash 313406113, now seen corresponding path program 1 times [2024-06-14 11:52:32,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:32,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727571256] [2024-06-14 11:52:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:32,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:33,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:33,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727571256] [2024-06-14 11:52:33,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727571256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:33,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:33,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:33,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25698578] [2024-06-14 11:52:33,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:33,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:33,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:33,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:33,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:33,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:33,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 394 transitions, 4564 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:33,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:33,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:33,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:34,209 INFO L124 PetriNetUnfolderBase]: 3114/5150 cut-off events. [2024-06-14 11:52:34,210 INFO L125 PetriNetUnfolderBase]: For 453462/453462 co-relation queries the response was YES. [2024-06-14 11:52:34,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40856 conditions, 5150 events. 3114/5150 cut-off events. For 453462/453462 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32052 event pairs, 701 based on Foata normal form. 1/5149 useless extension candidates. Maximal degree in co-relation 40727. Up to 4671 conditions per place. [2024-06-14 11:52:34,275 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 18 changer transitions 0/416 dead transitions. [2024-06-14 11:52:34,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 416 transitions, 5480 flow [2024-06-14 11:52:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:52:34,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 11:52:34,276 INFO L175 Difference]: Start difference. First operand has 265 places, 394 transitions, 4564 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:52:34,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 416 transitions, 5480 flow [2024-06-14 11:52:35,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 416 transitions, 5408 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:35,215 INFO L231 Difference]: Finished difference. Result has 266 places, 397 transitions, 4600 flow [2024-06-14 11:52:35,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4600, PETRI_PLACES=266, PETRI_TRANSITIONS=397} [2024-06-14 11:52:35,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-14 11:52:35,216 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 397 transitions, 4600 flow [2024-06-14 11:52:35,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:35,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:35,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:35,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:52:35,216 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:35,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1328771511, now seen corresponding path program 1 times [2024-06-14 11:52:35,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:35,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062030812] [2024-06-14 11:52:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:35,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:36,213 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 11:52:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:36,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062030812] [2024-06-14 11:52:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062030812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:36,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:36,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158701663] [2024-06-14 11:52:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:36,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:36,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:36,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:36,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 397 transitions, 4600 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:36,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:36,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:36,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:37,406 INFO L124 PetriNetUnfolderBase]: 3125/5169 cut-off events. [2024-06-14 11:52:37,406 INFO L125 PetriNetUnfolderBase]: For 473699/473699 co-relation queries the response was YES. [2024-06-14 11:52:37,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41491 conditions, 5169 events. 3125/5169 cut-off events. For 473699/473699 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 32190 event pairs, 700 based on Foata normal form. 4/5171 useless extension candidates. Maximal degree in co-relation 41362. Up to 4686 conditions per place. [2024-06-14 11:52:37,470 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 379 selfloop transitions, 19 changer transitions 0/418 dead transitions. [2024-06-14 11:52:37,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 418 transitions, 5520 flow [2024-06-14 11:52:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:52:37,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:52:37,471 INFO L175 Difference]: Start difference. First operand has 266 places, 397 transitions, 4600 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:52:37,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 418 transitions, 5520 flow [2024-06-14 11:52:38,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 418 transitions, 5434 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:38,470 INFO L231 Difference]: Finished difference. Result has 268 places, 401 transitions, 4629 flow [2024-06-14 11:52:38,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4629, PETRI_PLACES=268, PETRI_TRANSITIONS=401} [2024-06-14 11:52:38,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 11:52:38,471 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 401 transitions, 4629 flow [2024-06-14 11:52:38,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:38,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:52:38,472 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:38,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash 318052579, now seen corresponding path program 2 times [2024-06-14 11:52:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:38,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801316156] [2024-06-14 11:52:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:39,449 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 11:52:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801316156] [2024-06-14 11:52:39,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801316156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:39,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:39,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:39,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243723596] [2024-06-14 11:52:39,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:39,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:39,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:39,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:39,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 401 transitions, 4629 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:39,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:39,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:39,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:40,637 INFO L124 PetriNetUnfolderBase]: 3140/5202 cut-off events. [2024-06-14 11:52:40,637 INFO L125 PetriNetUnfolderBase]: For 487598/487598 co-relation queries the response was YES. [2024-06-14 11:52:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42363 conditions, 5202 events. 3140/5202 cut-off events. For 487598/487598 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32517 event pairs, 699 based on Foata normal form. 4/5204 useless extension candidates. Maximal degree in co-relation 42233. Up to 4696 conditions per place. [2024-06-14 11:52:40,701 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 376 selfloop transitions, 24 changer transitions 0/420 dead transitions. [2024-06-14 11:52:40,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 420 transitions, 5563 flow [2024-06-14 11:52:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:52:40,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:52:40,703 INFO L175 Difference]: Start difference. First operand has 268 places, 401 transitions, 4629 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:52:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 420 transitions, 5563 flow [2024-06-14 11:52:41,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 420 transitions, 5476 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:41,812 INFO L231 Difference]: Finished difference. Result has 270 places, 405 transitions, 4675 flow [2024-06-14 11:52:41,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4675, PETRI_PLACES=270, PETRI_TRANSITIONS=405} [2024-06-14 11:52:41,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-14 11:52:41,821 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 405 transitions, 4675 flow [2024-06-14 11:52:41,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:41,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:41,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:41,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:52:41,822 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:41,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:41,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1324123371, now seen corresponding path program 3 times [2024-06-14 11:52:41,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:41,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415286877] [2024-06-14 11:52:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:42,746 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 11:52:42,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415286877] [2024-06-14 11:52:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415286877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:42,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:42,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:42,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946872569] [2024-06-14 11:52:42,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:42,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:42,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:42,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 405 transitions, 4675 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:42,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:42,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:42,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:43,941 INFO L124 PetriNetUnfolderBase]: 3181/5259 cut-off events. [2024-06-14 11:52:43,941 INFO L125 PetriNetUnfolderBase]: For 506725/506725 co-relation queries the response was YES. [2024-06-14 11:52:43,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43731 conditions, 5259 events. 3181/5259 cut-off events. For 506725/506725 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 32867 event pairs, 698 based on Foata normal form. 3/5260 useless extension candidates. Maximal degree in co-relation 43600. Up to 4714 conditions per place. [2024-06-14 11:52:44,013 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 39 changer transitions 0/431 dead transitions. [2024-06-14 11:52:44,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 431 transitions, 5889 flow [2024-06-14 11:52:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:52:44,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:52:44,015 INFO L175 Difference]: Start difference. First operand has 270 places, 405 transitions, 4675 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:52:44,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 431 transitions, 5889 flow [2024-06-14 11:52:45,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 431 transitions, 5784 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:45,109 INFO L231 Difference]: Finished difference. Result has 273 places, 415 transitions, 4866 flow [2024-06-14 11:52:45,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4570, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4866, PETRI_PLACES=273, PETRI_TRANSITIONS=415} [2024-06-14 11:52:45,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 11:52:45,110 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 415 transitions, 4866 flow [2024-06-14 11:52:45,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:45,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:45,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:45,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:52:45,111 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:45,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1865618863, now seen corresponding path program 4 times [2024-06-14 11:52:45,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:45,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649904486] [2024-06-14 11:52:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:45,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:45,971 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 11:52:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649904486] [2024-06-14 11:52:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649904486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:45,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:45,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:45,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779577375] [2024-06-14 11:52:45,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:45,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:45,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:46,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:46,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 415 transitions, 4866 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:46,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:46,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:46,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:47,150 INFO L124 PetriNetUnfolderBase]: 3236/5341 cut-off events. [2024-06-14 11:52:47,151 INFO L125 PetriNetUnfolderBase]: For 542636/542639 co-relation queries the response was YES. [2024-06-14 11:52:47,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45883 conditions, 5341 events. 3236/5341 cut-off events. For 542636/542639 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33382 event pairs, 711 based on Foata normal form. 5/5342 useless extension candidates. Maximal degree in co-relation 45750. Up to 4778 conditions per place. [2024-06-14 11:52:47,223 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 377 selfloop transitions, 40 changer transitions 0/437 dead transitions. [2024-06-14 11:52:47,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 437 transitions, 6088 flow [2024-06-14 11:52:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:52:47,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:52:47,224 INFO L175 Difference]: Start difference. First operand has 273 places, 415 transitions, 4866 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:52:47,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 437 transitions, 6088 flow [2024-06-14 11:52:48,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 437 transitions, 6017 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:48,319 INFO L231 Difference]: Finished difference. Result has 278 places, 422 transitions, 5050 flow [2024-06-14 11:52:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4795, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5050, PETRI_PLACES=278, PETRI_TRANSITIONS=422} [2024-06-14 11:52:48,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 11:52:48,320 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 422 transitions, 5050 flow [2024-06-14 11:52:48,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:48,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:48,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:52:48,321 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:48,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1865625373, now seen corresponding path program 5 times [2024-06-14 11:52:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:48,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753843503] [2024-06-14 11:52:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:49,256 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 11:52:49,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:49,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753843503] [2024-06-14 11:52:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753843503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:49,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:49,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350830215] [2024-06-14 11:52:49,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:49,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:49,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:49,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:49,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 422 transitions, 5050 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:49,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:49,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:49,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:50,383 INFO L124 PetriNetUnfolderBase]: 3224/5325 cut-off events. [2024-06-14 11:52:50,383 INFO L125 PetriNetUnfolderBase]: For 552366/552369 co-relation queries the response was YES. [2024-06-14 11:52:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46372 conditions, 5325 events. 3224/5325 cut-off events. For 552366/552369 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 33284 event pairs, 707 based on Foata normal form. 6/5327 useless extension candidates. Maximal degree in co-relation 46236. Up to 4797 conditions per place. [2024-06-14 11:52:50,452 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 387 selfloop transitions, 31 changer transitions 0/438 dead transitions. [2024-06-14 11:52:50,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 438 transitions, 6053 flow [2024-06-14 11:52:50,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:52:50,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:52:50,453 INFO L175 Difference]: Start difference. First operand has 278 places, 422 transitions, 5050 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:52:50,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 438 transitions, 6053 flow [2024-06-14 11:52:51,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 438 transitions, 5936 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:51,645 INFO L231 Difference]: Finished difference. Result has 282 places, 426 transitions, 5105 flow [2024-06-14 11:52:51,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4949, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5105, PETRI_PLACES=282, PETRI_TRANSITIONS=426} [2024-06-14 11:52:51,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 11:52:51,649 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 426 transitions, 5105 flow [2024-06-14 11:52:51,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:51,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:51,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:51,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:52:51,650 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:51,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1857344653, now seen corresponding path program 6 times [2024-06-14 11:52:51,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454943985] [2024-06-14 11:52:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:51,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:52,721 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 11:52:52,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454943985] [2024-06-14 11:52:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454943985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:52,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:52,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569378894] [2024-06-14 11:52:52,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:52,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:52,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:52,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 426 transitions, 5105 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:52,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:52,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:54,010 INFO L124 PetriNetUnfolderBase]: 3215/5313 cut-off events. [2024-06-14 11:52:54,010 INFO L125 PetriNetUnfolderBase]: For 550478/550481 co-relation queries the response was YES. [2024-06-14 11:52:54,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46181 conditions, 5313 events. 3215/5313 cut-off events. For 550478/550481 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33257 event pairs, 705 based on Foata normal form. 5/5314 useless extension candidates. Maximal degree in co-relation 46043. Up to 4688 conditions per place. [2024-06-14 11:52:54,079 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 353 selfloop transitions, 71 changer transitions 0/444 dead transitions. [2024-06-14 11:52:54,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 444 transitions, 6277 flow [2024-06-14 11:52:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:52:54,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:52:54,081 INFO L175 Difference]: Start difference. First operand has 282 places, 426 transitions, 5105 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:52:54,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 444 transitions, 6277 flow [2024-06-14 11:52:55,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 444 transitions, 6158 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:55,407 INFO L231 Difference]: Finished difference. Result has 284 places, 429 transitions, 5211 flow [2024-06-14 11:52:55,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5211, PETRI_PLACES=284, PETRI_TRANSITIONS=429} [2024-06-14 11:52:55,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 11:52:55,408 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 429 transitions, 5211 flow [2024-06-14 11:52:55,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:55,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:55,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:55,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:52:55,409 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:55,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1857036823, now seen corresponding path program 1 times [2024-06-14 11:52:55,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:55,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753437423] [2024-06-14 11:52:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:55,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:56,627 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 11:52:56,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:56,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753437423] [2024-06-14 11:52:56,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753437423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:56,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:56,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:52:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509180286] [2024-06-14 11:52:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:52:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:52:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:52:56,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:52:56,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 429 transitions, 5211 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:52:56,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:56,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:52:56,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:57,895 INFO L124 PetriNetUnfolderBase]: 3225/5268 cut-off events. [2024-06-14 11:52:57,896 INFO L125 PetriNetUnfolderBase]: For 569559/569585 co-relation queries the response was YES. [2024-06-14 11:52:57,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46298 conditions, 5268 events. 3225/5268 cut-off events. For 569559/569585 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32610 event pairs, 694 based on Foata normal form. 27/5248 useless extension candidates. Maximal degree in co-relation 46159. Up to 4752 conditions per place. [2024-06-14 11:52:57,958 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 370 selfloop transitions, 20 changer transitions 0/443 dead transitions. [2024-06-14 11:52:57,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 443 transitions, 6111 flow [2024-06-14 11:52:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 11:52:57,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 11:52:57,959 INFO L175 Difference]: Start difference. First operand has 284 places, 429 transitions, 5211 flow. Second operand 9 states and 156 transitions. [2024-06-14 11:52:57,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 443 transitions, 6111 flow [2024-06-14 11:52:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 443 transitions, 5920 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:59,749 INFO L231 Difference]: Finished difference. Result has 287 places, 431 transitions, 5157 flow [2024-06-14 11:52:59,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5157, PETRI_PLACES=287, PETRI_TRANSITIONS=431} [2024-06-14 11:52:59,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 11:52:59,750 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 431 transitions, 5157 flow [2024-06-14 11:52:59,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:52:59,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:59,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:59,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:52:59,750 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:52:59,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:59,751 INFO L85 PathProgramCache]: Analyzing trace with hash -365782597, now seen corresponding path program 1 times [2024-06-14 11:52:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334519686] [2024-06-14 11:52:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:00,415 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 11:53:00,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:00,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334519686] [2024-06-14 11:53:00,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334519686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:00,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762701385] [2024-06-14 11:53:00,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:00,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:00,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:00,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:00,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 431 transitions, 5157 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:00,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:00,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:00,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:01,685 INFO L124 PetriNetUnfolderBase]: 3338/5429 cut-off events. [2024-06-14 11:53:01,685 INFO L125 PetriNetUnfolderBase]: For 575032/575035 co-relation queries the response was YES. [2024-06-14 11:53:01,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47484 conditions, 5429 events. 3338/5429 cut-off events. For 575032/575035 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33299 event pairs, 659 based on Foata normal form. 6/5431 useless extension candidates. Maximal degree in co-relation 47344. Up to 4749 conditions per place. [2024-06-14 11:53:01,762 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 369 selfloop transitions, 91 changer transitions 0/465 dead transitions. [2024-06-14 11:53:01,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 465 transitions, 6361 flow [2024-06-14 11:53:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:53:01,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:53:01,770 INFO L175 Difference]: Start difference. First operand has 287 places, 431 transitions, 5157 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:53:01,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 465 transitions, 6361 flow [2024-06-14 11:53:03,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 465 transitions, 6232 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 11:53:03,290 INFO L231 Difference]: Finished difference. Result has 289 places, 440 transitions, 5457 flow [2024-06-14 11:53:03,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5028, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5457, PETRI_PLACES=289, PETRI_TRANSITIONS=440} [2024-06-14 11:53:03,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 11:53:03,291 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 440 transitions, 5457 flow [2024-06-14 11:53:03,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:03,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:03,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:03,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:53:03,291 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:03,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1834006074, now seen corresponding path program 1 times [2024-06-14 11:53:03,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:03,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329193118] [2024-06-14 11:53:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:03,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:04,155 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 11:53:04,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:04,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329193118] [2024-06-14 11:53:04,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329193118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:04,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:04,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:04,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331455783] [2024-06-14 11:53:04,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:04,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:04,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:04,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:04,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 440 transitions, 5457 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:04,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:04,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:04,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:05,381 INFO L124 PetriNetUnfolderBase]: 3348/5450 cut-off events. [2024-06-14 11:53:05,381 INFO L125 PetriNetUnfolderBase]: For 587139/587142 co-relation queries the response was YES. [2024-06-14 11:53:05,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49019 conditions, 5450 events. 3348/5450 cut-off events. For 587139/587142 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33456 event pairs, 670 based on Foata normal form. 4/5451 useless extension candidates. Maximal degree in co-relation 48877. Up to 4921 conditions per place. [2024-06-14 11:53:05,458 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 393 selfloop transitions, 65 changer transitions 0/463 dead transitions. [2024-06-14 11:53:05,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 463 transitions, 6519 flow [2024-06-14 11:53:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:53:05,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:53:05,459 INFO L175 Difference]: Start difference. First operand has 289 places, 440 transitions, 5457 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:53:05,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 463 transitions, 6519 flow [2024-06-14 11:53:06,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 463 transitions, 6306 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 11:53:06,822 INFO L231 Difference]: Finished difference. Result has 292 places, 444 transitions, 5465 flow [2024-06-14 11:53:06,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5465, PETRI_PLACES=292, PETRI_TRANSITIONS=444} [2024-06-14 11:53:06,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-14 11:53:06,822 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 444 transitions, 5465 flow [2024-06-14 11:53:06,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:06,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:06,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:06,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:53:06,823 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:06,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash -997728309, now seen corresponding path program 2 times [2024-06-14 11:53:06,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:06,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269489501] [2024-06-14 11:53:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:06,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:07,580 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 11:53:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:07,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269489501] [2024-06-14 11:53:07,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269489501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:07,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:07,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:07,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879414381] [2024-06-14 11:53:07,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:07,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:07,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:07,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:07,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 444 transitions, 5465 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:07,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:07,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:07,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:08,916 INFO L124 PetriNetUnfolderBase]: 3368/5485 cut-off events. [2024-06-14 11:53:08,917 INFO L125 PetriNetUnfolderBase]: For 605101/605104 co-relation queries the response was YES. [2024-06-14 11:53:08,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48858 conditions, 5485 events. 3368/5485 cut-off events. For 605101/605104 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 33784 event pairs, 664 based on Foata normal form. 6/5487 useless extension candidates. Maximal degree in co-relation 48715. Up to 4761 conditions per place. [2024-06-14 11:53:08,996 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 371 selfloop transitions, 95 changer transitions 0/471 dead transitions. [2024-06-14 11:53:08,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 471 transitions, 6637 flow [2024-06-14 11:53:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:53:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:53:08,998 INFO L175 Difference]: Start difference. First operand has 292 places, 444 transitions, 5465 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:53:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 471 transitions, 6637 flow [2024-06-14 11:53:10,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 471 transitions, 6466 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:10,309 INFO L231 Difference]: Finished difference. Result has 294 places, 448 transitions, 5605 flow [2024-06-14 11:53:10,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5605, PETRI_PLACES=294, PETRI_TRANSITIONS=448} [2024-06-14 11:53:10,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 11:53:10,310 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 448 transitions, 5605 flow [2024-06-14 11:53:10,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:10,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:10,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:10,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:53:10,311 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:10,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:10,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1586696173, now seen corresponding path program 3 times [2024-06-14 11:53:10,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:10,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716124783] [2024-06-14 11:53:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:10,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:11,094 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 11:53:11,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:11,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716124783] [2024-06-14 11:53:11,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716124783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:11,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:11,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:11,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254615213] [2024-06-14 11:53:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:11,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:11,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:11,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:11,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 448 transitions, 5605 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:11,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:11,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:11,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:12,467 INFO L124 PetriNetUnfolderBase]: 3420/5574 cut-off events. [2024-06-14 11:53:12,467 INFO L125 PetriNetUnfolderBase]: For 639535/639538 co-relation queries the response was YES. [2024-06-14 11:53:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50966 conditions, 5574 events. 3420/5574 cut-off events. For 639535/639538 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34498 event pairs, 693 based on Foata normal form. 6/5576 useless extension candidates. Maximal degree in co-relation 50822. Up to 4678 conditions per place. [2024-06-14 11:53:12,539 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 358 selfloop transitions, 112 changer transitions 0/475 dead transitions. [2024-06-14 11:53:12,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 475 transitions, 7039 flow [2024-06-14 11:53:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:53:12,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:53:12,541 INFO L175 Difference]: Start difference. First operand has 294 places, 448 transitions, 5605 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:53:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 475 transitions, 7039 flow [2024-06-14 11:53:13,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 475 transitions, 6764 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:13,675 INFO L231 Difference]: Finished difference. Result has 296 places, 455 transitions, 5755 flow [2024-06-14 11:53:13,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5755, PETRI_PLACES=296, PETRI_TRANSITIONS=455} [2024-06-14 11:53:13,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 11:53:13,676 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 455 transitions, 5755 flow [2024-06-14 11:53:13,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:13,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:13,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:53:13,676 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:13,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1627352634, now seen corresponding path program 2 times [2024-06-14 11:53:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268424883] [2024-06-14 11:53:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:14,484 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 11:53:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268424883] [2024-06-14 11:53:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268424883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:14,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:14,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:14,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172503580] [2024-06-14 11:53:14,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:14,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:14,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 455 transitions, 5755 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:14,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:14,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:14,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:15,755 INFO L124 PetriNetUnfolderBase]: 3430/5587 cut-off events. [2024-06-14 11:53:15,755 INFO L125 PetriNetUnfolderBase]: For 651824/651827 co-relation queries the response was YES. [2024-06-14 11:53:15,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51722 conditions, 5587 events. 3430/5587 cut-off events. For 651824/651827 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34552 event pairs, 675 based on Foata normal form. 4/5588 useless extension candidates. Maximal degree in co-relation 51577. Up to 4962 conditions per place. [2024-06-14 11:53:15,832 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 87 changer transitions 0/474 dead transitions. [2024-06-14 11:53:15,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 474 transitions, 6823 flow [2024-06-14 11:53:15,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:53:15,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 11:53:15,834 INFO L175 Difference]: Start difference. First operand has 296 places, 455 transitions, 5755 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:53:15,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 474 transitions, 6823 flow [2024-06-14 11:53:17,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 474 transitions, 6633 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:17,415 INFO L231 Difference]: Finished difference. Result has 300 places, 459 transitions, 5838 flow [2024-06-14 11:53:17,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5838, PETRI_PLACES=300, PETRI_TRANSITIONS=459} [2024-06-14 11:53:17,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 11:53:17,415 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 459 transitions, 5838 flow [2024-06-14 11:53:17,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:17,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:17,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:17,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:53:17,416 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:17,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1967013476, now seen corresponding path program 3 times [2024-06-14 11:53:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:17,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697165424] [2024-06-14 11:53:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:17,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697165424] [2024-06-14 11:53:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697165424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:18,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:18,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:18,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773013267] [2024-06-14 11:53:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:18,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:18,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:18,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:18,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:18,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 459 transitions, 5838 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:18,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:18,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:18,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:19,753 INFO L124 PetriNetUnfolderBase]: 3432/5590 cut-off events. [2024-06-14 11:53:19,753 INFO L125 PetriNetUnfolderBase]: For 660466/660469 co-relation queries the response was YES. [2024-06-14 11:53:19,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51901 conditions, 5590 events. 3432/5590 cut-off events. For 660466/660469 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34512 event pairs, 675 based on Foata normal form. 4/5591 useless extension candidates. Maximal degree in co-relation 51754. Up to 4899 conditions per place. [2024-06-14 11:53:19,835 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 373 selfloop transitions, 100 changer transitions 0/478 dead transitions. [2024-06-14 11:53:19,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 478 transitions, 7074 flow [2024-06-14 11:53:19,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:53:19,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:53:19,838 INFO L175 Difference]: Start difference. First operand has 300 places, 459 transitions, 5838 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:53:19,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 478 transitions, 7074 flow [2024-06-14 11:53:21,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 478 transitions, 6851 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:21,393 INFO L231 Difference]: Finished difference. Result has 302 places, 462 transitions, 5901 flow [2024-06-14 11:53:21,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5615, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5901, PETRI_PLACES=302, PETRI_TRANSITIONS=462} [2024-06-14 11:53:21,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 11:53:21,394 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 462 transitions, 5901 flow [2024-06-14 11:53:21,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:21,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:21,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:53:21,397 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:21,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1641613327, now seen corresponding path program 1 times [2024-06-14 11:53:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:21,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734302728] [2024-06-14 11:53:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:21,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:22,164 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 11:53:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:22,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734302728] [2024-06-14 11:53:22,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734302728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:22,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:22,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:22,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917943996] [2024-06-14 11:53:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:22,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:22,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:22,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:22,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:22,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:22,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 462 transitions, 5901 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:22,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:22,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:22,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:23,547 INFO L124 PetriNetUnfolderBase]: 3448/5619 cut-off events. [2024-06-14 11:53:23,547 INFO L125 PetriNetUnfolderBase]: For 683525/683530 co-relation queries the response was YES. [2024-06-14 11:53:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52372 conditions, 5619 events. 3448/5619 cut-off events. For 683525/683530 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34810 event pairs, 522 based on Foata normal form. 8/5624 useless extension candidates. Maximal degree in co-relation 52224. Up to 4987 conditions per place. [2024-06-14 11:53:23,631 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 418 selfloop transitions, 67 changer transitions 0/490 dead transitions. [2024-06-14 11:53:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 490 transitions, 7057 flow [2024-06-14 11:53:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:53:23,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:53:23,632 INFO L175 Difference]: Start difference. First operand has 302 places, 462 transitions, 5901 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:53:23,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 490 transitions, 7057 flow [2024-06-14 11:53:25,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 490 transitions, 6837 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:53:25,399 INFO L231 Difference]: Finished difference. Result has 305 places, 465 transitions, 5933 flow [2024-06-14 11:53:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5933, PETRI_PLACES=305, PETRI_TRANSITIONS=465} [2024-06-14 11:53:25,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 11:53:25,399 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 465 transitions, 5933 flow [2024-06-14 11:53:25,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:25,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:53:25,400 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:25,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1638200743, now seen corresponding path program 2 times [2024-06-14 11:53:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516330779] [2024-06-14 11:53:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:26,184 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 11:53:26,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:26,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516330779] [2024-06-14 11:53:26,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516330779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:26,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:26,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134710369] [2024-06-14 11:53:26,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:26,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:26,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 465 transitions, 5933 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:26,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:26,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:26,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:27,601 INFO L124 PetriNetUnfolderBase]: 3464/5643 cut-off events. [2024-06-14 11:53:27,601 INFO L125 PetriNetUnfolderBase]: For 700260/700265 co-relation queries the response was YES. [2024-06-14 11:53:27,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52963 conditions, 5643 events. 3464/5643 cut-off events. For 700260/700265 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34959 event pairs, 658 based on Foata normal form. 8/5648 useless extension candidates. Maximal degree in co-relation 52814. Up to 5047 conditions per place. [2024-06-14 11:53:27,683 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 87 changer transitions 0/489 dead transitions. [2024-06-14 11:53:27,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 489 transitions, 7079 flow [2024-06-14 11:53:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:53:27,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:53:27,685 INFO L175 Difference]: Start difference. First operand has 305 places, 465 transitions, 5933 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:53:27,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 489 transitions, 7079 flow [2024-06-14 11:53:29,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 489 transitions, 6849 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:29,061 INFO L231 Difference]: Finished difference. Result has 307 places, 468 transitions, 6006 flow [2024-06-14 11:53:29,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5703, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6006, PETRI_PLACES=307, PETRI_TRANSITIONS=468} [2024-06-14 11:53:29,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 11:53:29,062 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 468 transitions, 6006 flow [2024-06-14 11:53:29,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:29,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:29,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:53:29,063 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:29,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:29,063 INFO L85 PathProgramCache]: Analyzing trace with hash 332316471, now seen corresponding path program 3 times [2024-06-14 11:53:29,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:29,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194132187] [2024-06-14 11:53:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:29,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:29,848 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 11:53:29,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:29,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194132187] [2024-06-14 11:53:29,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194132187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:29,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:29,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:29,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234147359] [2024-06-14 11:53:29,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:29,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:29,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:29,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:29,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 468 transitions, 6006 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:29,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:29,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:29,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:31,243 INFO L124 PetriNetUnfolderBase]: 3480/5662 cut-off events. [2024-06-14 11:53:31,243 INFO L125 PetriNetUnfolderBase]: For 719292/719295 co-relation queries the response was YES. [2024-06-14 11:53:31,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53461 conditions, 5662 events. 3480/5662 cut-off events. For 719292/719295 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35067 event pairs, 675 based on Foata normal form. 6/5665 useless extension candidates. Maximal degree in co-relation 53311. Up to 5031 conditions per place. [2024-06-14 11:53:31,319 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 82 changer transitions 0/487 dead transitions. [2024-06-14 11:53:31,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 487 transitions, 7136 flow [2024-06-14 11:53:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:53:31,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 11:53:31,320 INFO L175 Difference]: Start difference. First operand has 307 places, 468 transitions, 6006 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:53:31,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 487 transitions, 7136 flow [2024-06-14 11:53:32,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 487 transitions, 6865 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:32,957 INFO L231 Difference]: Finished difference. Result has 309 places, 471 transitions, 6029 flow [2024-06-14 11:53:32,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6029, PETRI_PLACES=309, PETRI_TRANSITIONS=471} [2024-06-14 11:53:32,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-14 11:53:32,958 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 471 transitions, 6029 flow [2024-06-14 11:53:32,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:32,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:32,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:53:32,959 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:32,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:32,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1942950769, now seen corresponding path program 1 times [2024-06-14 11:53:32,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:32,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396490494] [2024-06-14 11:53:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396490494] [2024-06-14 11:53:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396490494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:33,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:33,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:53:33,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499761290] [2024-06-14 11:53:33,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:33,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:53:33,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:33,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:53:33,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:53:33,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:33,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 471 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:33,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:33,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:33,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:35,285 INFO L124 PetriNetUnfolderBase]: 3500/5695 cut-off events. [2024-06-14 11:53:35,285 INFO L125 PetriNetUnfolderBase]: For 733635/733640 co-relation queries the response was YES. [2024-06-14 11:53:35,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53910 conditions, 5695 events. 3500/5695 cut-off events. For 733635/733640 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 35319 event pairs, 657 based on Foata normal form. 8/5700 useless extension candidates. Maximal degree in co-relation 53759. Up to 5093 conditions per place. [2024-06-14 11:53:35,496 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 400 selfloop transitions, 92 changer transitions 0/497 dead transitions. [2024-06-14 11:53:35,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 497 transitions, 7217 flow [2024-06-14 11:53:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:53:35,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:53:35,498 INFO L175 Difference]: Start difference. First operand has 309 places, 471 transitions, 6029 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:53:35,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 497 transitions, 7217 flow [2024-06-14 11:53:37,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 497 transitions, 6945 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:37,070 INFO L231 Difference]: Finished difference. Result has 312 places, 475 transitions, 6078 flow [2024-06-14 11:53:37,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5757, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6078, PETRI_PLACES=312, PETRI_TRANSITIONS=475} [2024-06-14 11:53:37,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 11:53:37,071 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 475 transitions, 6078 flow [2024-06-14 11:53:37,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:37,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:37,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:37,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:53:37,071 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:37,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1967009911, now seen corresponding path program 2 times [2024-06-14 11:53:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:37,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930029079] [2024-06-14 11:53:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:37,961 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 11:53:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930029079] [2024-06-14 11:53:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930029079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:37,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:37,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:53:37,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407686213] [2024-06-14 11:53:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:53:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:53:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:53:38,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:38,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 475 transitions, 6078 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:38,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:38,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:38,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:39,371 INFO L124 PetriNetUnfolderBase]: 3612/5856 cut-off events. [2024-06-14 11:53:39,371 INFO L125 PetriNetUnfolderBase]: For 798754/798757 co-relation queries the response was YES. [2024-06-14 11:53:39,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57311 conditions, 5856 events. 3612/5856 cut-off events. For 798754/798757 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 36399 event pairs, 672 based on Foata normal form. 6/5859 useless extension candidates. Maximal degree in co-relation 57159. Up to 5031 conditions per place. [2024-06-14 11:53:39,459 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 394 selfloop transitions, 110 changer transitions 0/509 dead transitions. [2024-06-14 11:53:39,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 509 transitions, 7976 flow [2024-06-14 11:53:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 11:53:39,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 11:53:39,461 INFO L175 Difference]: Start difference. First operand has 312 places, 475 transitions, 6078 flow. Second operand 9 states and 170 transitions. [2024-06-14 11:53:39,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 509 transitions, 7976 flow [2024-06-14 11:53:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 509 transitions, 7689 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 11:53:41,199 INFO L231 Difference]: Finished difference. Result has 316 places, 487 transitions, 6457 flow [2024-06-14 11:53:41,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6457, PETRI_PLACES=316, PETRI_TRANSITIONS=487} [2024-06-14 11:53:41,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 11:53:41,199 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 487 transitions, 6457 flow [2024-06-14 11:53:41,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:41,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:41,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:41,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:53:41,200 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:41,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1627464079, now seen corresponding path program 3 times [2024-06-14 11:53:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:41,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473645371] [2024-06-14 11:53:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:41,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:42,189 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 11:53:42,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:42,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473645371] [2024-06-14 11:53:42,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473645371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:42,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:42,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:53:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709483162] [2024-06-14 11:53:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:42,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:53:42,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:53:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:53:42,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:42,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 487 transitions, 6457 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:42,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:42,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:42,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:43,629 INFO L124 PetriNetUnfolderBase]: 3614/5856 cut-off events. [2024-06-14 11:53:43,629 INFO L125 PetriNetUnfolderBase]: For 807973/807976 co-relation queries the response was YES. [2024-06-14 11:53:43,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58048 conditions, 5856 events. 3614/5856 cut-off events. For 807973/807976 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 36319 event pairs, 683 based on Foata normal form. 4/5857 useless extension candidates. Maximal degree in co-relation 57893. Up to 5217 conditions per place. [2024-06-14 11:53:43,721 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 415 selfloop transitions, 87 changer transitions 0/507 dead transitions. [2024-06-14 11:53:43,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 507 transitions, 7649 flow [2024-06-14 11:53:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 11:53:43,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:53:43,722 INFO L175 Difference]: Start difference. First operand has 316 places, 487 transitions, 6457 flow. Second operand 9 states and 162 transitions. [2024-06-14 11:53:43,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 507 transitions, 7649 flow [2024-06-14 11:53:46,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 507 transitions, 7366 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:46,162 INFO L231 Difference]: Finished difference. Result has 321 places, 491 transitions, 6503 flow [2024-06-14 11:53:46,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6190, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6503, PETRI_PLACES=321, PETRI_TRANSITIONS=491} [2024-06-14 11:53:46,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 11:53:46,163 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 491 transitions, 6503 flow [2024-06-14 11:53:46,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:46,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:46,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:46,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:53:46,164 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:46,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash 379572246, now seen corresponding path program 1 times [2024-06-14 11:53:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705306713] [2024-06-14 11:53:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:47,382 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 11:53:47,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705306713] [2024-06-14 11:53:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705306713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:47,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:47,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:53:47,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741495215] [2024-06-14 11:53:47,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:47,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:53:47,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:53:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:53:47,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:53:47,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 491 transitions, 6503 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:53:47,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:47,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:53:47,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:48,802 INFO L124 PetriNetUnfolderBase]: 3516/5726 cut-off events. [2024-06-14 11:53:48,802 INFO L125 PetriNetUnfolderBase]: For 810249/810256 co-relation queries the response was YES. [2024-06-14 11:53:48,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56920 conditions, 5726 events. 3516/5726 cut-off events. For 810249/810256 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35913 event pairs, 679 based on Foata normal form. 8/5699 useless extension candidates. Maximal degree in co-relation 56763. Up to 5095 conditions per place. [2024-06-14 11:53:48,892 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 420 selfloop transitions, 26 changer transitions 0/510 dead transitions. [2024-06-14 11:53:48,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 510 transitions, 7570 flow [2024-06-14 11:53:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:53:48,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:53:48,893 INFO L175 Difference]: Start difference. First operand has 321 places, 491 transitions, 6503 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:53:48,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 510 transitions, 7570 flow [2024-06-14 11:53:50,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 510 transitions, 7291 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 11:53:50,566 INFO L231 Difference]: Finished difference. Result has 322 places, 494 transitions, 6407 flow [2024-06-14 11:53:50,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6407, PETRI_PLACES=322, PETRI_TRANSITIONS=494} [2024-06-14 11:53:50,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 11:53:50,566 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 494 transitions, 6407 flow [2024-06-14 11:53:50,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:53:50,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:50,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:50,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:53:50,567 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:50,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1627076269, now seen corresponding path program 4 times [2024-06-14 11:53:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:50,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223517098] [2024-06-14 11:53:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:50,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:51,562 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 11:53:51,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:51,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223517098] [2024-06-14 11:53:51,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223517098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:51,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:53:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881907981] [2024-06-14 11:53:51,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:53:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:53:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:53:51,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:51,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 494 transitions, 6407 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:51,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:51,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:51,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:53,046 INFO L124 PetriNetUnfolderBase]: 3603/5844 cut-off events. [2024-06-14 11:53:53,047 INFO L125 PetriNetUnfolderBase]: For 818635/818638 co-relation queries the response was YES. [2024-06-14 11:53:53,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57238 conditions, 5844 events. 3603/5844 cut-off events. For 818635/818638 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 36266 event pairs, 674 based on Foata normal form. 6/5847 useless extension candidates. Maximal degree in co-relation 57080. Up to 5030 conditions per place. [2024-06-14 11:53:53,139 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 114 changer transitions 0/515 dead transitions. [2024-06-14 11:53:53,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 515 transitions, 7951 flow [2024-06-14 11:53:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 11:53:53,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 11:53:53,140 INFO L175 Difference]: Start difference. First operand has 322 places, 494 transitions, 6407 flow. Second operand 9 states and 168 transitions. [2024-06-14 11:53:53,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 515 transitions, 7951 flow [2024-06-14 11:53:55,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 515 transitions, 7723 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:55,228 INFO L231 Difference]: Finished difference. Result has 325 places, 494 transitions, 6416 flow [2024-06-14 11:53:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6416, PETRI_PLACES=325, PETRI_TRANSITIONS=494} [2024-06-14 11:53:55,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 11:53:55,229 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 494 transitions, 6416 flow [2024-06-14 11:53:55,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:53:55,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:55,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:53:55,230 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:55,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:55,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1788388409, now seen corresponding path program 4 times [2024-06-14 11:53:55,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:55,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693969547] [2024-06-14 11:53:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:55,939 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 11:53:55,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:55,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693969547] [2024-06-14 11:53:55,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693969547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:55,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:55,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:55,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410926196] [2024-06-14 11:53:55,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:55,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:55,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:55,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:56,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:53:56,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 494 transitions, 6416 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:56,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:56,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:53:56,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:57,428 INFO L124 PetriNetUnfolderBase]: 3613/5847 cut-off events. [2024-06-14 11:53:57,428 INFO L125 PetriNetUnfolderBase]: For 829710/829710 co-relation queries the response was YES. [2024-06-14 11:53:57,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57714 conditions, 5847 events. 3613/5847 cut-off events. For 829710/829710 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36231 event pairs, 681 based on Foata normal form. 2/5825 useless extension candidates. Maximal degree in co-relation 57555. Up to 5150 conditions per place. [2024-06-14 11:53:57,516 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 425 selfloop transitions, 91 changer transitions 0/521 dead transitions. [2024-06-14 11:53:57,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 521 transitions, 7686 flow [2024-06-14 11:53:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:53:57,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:53:57,518 INFO L175 Difference]: Start difference. First operand has 325 places, 494 transitions, 6416 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:53:57,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 521 transitions, 7686 flow [2024-06-14 11:53:59,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 521 transitions, 7426 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:53:59,910 INFO L231 Difference]: Finished difference. Result has 325 places, 497 transitions, 6451 flow [2024-06-14 11:53:59,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6451, PETRI_PLACES=325, PETRI_TRANSITIONS=497} [2024-06-14 11:53:59,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-14 11:53:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 497 transitions, 6451 flow [2024-06-14 11:53:59,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:53:59,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:59,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:53:59,911 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:59,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash 885660102, now seen corresponding path program 4 times [2024-06-14 11:53:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636504654] [2024-06-14 11:53:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:00,893 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 11:54:00,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636504654] [2024-06-14 11:54:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636504654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391784599] [2024-06-14 11:54:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:00,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:00,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:00,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 497 transitions, 6451 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:00,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:00,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:00,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:02,318 INFO L124 PetriNetUnfolderBase]: 3604/5822 cut-off events. [2024-06-14 11:54:02,318 INFO L125 PetriNetUnfolderBase]: For 838490/838490 co-relation queries the response was YES. [2024-06-14 11:54:02,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57660 conditions, 5822 events. 3604/5822 cut-off events. For 838490/838490 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35904 event pairs, 690 based on Foata normal form. 1/5808 useless extension candidates. Maximal degree in co-relation 57501. Up to 5299 conditions per place. [2024-06-14 11:54:02,403 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 442 selfloop transitions, 67 changer transitions 0/514 dead transitions. [2024-06-14 11:54:02,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 514 transitions, 7539 flow [2024-06-14 11:54:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:54:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:54:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 11:54:02,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 11:54:02,405 INFO L175 Difference]: Start difference. First operand has 325 places, 497 transitions, 6451 flow. Second operand 9 states and 158 transitions. [2024-06-14 11:54:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 514 transitions, 7539 flow [2024-06-14 11:54:04,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 514 transitions, 7323 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:04,921 INFO L231 Difference]: Finished difference. Result has 330 places, 497 transitions, 6375 flow [2024-06-14 11:54:04,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6235, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6375, PETRI_PLACES=330, PETRI_TRANSITIONS=497} [2024-06-14 11:54:04,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 11:54:04,922 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 497 transitions, 6375 flow [2024-06-14 11:54:04,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:04,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:54:04,923 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1113411305, now seen corresponding path program 5 times [2024-06-14 11:54:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267675406] [2024-06-14 11:54:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:05,568 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 11:54:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:05,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267675406] [2024-06-14 11:54:05,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267675406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:05,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:05,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:05,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490698288] [2024-06-14 11:54:05,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:05,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:05,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:05,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:05,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 497 transitions, 6375 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:05,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:05,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:05,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:07,076 INFO L124 PetriNetUnfolderBase]: 3614/5837 cut-off events. [2024-06-14 11:54:07,076 INFO L125 PetriNetUnfolderBase]: For 859723/859723 co-relation queries the response was YES. [2024-06-14 11:54:07,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57806 conditions, 5837 events. 3614/5837 cut-off events. For 859723/859723 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36044 event pairs, 676 based on Foata normal form. 2/5815 useless extension candidates. Maximal degree in co-relation 57645. Up to 5151 conditions per place. [2024-06-14 11:54:07,173 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 423 selfloop transitions, 95 changer transitions 0/523 dead transitions. [2024-06-14 11:54:07,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 523 transitions, 7639 flow [2024-06-14 11:54:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:54:07,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:54:07,175 INFO L175 Difference]: Start difference. First operand has 330 places, 497 transitions, 6375 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:54:07,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 523 transitions, 7639 flow [2024-06-14 11:54:09,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 523 transitions, 7410 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 11:54:09,358 INFO L231 Difference]: Finished difference. Result has 329 places, 500 transitions, 6455 flow [2024-06-14 11:54:09,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6455, PETRI_PLACES=329, PETRI_TRANSITIONS=500} [2024-06-14 11:54:09,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 11:54:09,359 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 500 transitions, 6455 flow [2024-06-14 11:54:09,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:09,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:09,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:54:09,360 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:09,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:09,360 INFO L85 PathProgramCache]: Analyzing trace with hash 885659885, now seen corresponding path program 6 times [2024-06-14 11:54:09,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:09,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236572547] [2024-06-14 11:54:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:09,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:10,058 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 11:54:10,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236572547] [2024-06-14 11:54:10,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236572547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:10,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:10,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:10,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799865081] [2024-06-14 11:54:10,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:10,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:10,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:10,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:10,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 500 transitions, 6455 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:10,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:10,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:10,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:11,556 INFO L124 PetriNetUnfolderBase]: 3608/5841 cut-off events. [2024-06-14 11:54:11,556 INFO L125 PetriNetUnfolderBase]: For 869266/869266 co-relation queries the response was YES. [2024-06-14 11:54:11,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57878 conditions, 5841 events. 3608/5841 cut-off events. For 869266/869266 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 36196 event pairs, 680 based on Foata normal form. 2/5819 useless extension candidates. Maximal degree in co-relation 57716. Up to 5124 conditions per place. [2024-06-14 11:54:11,651 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 422 selfloop transitions, 98 changer transitions 0/525 dead transitions. [2024-06-14 11:54:11,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 525 transitions, 7751 flow [2024-06-14 11:54:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:54:11,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 11:54:11,653 INFO L175 Difference]: Start difference. First operand has 329 places, 500 transitions, 6455 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:54:11,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 525 transitions, 7751 flow [2024-06-14 11:54:13,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 525 transitions, 7434 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 11:54:13,674 INFO L231 Difference]: Finished difference. Result has 329 places, 503 transitions, 6458 flow [2024-06-14 11:54:13,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6138, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6458, PETRI_PLACES=329, PETRI_TRANSITIONS=503} [2024-06-14 11:54:13,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 11:54:13,681 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 503 transitions, 6458 flow [2024-06-14 11:54:13,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:13,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:13,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:13,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:54:13,681 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:13,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1757742757, now seen corresponding path program 7 times [2024-06-14 11:54:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999664820] [2024-06-14 11:54:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:14,439 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 11:54:14,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:14,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999664820] [2024-06-14 11:54:14,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999664820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:14,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:14,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578712529] [2024-06-14 11:54:14,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:14,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:14,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:14,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:14,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 503 transitions, 6458 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:14,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:14,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:14,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:15,974 INFO L124 PetriNetUnfolderBase]: 3618/5853 cut-off events. [2024-06-14 11:54:15,974 INFO L125 PetriNetUnfolderBase]: For 887493/887493 co-relation queries the response was YES. [2024-06-14 11:54:16,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58170 conditions, 5853 events. 3618/5853 cut-off events. For 887493/887493 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36314 event pairs, 679 based on Foata normal form. 2/5831 useless extension candidates. Maximal degree in co-relation 58007. Up to 5115 conditions per place. [2024-06-14 11:54:16,058 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 415 selfloop transitions, 107 changer transitions 0/527 dead transitions. [2024-06-14 11:54:16,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 527 transitions, 7744 flow [2024-06-14 11:54:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:54:16,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:54:16,060 INFO L175 Difference]: Start difference. First operand has 329 places, 503 transitions, 6458 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:54:16,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 527 transitions, 7744 flow [2024-06-14 11:54:19,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 527 transitions, 7458 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:19,237 INFO L231 Difference]: Finished difference. Result has 331 places, 506 transitions, 6512 flow [2024-06-14 11:54:19,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6512, PETRI_PLACES=331, PETRI_TRANSITIONS=506} [2024-06-14 11:54:19,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-14 11:54:19,238 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 506 transitions, 6512 flow [2024-06-14 11:54:19,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:19,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:19,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:19,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:54:19,239 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:19,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:19,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1269445062, now seen corresponding path program 5 times [2024-06-14 11:54:19,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:19,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855219833] [2024-06-14 11:54:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:19,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:20,203 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 11:54:20,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:20,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855219833] [2024-06-14 11:54:20,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855219833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:20,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:20,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:20,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71642764] [2024-06-14 11:54:20,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:20,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:20,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:20,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:20,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 506 transitions, 6512 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:20,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:20,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:20,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:21,728 INFO L124 PetriNetUnfolderBase]: 3623/5861 cut-off events. [2024-06-14 11:54:21,729 INFO L125 PetriNetUnfolderBase]: For 900289/900289 co-relation queries the response was YES. [2024-06-14 11:54:21,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58698 conditions, 5861 events. 3623/5861 cut-off events. For 900289/900289 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36328 event pairs, 694 based on Foata normal form. 1/5847 useless extension candidates. Maximal degree in co-relation 58534. Up to 5302 conditions per place. [2024-06-14 11:54:21,812 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 445 selfloop transitions, 73 changer transitions 0/523 dead transitions. [2024-06-14 11:54:21,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 523 transitions, 7664 flow [2024-06-14 11:54:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:54:21,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:54:21,813 INFO L175 Difference]: Start difference. First operand has 331 places, 506 transitions, 6512 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:54:21,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 523 transitions, 7664 flow [2024-06-14 11:54:25,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 523 transitions, 7354 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:25,256 INFO L231 Difference]: Finished difference. Result has 333 places, 509 transitions, 6424 flow [2024-06-14 11:54:25,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6424, PETRI_PLACES=333, PETRI_TRANSITIONS=509} [2024-06-14 11:54:25,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 11:54:25,257 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 509 transitions, 6424 flow [2024-06-14 11:54:25,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:25,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:25,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:25,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:54:25,257 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:25,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash 896759435, now seen corresponding path program 8 times [2024-06-14 11:54:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:25,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180726078] [2024-06-14 11:54:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:25,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:26,233 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 11:54:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180726078] [2024-06-14 11:54:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180726078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:26,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381672983] [2024-06-14 11:54:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:26,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:26,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:26,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:26,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 509 transitions, 6424 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:26,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:26,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:26,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:27,877 INFO L124 PetriNetUnfolderBase]: 3649/5892 cut-off events. [2024-06-14 11:54:27,878 INFO L125 PetriNetUnfolderBase]: For 934641/934641 co-relation queries the response was YES. [2024-06-14 11:54:27,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59326 conditions, 5892 events. 3649/5892 cut-off events. For 934641/934641 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36548 event pairs, 673 based on Foata normal form. 2/5870 useless extension candidates. Maximal degree in co-relation 59161. Up to 5088 conditions per place. [2024-06-14 11:54:27,961 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 404 selfloop transitions, 126 changer transitions 0/535 dead transitions. [2024-06-14 11:54:27,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 535 transitions, 8062 flow [2024-06-14 11:54:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:54:27,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:54:27,962 INFO L175 Difference]: Start difference. First operand has 333 places, 509 transitions, 6424 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:54:27,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 535 transitions, 8062 flow [2024-06-14 11:54:30,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 535 transitions, 7878 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:30,683 INFO L231 Difference]: Finished difference. Result has 335 places, 515 transitions, 6744 flow [2024-06-14 11:54:30,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6744, PETRI_PLACES=335, PETRI_TRANSITIONS=515} [2024-06-14 11:54:30,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-14 11:54:30,686 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 515 transitions, 6744 flow [2024-06-14 11:54:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:30,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:30,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:54:30,687 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1901841824, now seen corresponding path program 6 times [2024-06-14 11:54:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722077770] [2024-06-14 11:54:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:31,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:31,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722077770] [2024-06-14 11:54:31,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722077770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:31,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:31,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:31,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682713054] [2024-06-14 11:54:31,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:31,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:31,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:31,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:31,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 515 transitions, 6744 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:31,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:31,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:31,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:33,266 INFO L124 PetriNetUnfolderBase]: 3654/5896 cut-off events. [2024-06-14 11:54:33,266 INFO L125 PetriNetUnfolderBase]: For 953226/953226 co-relation queries the response was YES. [2024-06-14 11:54:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60157 conditions, 5896 events. 3654/5896 cut-off events. For 953226/953226 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 36541 event pairs, 692 based on Foata normal form. 1/5882 useless extension candidates. Maximal degree in co-relation 59991. Up to 5330 conditions per place. [2024-06-14 11:54:33,350 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 443 selfloop transitions, 85 changer transitions 0/533 dead transitions. [2024-06-14 11:54:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 533 transitions, 7923 flow [2024-06-14 11:54:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 11:54:33,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 11:54:33,352 INFO L175 Difference]: Start difference. First operand has 335 places, 515 transitions, 6744 flow. Second operand 8 states and 146 transitions. [2024-06-14 11:54:33,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 533 transitions, 7923 flow [2024-06-14 11:54:36,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 533 transitions, 7648 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:36,926 INFO L231 Difference]: Finished difference. Result has 340 places, 519 transitions, 6741 flow [2024-06-14 11:54:36,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6469, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6741, PETRI_PLACES=340, PETRI_TRANSITIONS=519} [2024-06-14 11:54:36,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-14 11:54:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 519 transitions, 6741 flow [2024-06-14 11:54:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:36,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:54:36,928 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1901633287, now seen corresponding path program 9 times [2024-06-14 11:54:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342834383] [2024-06-14 11:54:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:37,621 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 11:54:37,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:37,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342834383] [2024-06-14 11:54:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342834383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:37,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:37,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309014256] [2024-06-14 11:54:37,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:37,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:37,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 519 transitions, 6741 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:37,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:37,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:37,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:39,241 INFO L124 PetriNetUnfolderBase]: 3648/5891 cut-off events. [2024-06-14 11:54:39,241 INFO L125 PetriNetUnfolderBase]: For 961998/961998 co-relation queries the response was YES. [2024-06-14 11:54:39,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60003 conditions, 5891 events. 3648/5891 cut-off events. For 961998/961998 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36538 event pairs, 675 based on Foata normal form. 2/5869 useless extension candidates. Maximal degree in co-relation 59834. Up to 5090 conditions per place. [2024-06-14 11:54:39,479 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 406 selfloop transitions, 127 changer transitions 0/538 dead transitions. [2024-06-14 11:54:39,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 538 transitions, 7945 flow [2024-06-14 11:54:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:54:39,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:54:39,481 INFO L175 Difference]: Start difference. First operand has 340 places, 519 transitions, 6741 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:54:39,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 538 transitions, 7945 flow [2024-06-14 11:54:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 538 transitions, 7674 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:42,117 INFO L231 Difference]: Finished difference. Result has 343 places, 519 transitions, 6730 flow [2024-06-14 11:54:42,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6470, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6730, PETRI_PLACES=343, PETRI_TRANSITIONS=519} [2024-06-14 11:54:42,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-14 11:54:42,118 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 519 transitions, 6730 flow [2024-06-14 11:54:42,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:42,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:42,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:42,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:54:42,119 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:42,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2000062010, now seen corresponding path program 7 times [2024-06-14 11:54:42,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:42,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487133822] [2024-06-14 11:54:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:43,040 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 11:54:43,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:43,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487133822] [2024-06-14 11:54:43,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487133822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:43,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:43,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:43,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337842479] [2024-06-14 11:54:43,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:43,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:43,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:43,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:43,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 519 transitions, 6730 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:43,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:43,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:43,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:44,624 INFO L124 PetriNetUnfolderBase]: 3653/5909 cut-off events. [2024-06-14 11:54:44,625 INFO L125 PetriNetUnfolderBase]: For 973707/973710 co-relation queries the response was YES. [2024-06-14 11:54:44,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60323 conditions, 5909 events. 3653/5909 cut-off events. For 973707/973710 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36690 event pairs, 697 based on Foata normal form. 3/5892 useless extension candidates. Maximal degree in co-relation 60153. Up to 5248 conditions per place. [2024-06-14 11:54:44,708 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 422 selfloop transitions, 105 changer transitions 0/532 dead transitions. [2024-06-14 11:54:44,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 532 transitions, 7882 flow [2024-06-14 11:54:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 11:54:44,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 11:54:44,710 INFO L175 Difference]: Start difference. First operand has 343 places, 519 transitions, 6730 flow. Second operand 8 states and 142 transitions. [2024-06-14 11:54:44,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 532 transitions, 7882 flow [2024-06-14 11:54:47,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 532 transitions, 7610 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:54:47,081 INFO L231 Difference]: Finished difference. Result has 344 places, 522 transitions, 6750 flow [2024-06-14 11:54:47,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6458, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6750, PETRI_PLACES=344, PETRI_TRANSITIONS=522} [2024-06-14 11:54:47,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-14 11:54:47,082 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 522 transitions, 6750 flow [2024-06-14 11:54:47,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:47,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:47,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:47,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:54:47,082 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:47,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2000062227, now seen corresponding path program 10 times [2024-06-14 11:54:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:47,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036641726] [2024-06-14 11:54:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:47,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:47,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036641726] [2024-06-14 11:54:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036641726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:47,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:47,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112838848] [2024-06-14 11:54:47,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:47,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:47,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 522 transitions, 6750 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:47,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:47,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:47,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:49,282 INFO L124 PetriNetUnfolderBase]: 3711/6000 cut-off events. [2024-06-14 11:54:49,282 INFO L125 PetriNetUnfolderBase]: For 1034047/1034050 co-relation queries the response was YES. [2024-06-14 11:54:49,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62249 conditions, 6000 events. 3711/6000 cut-off events. For 1034047/1034050 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37354 event pairs, 744 based on Foata normal form. 4/5981 useless extension candidates. Maximal degree in co-relation 62078. Up to 4932 conditions per place. [2024-06-14 11:54:49,379 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 392 selfloop transitions, 156 changer transitions 0/553 dead transitions. [2024-06-14 11:54:49,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 553 transitions, 9094 flow [2024-06-14 11:54:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:54:49,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 11:54:49,381 INFO L175 Difference]: Start difference. First operand has 344 places, 522 transitions, 6750 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:54:49,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 553 transitions, 9094 flow [2024-06-14 11:54:53,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 553 transitions, 8840 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:53,147 INFO L231 Difference]: Finished difference. Result has 346 places, 535 transitions, 7320 flow [2024-06-14 11:54:53,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7320, PETRI_PLACES=346, PETRI_TRANSITIONS=535} [2024-06-14 11:54:53,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-14 11:54:53,148 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 535 transitions, 7320 flow [2024-06-14 11:54:53,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:53,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:53,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:53,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:54:53,148 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:53,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2118040676, now seen corresponding path program 8 times [2024-06-14 11:54:53,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:53,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297871071] [2024-06-14 11:54:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:53,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:54,096 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 11:54:54,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:54,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297871071] [2024-06-14 11:54:54,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297871071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:54,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:54,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:54,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623274661] [2024-06-14 11:54:54,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:54,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:54,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:54:54,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 535 transitions, 7320 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:54,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:54,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:54:54,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:55,765 INFO L124 PetriNetUnfolderBase]: 3721/6021 cut-off events. [2024-06-14 11:54:55,765 INFO L125 PetriNetUnfolderBase]: For 1061722/1061725 co-relation queries the response was YES. [2024-06-14 11:54:55,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63393 conditions, 6021 events. 3721/6021 cut-off events. For 1061722/1061725 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 37576 event pairs, 710 based on Foata normal form. 4/6005 useless extension candidates. Maximal degree in co-relation 63221. Up to 5301 conditions per place. [2024-06-14 11:54:55,854 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 111 changer transitions 0/550 dead transitions. [2024-06-14 11:54:55,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 550 transitions, 8738 flow [2024-06-14 11:54:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 11:54:55,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 11:54:55,855 INFO L175 Difference]: Start difference. First operand has 346 places, 535 transitions, 7320 flow. Second operand 8 states and 146 transitions. [2024-06-14 11:54:55,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 550 transitions, 8738 flow [2024-06-14 11:54:58,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 550 transitions, 8488 flow, removed 92 selfloop flow, removed 2 redundant places. [2024-06-14 11:54:58,973 INFO L231 Difference]: Finished difference. Result has 352 places, 539 transitions, 7393 flow [2024-06-14 11:54:58,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7393, PETRI_PLACES=352, PETRI_TRANSITIONS=539} [2024-06-14 11:54:58,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 11:54:58,974 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 539 transitions, 7393 flow [2024-06-14 11:54:58,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:54:58,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:54:58,975 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:58,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1999616540, now seen corresponding path program 9 times [2024-06-14 11:54:58,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:58,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973794017] [2024-06-14 11:54:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:59,946 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 11:54:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973794017] [2024-06-14 11:54:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973794017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:59,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:59,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:59,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809908879] [2024-06-14 11:54:59,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:59,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:59,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:00,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:00,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 539 transitions, 7393 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:00,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:00,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:00,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:01,549 INFO L124 PetriNetUnfolderBase]: 3726/6022 cut-off events. [2024-06-14 11:55:01,549 INFO L125 PetriNetUnfolderBase]: For 1054288/1054291 co-relation queries the response was YES. [2024-06-14 11:55:01,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62646 conditions, 6022 events. 3726/6022 cut-off events. For 1054288/1054291 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 37463 event pairs, 705 based on Foata normal form. 3/6005 useless extension candidates. Maximal degree in co-relation 62472. Up to 5329 conditions per place. [2024-06-14 11:55:01,634 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 431 selfloop transitions, 118 changer transitions 0/554 dead transitions. [2024-06-14 11:55:01,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 554 transitions, 8810 flow [2024-06-14 11:55:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 11:55:01,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 11:55:01,636 INFO L175 Difference]: Start difference. First operand has 352 places, 539 transitions, 7393 flow. Second operand 8 states and 145 transitions. [2024-06-14 11:55:01,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 554 transitions, 8810 flow [2024-06-14 11:55:04,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 554 transitions, 8558 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:04,920 INFO L231 Difference]: Finished difference. Result has 356 places, 543 transitions, 7488 flow [2024-06-14 11:55:04,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7488, PETRI_PLACES=356, PETRI_TRANSITIONS=543} [2024-06-14 11:55:04,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-14 11:55:04,921 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 543 transitions, 7488 flow [2024-06-14 11:55:04,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:04,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:04,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:55:04,922 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:04,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:04,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1999825077, now seen corresponding path program 11 times [2024-06-14 11:55:04,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80730325] [2024-06-14 11:55:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:04,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:05,632 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 11:55:05,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:05,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80730325] [2024-06-14 11:55:05,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80730325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:05,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:05,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:05,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175810001] [2024-06-14 11:55:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:05,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:05,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:05,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:05,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:05,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 543 transitions, 7488 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:05,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:05,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:05,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:07,280 INFO L124 PetriNetUnfolderBase]: 3720/6017 cut-off events. [2024-06-14 11:55:07,280 INFO L125 PetriNetUnfolderBase]: For 1066753/1066756 co-relation queries the response was YES. [2024-06-14 11:55:07,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62506 conditions, 6017 events. 3720/6017 cut-off events. For 1066753/1066756 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 37494 event pairs, 744 based on Foata normal form. 4/5998 useless extension candidates. Maximal degree in co-relation 62330. Up to 4950 conditions per place. [2024-06-14 11:55:07,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 158 changer transitions 0/559 dead transitions. [2024-06-14 11:55:07,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 559 transitions, 9128 flow [2024-06-14 11:55:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 11:55:07,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 11:55:07,370 INFO L175 Difference]: Start difference. First operand has 356 places, 543 transitions, 7488 flow. Second operand 8 states and 151 transitions. [2024-06-14 11:55:07,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 559 transitions, 9128 flow [2024-06-14 11:55:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 559 transitions, 8778 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:10,705 INFO L231 Difference]: Finished difference. Result has 359 places, 543 transitions, 7460 flow [2024-06-14 11:55:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7460, PETRI_PLACES=359, PETRI_TRANSITIONS=543} [2024-06-14 11:55:10,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 11:55:10,706 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 543 transitions, 7460 flow [2024-06-14 11:55:10,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:10,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:10,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:55:10,707 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:10,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1748829950, now seen corresponding path program 10 times [2024-06-14 11:55:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655327657] [2024-06-14 11:55:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:11,639 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 11:55:11,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:11,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655327657] [2024-06-14 11:55:11,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655327657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:11,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:11,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869124752] [2024-06-14 11:55:11,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:11,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:11,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:11,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:11,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:11,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 543 transitions, 7460 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:11,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:11,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:11,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:13,183 INFO L124 PetriNetUnfolderBase]: 3722/6023 cut-off events. [2024-06-14 11:55:13,184 INFO L125 PetriNetUnfolderBase]: For 1080487/1080490 co-relation queries the response was YES. [2024-06-14 11:55:13,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62670 conditions, 6023 events. 3722/6023 cut-off events. For 1080487/1080490 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 37590 event pairs, 709 based on Foata normal form. 4/6007 useless extension candidates. Maximal degree in co-relation 62493. Up to 5189 conditions per place. [2024-06-14 11:55:13,273 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 401 selfloop transitions, 152 changer transitions 0/558 dead transitions. [2024-06-14 11:55:13,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 558 transitions, 9094 flow [2024-06-14 11:55:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 11:55:13,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 11:55:13,275 INFO L175 Difference]: Start difference. First operand has 359 places, 543 transitions, 7460 flow. Second operand 8 states and 148 transitions. [2024-06-14 11:55:13,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 558 transitions, 9094 flow [2024-06-14 11:55:16,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 558 transitions, 8714 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:16,821 INFO L231 Difference]: Finished difference. Result has 359 places, 546 transitions, 7462 flow [2024-06-14 11:55:16,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7462, PETRI_PLACES=359, PETRI_TRANSITIONS=546} [2024-06-14 11:55:16,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 11:55:16,822 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 546 transitions, 7462 flow [2024-06-14 11:55:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:16,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:16,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:55:16,823 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:16,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash 490037002, now seen corresponding path program 11 times [2024-06-14 11:55:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:16,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978270387] [2024-06-14 11:55:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:17,792 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 11:55:17,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:17,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978270387] [2024-06-14 11:55:17,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978270387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:17,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082922702] [2024-06-14 11:55:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:17,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:17,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:17,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:17,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 546 transitions, 7462 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:17,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:17,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:17,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:19,368 INFO L124 PetriNetUnfolderBase]: 3714/6001 cut-off events. [2024-06-14 11:55:19,368 INFO L125 PetriNetUnfolderBase]: For 1086019/1086022 co-relation queries the response was YES. [2024-06-14 11:55:19,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62255 conditions, 6001 events. 3714/6001 cut-off events. For 1086019/1086022 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 37300 event pairs, 704 based on Foata normal form. 4/5985 useless extension candidates. Maximal degree in co-relation 62079. Up to 5330 conditions per place. [2024-06-14 11:55:19,460 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 454 selfloop transitions, 97 changer transitions 0/556 dead transitions. [2024-06-14 11:55:19,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 556 transitions, 8592 flow [2024-06-14 11:55:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:55:19,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:55:19,461 INFO L175 Difference]: Start difference. First operand has 359 places, 546 transitions, 7462 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:55:19,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 556 transitions, 8592 flow [2024-06-14 11:55:22,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 556 transitions, 8199 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:22,767 INFO L231 Difference]: Finished difference. Result has 362 places, 546 transitions, 7270 flow [2024-06-14 11:55:22,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7270, PETRI_PLACES=362, PETRI_TRANSITIONS=546} [2024-06-14 11:55:22,768 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 11:55:22,768 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 546 transitions, 7270 flow [2024-06-14 11:55:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:22,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:22,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:22,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:55:22,768 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:22,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:22,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2117773549, now seen corresponding path program 12 times [2024-06-14 11:55:22,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:22,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103972683] [2024-06-14 11:55:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:22,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:23,485 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 11:55:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103972683] [2024-06-14 11:55:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103972683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:23,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648719884] [2024-06-14 11:55:23,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:23,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:23,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 546 transitions, 7270 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:23,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:23,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:23,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:25,033 INFO L124 PetriNetUnfolderBase]: 3702/5992 cut-off events. [2024-06-14 11:55:25,033 INFO L125 PetriNetUnfolderBase]: For 1090439/1090442 co-relation queries the response was YES. [2024-06-14 11:55:25,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61504 conditions, 5992 events. 3702/5992 cut-off events. For 1090439/1090442 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 37380 event pairs, 735 based on Foata normal form. 6/5975 useless extension candidates. Maximal degree in co-relation 61327. Up to 4934 conditions per place. [2024-06-14 11:55:25,128 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 411 selfloop transitions, 146 changer transitions 0/562 dead transitions. [2024-06-14 11:55:25,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 562 transitions, 8928 flow [2024-06-14 11:55:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:55:25,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:55:25,129 INFO L175 Difference]: Start difference. First operand has 362 places, 546 transitions, 7270 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:55:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 562 transitions, 8928 flow [2024-06-14 11:55:28,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 562 transitions, 8599 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:28,252 INFO L231 Difference]: Finished difference. Result has 362 places, 546 transitions, 7240 flow [2024-06-14 11:55:28,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6941, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7240, PETRI_PLACES=362, PETRI_TRANSITIONS=546} [2024-06-14 11:55:28,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 11:55:28,253 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 546 transitions, 7240 flow [2024-06-14 11:55:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:28,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:28,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:28,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:55:28,254 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:28,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash 502965862, now seen corresponding path program 12 times [2024-06-14 11:55:28,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:28,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500813454] [2024-06-14 11:55:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:28,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:29,141 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 11:55:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500813454] [2024-06-14 11:55:29,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500813454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:29,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:29,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290094956] [2024-06-14 11:55:29,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:29,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:29,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:29,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:29,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 546 transitions, 7240 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:29,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:29,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:29,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:30,651 INFO L124 PetriNetUnfolderBase]: 3697/5991 cut-off events. [2024-06-14 11:55:30,651 INFO L125 PetriNetUnfolderBase]: For 1084137/1084140 co-relation queries the response was YES. [2024-06-14 11:55:30,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61506 conditions, 5991 events. 3697/5991 cut-off events. For 1084137/1084140 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 37407 event pairs, 707 based on Foata normal form. 3/5974 useless extension candidates. Maximal degree in co-relation 61328. Up to 5160 conditions per place. [2024-06-14 11:55:30,747 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 391 selfloop transitions, 160 changer transitions 0/556 dead transitions. [2024-06-14 11:55:30,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 556 transitions, 8370 flow [2024-06-14 11:55:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 11:55:30,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 11:55:30,748 INFO L175 Difference]: Start difference. First operand has 362 places, 546 transitions, 7240 flow. Second operand 8 states and 145 transitions. [2024-06-14 11:55:30,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 556 transitions, 8370 flow [2024-06-14 11:55:34,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 556 transitions, 7935 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 11:55:34,072 INFO L231 Difference]: Finished difference. Result has 362 places, 546 transitions, 7131 flow [2024-06-14 11:55:34,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6805, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7131, PETRI_PLACES=362, PETRI_TRANSITIONS=546} [2024-06-14 11:55:34,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 11:55:34,073 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 546 transitions, 7131 flow [2024-06-14 11:55:34,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:34,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:34,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:34,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:55:34,074 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:34,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2117650417, now seen corresponding path program 4 times [2024-06-14 11:55:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232242329] [2024-06-14 11:55:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:34,806 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 11:55:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232242329] [2024-06-14 11:55:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232242329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:34,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:34,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:34,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889867927] [2024-06-14 11:55:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:34,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:34,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:34,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:34,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:34,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 546 transitions, 7131 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:34,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:34,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:34,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:36,416 INFO L124 PetriNetUnfolderBase]: 3700/5986 cut-off events. [2024-06-14 11:55:36,416 INFO L125 PetriNetUnfolderBase]: For 1108305/1108308 co-relation queries the response was YES. [2024-06-14 11:55:36,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60979 conditions, 5986 events. 3700/5986 cut-off events. For 1108305/1108308 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 37307 event pairs, 701 based on Foata normal form. 6/5972 useless extension candidates. Maximal degree in co-relation 60801. Up to 5306 conditions per place. [2024-06-14 11:55:36,506 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 457 selfloop transitions, 98 changer transitions 0/560 dead transitions. [2024-06-14 11:55:36,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 560 transitions, 8411 flow [2024-06-14 11:55:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:55:36,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 11:55:36,520 INFO L175 Difference]: Start difference. First operand has 362 places, 546 transitions, 7131 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:55:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 560 transitions, 8411 flow [2024-06-14 11:55:40,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 560 transitions, 8016 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 11:55:40,354 INFO L231 Difference]: Finished difference. Result has 361 places, 549 transitions, 7084 flow [2024-06-14 11:55:40,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7084, PETRI_PLACES=361, PETRI_TRANSITIONS=549} [2024-06-14 11:55:40,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-14 11:55:40,355 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 549 transitions, 7084 flow [2024-06-14 11:55:40,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 11:55:40,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:40,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:40,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:55:40,355 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:40,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:40,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1733582910, now seen corresponding path program 2 times [2024-06-14 11:55:40,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:40,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686777300] [2024-06-14 11:55:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:40,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:41,674 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 11:55:41,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:41,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686777300] [2024-06-14 11:55:41,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686777300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:41,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:41,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103088817] [2024-06-14 11:55:41,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:41,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:55:41,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 549 transitions, 7084 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:55:41,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:41,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:55:41,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:43,347 INFO L124 PetriNetUnfolderBase]: 3612/5855 cut-off events. [2024-06-14 11:55:43,348 INFO L125 PetriNetUnfolderBase]: For 1129037/1129062 co-relation queries the response was YES. [2024-06-14 11:55:43,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60530 conditions, 5855 events. 3612/5855 cut-off events. For 1129037/1129062 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36768 event pairs, 694 based on Foata normal form. 25/5833 useless extension candidates. Maximal degree in co-relation 60353. Up to 5240 conditions per place. [2024-06-14 11:55:43,444 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 470 selfloop transitions, 27 changer transitions 0/568 dead transitions. [2024-06-14 11:55:43,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 568 transitions, 8612 flow [2024-06-14 11:55:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:55:43,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:55:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 11:55:43,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-14 11:55:43,446 INFO L175 Difference]: Start difference. First operand has 361 places, 549 transitions, 7084 flow. Second operand 10 states and 173 transitions. [2024-06-14 11:55:43,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 568 transitions, 8612 flow [2024-06-14 11:55:47,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 568 transitions, 8286 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:47,335 INFO L231 Difference]: Finished difference. Result has 365 places, 555 transitions, 7100 flow [2024-06-14 11:55:47,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7100, PETRI_PLACES=365, PETRI_TRANSITIONS=555} [2024-06-14 11:55:47,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 11:55:47,335 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 555 transitions, 7100 flow [2024-06-14 11:55:47,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:55:47,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:47,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:47,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:55:47,336 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:47,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:47,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2117662321, now seen corresponding path program 5 times [2024-06-14 11:55:47,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680178994] [2024-06-14 11:55:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:48,312 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 11:55:48,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:48,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680178994] [2024-06-14 11:55:48,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680178994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:48,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:48,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935783333] [2024-06-14 11:55:48,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:48,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:48,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:48,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:55:48,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 555 transitions, 7100 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:55:48,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:48,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:55:48,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:49,884 INFO L124 PetriNetUnfolderBase]: 3733/6032 cut-off events. [2024-06-14 11:55:49,885 INFO L125 PetriNetUnfolderBase]: For 1155484/1155487 co-relation queries the response was YES. [2024-06-14 11:55:49,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61757 conditions, 6032 events. 3733/6032 cut-off events. For 1155484/1155487 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37570 event pairs, 701 based on Foata normal form. 6/6018 useless extension candidates. Maximal degree in co-relation 61579. Up to 5346 conditions per place. [2024-06-14 11:55:49,982 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 463 selfloop transitions, 103 changer transitions 0/571 dead transitions. [2024-06-14 11:55:49,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 571 transitions, 8432 flow [2024-06-14 11:55:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 11:55:49,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 11:55:49,983 INFO L175 Difference]: Start difference. First operand has 365 places, 555 transitions, 7100 flow. Second operand 9 states and 160 transitions. [2024-06-14 11:55:49,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 571 transitions, 8432 flow [2024-06-14 11:55:54,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 571 transitions, 8251 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:54,292 INFO L231 Difference]: Finished difference. Result has 368 places, 559 transitions, 7292 flow [2024-06-14 11:55:54,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6919, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7292, PETRI_PLACES=368, PETRI_TRANSITIONS=559} [2024-06-14 11:55:54,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 11:55:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 559 transitions, 7292 flow [2024-06-14 11:55:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:55:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:54,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:55:54,293 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:55:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1734087900, now seen corresponding path program 3 times [2024-06-14 11:55:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526684253] [2024-06-14 11:55:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526684253] [2024-06-14 11:55:55,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526684253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:55,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:55,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:55,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494566705] [2024-06-14 11:55:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:55,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:55,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:55,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:55:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 559 transitions, 7292 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:55:55,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:55,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:55:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:57,223 INFO L124 PetriNetUnfolderBase]: 3629/5883 cut-off events. [2024-06-14 11:55:57,223 INFO L125 PetriNetUnfolderBase]: For 1163355/1163380 co-relation queries the response was YES. [2024-06-14 11:55:57,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61351 conditions, 5883 events. 3629/5883 cut-off events. For 1163355/1163380 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 36946 event pairs, 693 based on Foata normal form. 25/5861 useless extension candidates. Maximal degree in co-relation 61171. Up to 5267 conditions per place. [2024-06-14 11:55:57,319 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 477 selfloop transitions, 21 changer transitions 0/570 dead transitions. [2024-06-14 11:55:57,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 570 transitions, 8318 flow [2024-06-14 11:55:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 11:55:57,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 11:55:57,320 INFO L175 Difference]: Start difference. First operand has 368 places, 559 transitions, 7292 flow. Second operand 9 states and 156 transitions. [2024-06-14 11:55:57,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 570 transitions, 8318 flow [2024-06-14 11:56:02,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 570 transitions, 7881 flow, removed 118 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:02,050 INFO L231 Difference]: Finished difference. Result has 370 places, 559 transitions, 6903 flow [2024-06-14 11:56:02,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6903, PETRI_PLACES=370, PETRI_TRANSITIONS=559} [2024-06-14 11:56:02,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 326 predicate places. [2024-06-14 11:56:02,050 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 559 transitions, 6903 flow [2024-06-14 11:56:02,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:56:02,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:02,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:02,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:56:02,051 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:02,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash 503258037, now seen corresponding path program 6 times [2024-06-14 11:56:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:02,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748942215] [2024-06-14 11:56:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:02,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:03,121 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 11:56:03,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:03,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748942215] [2024-06-14 11:56:03,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748942215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:03,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:03,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:03,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762235593] [2024-06-14 11:56:03,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:03,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:03,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:56:03,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 559 transitions, 6903 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:03,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:03,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:56:03,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:04,702 INFO L124 PetriNetUnfolderBase]: 3758/6070 cut-off events. [2024-06-14 11:56:04,702 INFO L125 PetriNetUnfolderBase]: For 1183442/1183445 co-relation queries the response was YES. [2024-06-14 11:56:04,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62605 conditions, 6070 events. 3758/6070 cut-off events. For 1183442/1183445 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 37860 event pairs, 725 based on Foata normal form. 4/6071 useless extension candidates. Maximal degree in co-relation 62424. Up to 5637 conditions per place. [2024-06-14 11:56:04,799 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 529 selfloop transitions, 48 changer transitions 0/582 dead transitions. [2024-06-14 11:56:04,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 582 transitions, 8647 flow [2024-06-14 11:56:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:04,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 11:56:04,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 11:56:04,800 INFO L175 Difference]: Start difference. First operand has 370 places, 559 transitions, 6903 flow. Second operand 9 states and 156 transitions. [2024-06-14 11:56:04,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 582 transitions, 8647 flow [2024-06-14 11:56:10,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 582 transitions, 8595 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:10,038 INFO L231 Difference]: Finished difference. Result has 373 places, 570 transitions, 7323 flow [2024-06-14 11:56:10,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6851, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7323, PETRI_PLACES=373, PETRI_TRANSITIONS=570} [2024-06-14 11:56:10,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 11:56:10,038 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 570 transitions, 7323 flow [2024-06-14 11:56:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:10,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:10,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:10,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:56:10,039 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:10,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2118050131, now seen corresponding path program 7 times [2024-06-14 11:56:10,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928451482] [2024-06-14 11:56:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:11,109 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 11:56:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928451482] [2024-06-14 11:56:11,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928451482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:11,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:11,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:11,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104785446] [2024-06-14 11:56:11,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:11,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:11,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:11,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:56:11,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 570 transitions, 7323 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:11,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:11,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:56:11,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:12,723 INFO L124 PetriNetUnfolderBase]: 3830/6178 cut-off events. [2024-06-14 11:56:12,723 INFO L125 PetriNetUnfolderBase]: For 1269565/1269568 co-relation queries the response was YES. [2024-06-14 11:56:12,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 6178 events. 3830/6178 cut-off events. For 1269565/1269568 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 38625 event pairs, 702 based on Foata normal form. 6/6164 useless extension candidates. Maximal degree in co-relation 65566. Up to 5366 conditions per place. [2024-06-14 11:56:12,826 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 464 selfloop transitions, 124 changer transitions 0/593 dead transitions. [2024-06-14 11:56:12,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 593 transitions, 9189 flow [2024-06-14 11:56:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:56:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:56:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 11:56:12,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 11:56:12,827 INFO L175 Difference]: Start difference. First operand has 373 places, 570 transitions, 7323 flow. Second operand 10 states and 177 transitions. [2024-06-14 11:56:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 593 transitions, 9189 flow [2024-06-14 11:56:17,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 593 transitions, 8738 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:17,518 INFO L231 Difference]: Finished difference. Result has 378 places, 578 transitions, 7467 flow [2024-06-14 11:56:17,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6872, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7467, PETRI_PLACES=378, PETRI_TRANSITIONS=578} [2024-06-14 11:56:17,519 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-14 11:56:17,519 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 578 transitions, 7467 flow [2024-06-14 11:56:17,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:17,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:17,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:17,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:56:17,520 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:17,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1748833515, now seen corresponding path program 8 times [2024-06-14 11:56:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:17,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435965064] [2024-06-14 11:56:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:56:18,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:18,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435965064] [2024-06-14 11:56:18,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435965064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:18,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:18,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928793006] [2024-06-14 11:56:18,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:18,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:18,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:18,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:56:18,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 578 transitions, 7467 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:18,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:18,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:56:18,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:20,126 INFO L124 PetriNetUnfolderBase]: 3866/6230 cut-off events. [2024-06-14 11:56:20,126 INFO L125 PetriNetUnfolderBase]: For 1326364/1326367 co-relation queries the response was YES. [2024-06-14 11:56:20,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67053 conditions, 6230 events. 3866/6230 cut-off events. For 1326364/1326367 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 38939 event pairs, 698 based on Foata normal form. 6/6216 useless extension candidates. Maximal degree in co-relation 66868. Up to 5024 conditions per place. [2024-06-14 11:56:20,233 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 407 selfloop transitions, 198 changer transitions 0/610 dead transitions. [2024-06-14 11:56:20,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 610 transitions, 10151 flow [2024-06-14 11:56:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:56:20,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:56:20,234 INFO L175 Difference]: Start difference. First operand has 378 places, 578 transitions, 7467 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:56:20,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 610 transitions, 10151 flow [2024-06-14 11:56:24,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 610 transitions, 9822 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:24,388 INFO L231 Difference]: Finished difference. Result has 383 places, 590 transitions, 8114 flow [2024-06-14 11:56:24,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8114, PETRI_PLACES=383, PETRI_TRANSITIONS=590} [2024-06-14 11:56:24,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-14 11:56:24,389 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 590 transitions, 8114 flow [2024-06-14 11:56:24,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:24,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:24,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:24,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:56:24,391 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:24,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1748820495, now seen corresponding path program 9 times [2024-06-14 11:56:24,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:24,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443640276] [2024-06-14 11:56:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:24,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:25,362 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 11:56:25,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:25,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443640276] [2024-06-14 11:56:25,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443640276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:25,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:25,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:25,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845211613] [2024-06-14 11:56:25,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:25,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:25,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:56:25,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 590 transitions, 8114 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:25,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:25,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:56:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:27,022 INFO L124 PetriNetUnfolderBase]: 3892/6274 cut-off events. [2024-06-14 11:56:27,023 INFO L125 PetriNetUnfolderBase]: For 1349734/1349737 co-relation queries the response was YES. [2024-06-14 11:56:27,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68662 conditions, 6274 events. 3892/6274 cut-off events. For 1349734/1349737 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39348 event pairs, 703 based on Foata normal form. 6/6260 useless extension candidates. Maximal degree in co-relation 68473. Up to 5053 conditions per place. [2024-06-14 11:56:27,131 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 415 selfloop transitions, 197 changer transitions 0/617 dead transitions. [2024-06-14 11:56:27,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 617 transitions, 10658 flow [2024-06-14 11:56:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:56:27,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:56:27,132 INFO L175 Difference]: Start difference. First operand has 383 places, 590 transitions, 8114 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:56:27,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 617 transitions, 10658 flow [2024-06-14 11:56:32,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 617 transitions, 9963 flow, removed 171 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:32,323 INFO L231 Difference]: Finished difference. Result has 387 places, 598 transitions, 8192 flow [2024-06-14 11:56:32,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8192, PETRI_PLACES=387, PETRI_TRANSITIONS=598} [2024-06-14 11:56:32,324 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-14 11:56:32,324 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 598 transitions, 8192 flow [2024-06-14 11:56:32,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:32,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:32,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:32,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:56:32,325 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:32,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1748820030, now seen corresponding path program 4 times [2024-06-14 11:56:32,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:32,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944426000] [2024-06-14 11:56:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:33,435 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 11:56:33,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:33,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944426000] [2024-06-14 11:56:33,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944426000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:33,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:33,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:33,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887057458] [2024-06-14 11:56:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:33,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:33,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:33,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:56:33,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 598 transitions, 8192 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 11:56:33,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:33,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:56:33,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:35,259 INFO L124 PetriNetUnfolderBase]: 3780/6129 cut-off events. [2024-06-14 11:56:35,259 INFO L125 PetriNetUnfolderBase]: For 1325685/1325692 co-relation queries the response was YES. [2024-06-14 11:56:35,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66008 conditions, 6129 events. 3780/6129 cut-off events. For 1325685/1325692 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38761 event pairs, 685 based on Foata normal form. 6/6100 useless extension candidates. Maximal degree in co-relation 65818. Up to 5371 conditions per place. [2024-06-14 11:56:35,357 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 472 selfloop transitions, 58 changer transitions 0/612 dead transitions. [2024-06-14 11:56:35,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 612 transitions, 9448 flow [2024-06-14 11:56:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:56:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:56:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:56:35,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 11:56:35,359 INFO L175 Difference]: Start difference. First operand has 387 places, 598 transitions, 8192 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:56:35,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 612 transitions, 9448 flow [2024-06-14 11:56:41,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 612 transitions, 8987 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 11:56:41,095 INFO L231 Difference]: Finished difference. Result has 390 places, 601 transitions, 8017 flow [2024-06-14 11:56:41,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8017, PETRI_PLACES=390, PETRI_TRANSITIONS=601} [2024-06-14 11:56:41,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 11:56:41,096 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 601 transitions, 8017 flow [2024-06-14 11:56:41,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 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 11:56:41,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:41,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:41,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:56:41,096 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:41,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2118037111, now seen corresponding path program 10 times [2024-06-14 11:56:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:41,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754678991] [2024-06-14 11:56:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:41,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:42,123 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 11:56:42,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754678991] [2024-06-14 11:56:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754678991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:42,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:42,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192588576] [2024-06-14 11:56:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:42,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:42,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:56:42,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 601 transitions, 8017 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:42,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:42,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:56:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:43,841 INFO L124 PetriNetUnfolderBase]: 3891/6272 cut-off events. [2024-06-14 11:56:43,841 INFO L125 PetriNetUnfolderBase]: For 1351392/1351395 co-relation queries the response was YES. [2024-06-14 11:56:43,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66092 conditions, 6272 events. 3891/6272 cut-off events. For 1351392/1351395 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 39309 event pairs, 706 based on Foata normal form. 6/6258 useless extension candidates. Maximal degree in co-relation 65901. Up to 5453 conditions per place. [2024-06-14 11:56:43,951 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 490 selfloop transitions, 125 changer transitions 0/620 dead transitions. [2024-06-14 11:56:43,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 620 transitions, 9730 flow [2024-06-14 11:56:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 11:56:43,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 11:56:43,953 INFO L175 Difference]: Start difference. First operand has 390 places, 601 transitions, 8017 flow. Second operand 9 states and 166 transitions. [2024-06-14 11:56:43,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 620 transitions, 9730 flow [2024-06-14 11:56:49,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 620 transitions, 9484 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 11:56:49,020 INFO L231 Difference]: Finished difference. Result has 392 places, 605 transitions, 8183 flow [2024-06-14 11:56:49,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7773, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8183, PETRI_PLACES=392, PETRI_TRANSITIONS=605} [2024-06-14 11:56:49,021 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 11:56:49,021 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 605 transitions, 8183 flow [2024-06-14 11:56:49,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:56:49,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:49,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:56:49,022 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:49,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:49,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1722362566, now seen corresponding path program 1 times [2024-06-14 11:56:49,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:49,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071369814] [2024-06-14 11:56:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:50,195 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 11:56:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071369814] [2024-06-14 11:56:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071369814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:50,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128159175] [2024-06-14 11:56:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:50,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:56:50,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 605 transitions, 8183 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:56:50,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:50,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:56:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:52,075 INFO L124 PetriNetUnfolderBase]: 3783/6171 cut-off events. [2024-06-14 11:56:52,075 INFO L125 PetriNetUnfolderBase]: For 1360341/1360346 co-relation queries the response was YES. [2024-06-14 11:56:52,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65920 conditions, 6171 events. 3783/6171 cut-off events. For 1360341/1360346 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 39285 event pairs, 707 based on Foata normal form. 3/6172 useless extension candidates. Maximal degree in co-relation 65729. Up to 5592 conditions per place. [2024-06-14 11:56:52,176 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 577 selfloop transitions, 21 changer transitions 0/629 dead transitions. [2024-06-14 11:56:52,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 629 transitions, 9557 flow [2024-06-14 11:56:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 11:56:52,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 11:56:52,178 INFO L175 Difference]: Start difference. First operand has 392 places, 605 transitions, 8183 flow. Second operand 9 states and 166 transitions. [2024-06-14 11:56:52,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 629 transitions, 9557 flow [2024-06-14 11:56:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 629 transitions, 9211 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 11:56:57,953 INFO L231 Difference]: Finished difference. Result has 395 places, 608 transitions, 7983 flow [2024-06-14 11:56:57,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7837, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7983, PETRI_PLACES=395, PETRI_TRANSITIONS=608} [2024-06-14 11:56:57,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 11:56:57,953 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 608 transitions, 7983 flow [2024-06-14 11:56:57,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:56:57,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:57,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:56:57,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:56:57,954 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:56:57,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1757757420, now seen corresponding path program 2 times [2024-06-14 11:56:57,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:57,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54769367] [2024-06-14 11:56:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:57,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:59,219 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 11:56:59,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:59,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54769367] [2024-06-14 11:56:59,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54769367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:59,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:59,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:56:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093620858] [2024-06-14 11:56:59,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:59,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:56:59,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:56:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:56:59,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:56:59,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 608 transitions, 7983 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:56:59,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:59,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:56:59,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:01,041 INFO L124 PetriNetUnfolderBase]: 3819/6228 cut-off events. [2024-06-14 11:57:01,041 INFO L125 PetriNetUnfolderBase]: For 1398648/1398655 co-relation queries the response was YES. [2024-06-14 11:57:01,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66786 conditions, 6228 events. 3819/6228 cut-off events. For 1398648/1398655 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 39680 event pairs, 704 based on Foata normal form. 8/6233 useless extension candidates. Maximal degree in co-relation 66594. Up to 5629 conditions per place. [2024-06-14 11:57:01,149 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 578 selfloop transitions, 29 changer transitions 0/638 dead transitions. [2024-06-14 11:57:01,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 638 transitions, 9807 flow [2024-06-14 11:57:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:01,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 11:57:01,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 11:57:01,150 INFO L175 Difference]: Start difference. First operand has 395 places, 608 transitions, 7983 flow. Second operand 9 states and 167 transitions. [2024-06-14 11:57:01,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 638 transitions, 9807 flow [2024-06-14 11:57:04,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 638 transitions, 9691 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:04,996 INFO L231 Difference]: Finished difference. Result has 398 places, 619 transitions, 8251 flow [2024-06-14 11:57:04,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7867, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8251, PETRI_PLACES=398, PETRI_TRANSITIONS=619} [2024-06-14 11:57:04,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 11:57:04,997 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 619 transitions, 8251 flow [2024-06-14 11:57:04,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:04,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:04,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:57:04,998 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:04,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1901647950, now seen corresponding path program 3 times [2024-06-14 11:57:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:04,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797842468] [2024-06-14 11:57:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:06,264 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 11:57:06,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797842468] [2024-06-14 11:57:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797842468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:06,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:06,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733518955] [2024-06-14 11:57:06,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:06,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:57:06,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 619 transitions, 8251 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:06,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:06,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:57:06,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:08,087 INFO L124 PetriNetUnfolderBase]: 3838/6264 cut-off events. [2024-06-14 11:57:08,087 INFO L125 PetriNetUnfolderBase]: For 1425132/1425144 co-relation queries the response was YES. [2024-06-14 11:57:08,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67865 conditions, 6264 events. 3838/6264 cut-off events. For 1425132/1425144 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39963 event pairs, 702 based on Foata normal form. 5/6267 useless extension candidates. Maximal degree in co-relation 67671. Up to 5647 conditions per place. [2024-06-14 11:57:08,197 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 578 selfloop transitions, 34 changer transitions 0/643 dead transitions. [2024-06-14 11:57:08,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 643 transitions, 10037 flow [2024-06-14 11:57:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 11:57:08,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 11:57:08,199 INFO L175 Difference]: Start difference. First operand has 398 places, 619 transitions, 8251 flow. Second operand 9 states and 167 transitions. [2024-06-14 11:57:08,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 643 transitions, 10037 flow [2024-06-14 11:57:11,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 643 transitions, 9886 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:11,933 INFO L231 Difference]: Finished difference. Result has 402 places, 626 transitions, 8414 flow [2024-06-14 11:57:11,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8100, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8414, PETRI_PLACES=402, PETRI_TRANSITIONS=626} [2024-06-14 11:57:11,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 11:57:11,934 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 626 transitions, 8414 flow [2024-06-14 11:57:11,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:11,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:57:11,935 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:11,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash -231369040, now seen corresponding path program 1 times [2024-06-14 11:57:11,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614919904] [2024-06-14 11:57:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:13,291 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 11:57:13,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:13,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614919904] [2024-06-14 11:57:13,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614919904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:13,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:13,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:13,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255065070] [2024-06-14 11:57:13,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:13,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:13,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:13,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:57:13,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 626 transitions, 8414 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:57:13,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:13,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:57:13,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:15,083 INFO L124 PetriNetUnfolderBase]: 3967/6393 cut-off events. [2024-06-14 11:57:15,083 INFO L125 PetriNetUnfolderBase]: For 1423749/1423749 co-relation queries the response was YES. [2024-06-14 11:57:15,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69144 conditions, 6393 events. 3967/6393 cut-off events. For 1423749/1423749 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 40175 event pairs, 734 based on Foata normal form. 1/6392 useless extension candidates. Maximal degree in co-relation 68948. Up to 5976 conditions per place. [2024-06-14 11:57:15,198 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 614 selfloop transitions, 21 changer transitions 0/640 dead transitions. [2024-06-14 11:57:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 640 transitions, 9726 flow [2024-06-14 11:57:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 11:57:15,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 11:57:15,199 INFO L175 Difference]: Start difference. First operand has 402 places, 626 transitions, 8414 flow. Second operand 9 states and 151 transitions. [2024-06-14 11:57:15,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 640 transitions, 9726 flow [2024-06-14 11:57:20,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 640 transitions, 9535 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 11:57:20,224 INFO L231 Difference]: Finished difference. Result has 405 places, 626 transitions, 8271 flow [2024-06-14 11:57:20,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8223, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8271, PETRI_PLACES=405, PETRI_TRANSITIONS=626} [2024-06-14 11:57:20,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-14 11:57:20,224 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 626 transitions, 8271 flow [2024-06-14 11:57:20,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:57:20,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:20,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:20,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:57:20,225 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:20,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1534538410, now seen corresponding path program 4 times [2024-06-14 11:57:20,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:20,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899318975] [2024-06-14 11:57:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:57:21,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:21,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899318975] [2024-06-14 11:57:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899318975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:21,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:21,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996684516] [2024-06-14 11:57:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:21,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:57:21,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 626 transitions, 8271 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:21,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:21,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:57:21,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:23,617 INFO L124 PetriNetUnfolderBase]: 3833/6259 cut-off events. [2024-06-14 11:57:23,618 INFO L125 PetriNetUnfolderBase]: For 1452733/1452745 co-relation queries the response was YES. [2024-06-14 11:57:23,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68149 conditions, 6259 events. 3833/6259 cut-off events. For 1452733/1452745 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40001 event pairs, 700 based on Foata normal form. 4/6261 useless extension candidates. Maximal degree in co-relation 67952. Up to 5638 conditions per place. [2024-06-14 11:57:23,734 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 578 selfloop transitions, 42 changer transitions 0/651 dead transitions. [2024-06-14 11:57:23,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 651 transitions, 9745 flow [2024-06-14 11:57:23,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:23,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:23,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 11:57:23,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 11:57:23,736 INFO L175 Difference]: Start difference. First operand has 405 places, 626 transitions, 8271 flow. Second operand 9 states and 164 transitions. [2024-06-14 11:57:23,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 651 transitions, 9745 flow [2024-06-14 11:57:28,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 651 transitions, 9656 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 11:57:28,944 INFO L231 Difference]: Finished difference. Result has 409 places, 636 transitions, 8485 flow [2024-06-14 11:57:28,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8182, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8485, PETRI_PLACES=409, PETRI_TRANSITIONS=636} [2024-06-14 11:57:28,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 11:57:28,945 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 636 transitions, 8485 flow [2024-06-14 11:57:28,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:28,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:28,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:57:28,946 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:28,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:28,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1333748402, now seen corresponding path program 5 times [2024-06-14 11:57:28,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:28,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736388124] [2024-06-14 11:57:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:28,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:30,127 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 11:57:30,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:30,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736388124] [2024-06-14 11:57:30,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736388124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:30,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:30,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:30,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949133563] [2024-06-14 11:57:30,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:30,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:30,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:57:30,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 636 transitions, 8485 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:30,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:30,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:57:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:31,891 INFO L124 PetriNetUnfolderBase]: 3863/6317 cut-off events. [2024-06-14 11:57:31,891 INFO L125 PetriNetUnfolderBase]: For 1506741/1506752 co-relation queries the response was YES. [2024-06-14 11:57:31,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69716 conditions, 6317 events. 3863/6317 cut-off events. For 1506741/1506752 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40553 event pairs, 704 based on Foata normal form. 6/6318 useless extension candidates. Maximal degree in co-relation 69516. Up to 5521 conditions per place. [2024-06-14 11:57:31,999 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 533 selfloop transitions, 98 changer transitions 0/662 dead transitions. [2024-06-14 11:57:31,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 662 transitions, 10723 flow [2024-06-14 11:57:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:57:32,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:57:32,001 INFO L175 Difference]: Start difference. First operand has 409 places, 636 transitions, 8485 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:57:32,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 662 transitions, 10723 flow [2024-06-14 11:57:37,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 662 transitions, 10568 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:37,756 INFO L231 Difference]: Finished difference. Result has 414 places, 646 transitions, 8909 flow [2024-06-14 11:57:37,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8909, PETRI_PLACES=414, PETRI_TRANSITIONS=646} [2024-06-14 11:57:37,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 11:57:37,757 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 646 transitions, 8909 flow [2024-06-14 11:57:37,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:37,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:37,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:37,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:57:37,757 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:37,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1341100052, now seen corresponding path program 6 times [2024-06-14 11:57:37,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:37,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010711166] [2024-06-14 11:57:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:37,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:39,043 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 11:57:39,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:39,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010711166] [2024-06-14 11:57:39,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010711166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:39,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:39,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:39,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467108974] [2024-06-14 11:57:39,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:39,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:39,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:39,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:57:39,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 646 transitions, 8909 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:39,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:39,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:57:39,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:41,149 INFO L124 PetriNetUnfolderBase]: 3882/6349 cut-off events. [2024-06-14 11:57:41,149 INFO L125 PetriNetUnfolderBase]: For 1532998/1533009 co-relation queries the response was YES. [2024-06-14 11:57:41,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70968 conditions, 6349 events. 3882/6349 cut-off events. For 1532998/1533009 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40774 event pairs, 705 based on Foata normal form. 5/6350 useless extension candidates. Maximal degree in co-relation 70766. Up to 5698 conditions per place. [2024-06-14 11:57:41,253 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 595 selfloop transitions, 41 changer transitions 0/667 dead transitions. [2024-06-14 11:57:41,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 667 transitions, 10777 flow [2024-06-14 11:57:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 11:57:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 11:57:41,255 INFO L175 Difference]: Start difference. First operand has 414 places, 646 transitions, 8909 flow. Second operand 9 states and 166 transitions. [2024-06-14 11:57:41,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 667 transitions, 10777 flow [2024-06-14 11:57:45,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 667 transitions, 10528 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-14 11:57:45,546 INFO L231 Difference]: Finished difference. Result has 419 places, 653 transitions, 9026 flow [2024-06-14 11:57:45,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8668, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9026, PETRI_PLACES=419, PETRI_TRANSITIONS=653} [2024-06-14 11:57:45,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 11:57:45,547 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 653 transitions, 9026 flow [2024-06-14 11:57:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:45,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:45,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:57:45,547 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:45,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1999600668, now seen corresponding path program 2 times [2024-06-14 11:57:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:45,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872609824] [2024-06-14 11:57:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:45,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:46,899 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 11:57:46,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:46,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872609824] [2024-06-14 11:57:46,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872609824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:46,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:46,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826898887] [2024-06-14 11:57:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:46,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:46,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:47,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:57:47,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 653 transitions, 9026 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:57:47,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:47,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:57:47,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:48,854 INFO L124 PetriNetUnfolderBase]: 4020/6488 cut-off events. [2024-06-14 11:57:48,854 INFO L125 PetriNetUnfolderBase]: For 1514477/1514480 co-relation queries the response was YES. [2024-06-14 11:57:48,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71063 conditions, 6488 events. 4020/6488 cut-off events. For 1514477/1514480 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40958 event pairs, 739 based on Foata normal form. 3/6488 useless extension candidates. Maximal degree in co-relation 70859. Up to 6044 conditions per place. [2024-06-14 11:57:48,972 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 633 selfloop transitions, 26 changer transitions 0/664 dead transitions. [2024-06-14 11:57:48,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 664 transitions, 10374 flow [2024-06-14 11:57:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 11:57:48,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 11:57:48,973 INFO L175 Difference]: Start difference. First operand has 419 places, 653 transitions, 9026 flow. Second operand 9 states and 150 transitions. [2024-06-14 11:57:48,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 664 transitions, 10374 flow [2024-06-14 11:57:56,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 664 transitions, 10157 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-14 11:57:56,080 INFO L231 Difference]: Finished difference. Result has 423 places, 653 transitions, 8867 flow [2024-06-14 11:57:56,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8809, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8867, PETRI_PLACES=423, PETRI_TRANSITIONS=653} [2024-06-14 11:57:56,080 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-14 11:57:56,080 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 653 transitions, 8867 flow [2024-06-14 11:57:56,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:57:56,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:57:56,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:57:56,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:57:56,081 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:57:56,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:57:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1999608604, now seen corresponding path program 7 times [2024-06-14 11:57:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:57:56,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385754560] [2024-06-14 11:57:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:57:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:57:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:57:57,362 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 11:57:57,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:57:57,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385754560] [2024-06-14 11:57:57,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385754560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:57:57,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:57:57,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:57:57,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967010965] [2024-06-14 11:57:57,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:57:57,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:57:57,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:57:57,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:57:57,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:57:57,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 11:57:57,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 653 transitions, 8867 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:57:57,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:57:57,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 11:57:57,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:57:59,310 INFO L124 PetriNetUnfolderBase]: 3863/6322 cut-off events. [2024-06-14 11:57:59,310 INFO L125 PetriNetUnfolderBase]: For 1527772/1527783 co-relation queries the response was YES. [2024-06-14 11:57:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69377 conditions, 6322 events. 3863/6322 cut-off events. For 1527772/1527783 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40633 event pairs, 705 based on Foata normal form. 4/6322 useless extension candidates. Maximal degree in co-relation 69171. Up to 5679 conditions per place. [2024-06-14 11:57:59,426 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 600 selfloop transitions, 43 changer transitions 0/674 dead transitions. [2024-06-14 11:57:59,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 674 transitions, 10413 flow [2024-06-14 11:57:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:57:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:57:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 11:57:59,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 11:57:59,428 INFO L175 Difference]: Start difference. First operand has 423 places, 653 transitions, 8867 flow. Second operand 9 states and 165 transitions. [2024-06-14 11:57:59,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 674 transitions, 10413 flow [2024-06-14 11:58:04,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 674 transitions, 10313 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 11:58:04,693 INFO L231 Difference]: Finished difference. Result has 426 places, 661 transitions, 9077 flow [2024-06-14 11:58:04,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8767, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9077, PETRI_PLACES=426, PETRI_TRANSITIONS=661} [2024-06-14 11:58:04,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 11:58:04,694 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 661 transitions, 9077 flow [2024-06-14 11:58:04,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 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 11:58:04,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:04,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:04,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:58:04,694 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:04,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:04,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1029951389, now seen corresponding path program 1 times [2024-06-14 11:58:04,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:04,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562722524] [2024-06-14 11:58:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:04,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:05,439 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 11:58:05,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562722524] [2024-06-14 11:58:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562722524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:05,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:05,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134026402] [2024-06-14 11:58:05,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:05,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:05,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:58:05,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 661 transitions, 9077 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 11:58:05,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:05,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:58:05,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:07,689 INFO L124 PetriNetUnfolderBase]: 4024/6506 cut-off events. [2024-06-14 11:58:07,689 INFO L125 PetriNetUnfolderBase]: For 1546339/1546344 co-relation queries the response was YES. [2024-06-14 11:58:07,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71113 conditions, 6506 events. 4024/6506 cut-off events. For 1546339/1546344 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41204 event pairs, 680 based on Foata normal form. 6/6508 useless extension candidates. Maximal degree in co-relation 70904. Up to 5726 conditions per place. [2024-06-14 11:58:07,798 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 589 selfloop transitions, 97 changer transitions 0/691 dead transitions. [2024-06-14 11:58:07,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 691 transitions, 10664 flow [2024-06-14 11:58:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:58:07,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 11:58:07,799 INFO L175 Difference]: Start difference. First operand has 426 places, 661 transitions, 9077 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:58:07,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 691 transitions, 10664 flow [2024-06-14 11:58:14,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 691 transitions, 10485 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:14,843 INFO L231 Difference]: Finished difference. Result has 430 places, 664 transitions, 9192 flow [2024-06-14 11:58:14,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8898, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9192, PETRI_PLACES=430, PETRI_TRANSITIONS=664} [2024-06-14 11:58:14,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-14 11:58:14,844 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 664 transitions, 9192 flow [2024-06-14 11:58:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 11:58:14,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:14,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:58:14,845 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:14,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1029801659, now seen corresponding path program 2 times [2024-06-14 11:58:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:14,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517225917] [2024-06-14 11:58:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:58:15,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:15,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517225917] [2024-06-14 11:58:15,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517225917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:15,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:15,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:58:15,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085326761] [2024-06-14 11:58:15,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:15,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:58:15,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:15,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:58:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:58:15,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:58:15,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 664 transitions, 9192 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 11:58:15,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:15,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:58:15,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:17,660 INFO L124 PetriNetUnfolderBase]: 4050/6548 cut-off events. [2024-06-14 11:58:17,661 INFO L125 PetriNetUnfolderBase]: For 1587091/1587096 co-relation queries the response was YES. [2024-06-14 11:58:17,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72223 conditions, 6548 events. 4050/6548 cut-off events. For 1587091/1587096 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 41433 event pairs, 683 based on Foata normal form. 6/6550 useless extension candidates. Maximal degree in co-relation 72012. Up to 5696 conditions per place. [2024-06-14 11:58:17,776 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 569 selfloop transitions, 121 changer transitions 0/695 dead transitions. [2024-06-14 11:58:17,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 695 transitions, 11148 flow [2024-06-14 11:58:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:58:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:58:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:58:17,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-14 11:58:17,777 INFO L175 Difference]: Start difference. First operand has 430 places, 664 transitions, 9192 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:58:17,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 695 transitions, 11148 flow [2024-06-14 11:58:24,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 695 transitions, 10757 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-14 11:58:24,420 INFO L231 Difference]: Finished difference. Result has 429 places, 670 transitions, 9245 flow [2024-06-14 11:58:24,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9245, PETRI_PLACES=429, PETRI_TRANSITIONS=670} [2024-06-14 11:58:24,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 11:58:24,421 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 670 transitions, 9245 flow [2024-06-14 11:58:24,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 11:58:24,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:24,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:24,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:58:24,422 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:24,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1024589009, now seen corresponding path program 3 times [2024-06-14 11:58:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819157413] [2024-06-14 11:58:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:25,188 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 11:58:25,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:25,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819157413] [2024-06-14 11:58:25,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819157413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:25,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:25,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:25,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843653487] [2024-06-14 11:58:25,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:25,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:25,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:58:25,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 670 transitions, 9245 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:25,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:25,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:58:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:27,271 INFO L124 PetriNetUnfolderBase]: 4060/6551 cut-off events. [2024-06-14 11:58:27,271 INFO L125 PetriNetUnfolderBase]: For 1608244/1608247 co-relation queries the response was YES. [2024-06-14 11:58:27,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72410 conditions, 6551 events. 4060/6551 cut-off events. For 1608244/1608247 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41343 event pairs, 686 based on Foata normal form. 4/6551 useless extension candidates. Maximal degree in co-relation 72201. Up to 5776 conditions per place. [2024-06-14 11:58:27,397 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 608 selfloop transitions, 90 changer transitions 0/703 dead transitions. [2024-06-14 11:58:27,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 703 transitions, 10888 flow [2024-06-14 11:58:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:27,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:58:27,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:58:27,399 INFO L175 Difference]: Start difference. First operand has 429 places, 670 transitions, 9245 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:58:27,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 703 transitions, 10888 flow [2024-06-14 11:58:35,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 703 transitions, 10704 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 11:58:35,708 INFO L231 Difference]: Finished difference. Result has 434 places, 673 transitions, 9353 flow [2024-06-14 11:58:35,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9061, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9353, PETRI_PLACES=434, PETRI_TRANSITIONS=673} [2024-06-14 11:58:35,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 11:58:35,709 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 673 transitions, 9353 flow [2024-06-14 11:58:35,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:35,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:35,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:58:35,709 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:35,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1024265152, now seen corresponding path program 1 times [2024-06-14 11:58:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809589937] [2024-06-14 11:58:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:36,589 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 11:58:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809589937] [2024-06-14 11:58:36,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809589937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:36,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:36,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:36,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994749283] [2024-06-14 11:58:36,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:36,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:36,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:36,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:58:36,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 673 transitions, 9353 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:36,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:36,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:58:36,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:38,712 INFO L124 PetriNetUnfolderBase]: 4070/6563 cut-off events. [2024-06-14 11:58:38,713 INFO L125 PetriNetUnfolderBase]: For 1632631/1632634 co-relation queries the response was YES. [2024-06-14 11:58:38,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73045 conditions, 6563 events. 4070/6563 cut-off events. For 1632631/1632634 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 41495 event pairs, 701 based on Foata normal form. 2/6560 useless extension candidates. Maximal degree in co-relation 72834. Up to 5583 conditions per place. [2024-06-14 11:58:38,840 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 560 selfloop transitions, 140 changer transitions 0/705 dead transitions. [2024-06-14 11:58:38,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 705 transitions, 11027 flow [2024-06-14 11:58:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:58:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:58:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:58:38,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 11:58:38,841 INFO L175 Difference]: Start difference. First operand has 434 places, 673 transitions, 9353 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:58:38,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 705 transitions, 11027 flow [2024-06-14 11:58:45,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 705 transitions, 10837 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 11:58:45,635 INFO L231 Difference]: Finished difference. Result has 437 places, 677 transitions, 9618 flow [2024-06-14 11:58:45,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9163, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9618, PETRI_PLACES=437, PETRI_TRANSITIONS=677} [2024-06-14 11:58:45,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-14 11:58:45,636 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 677 transitions, 9618 flow [2024-06-14 11:58:45,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:45,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:45,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:45,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:58:45,636 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:45,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1276335215, now seen corresponding path program 4 times [2024-06-14 11:58:45,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:45,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500933195] [2024-06-14 11:58:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:45,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:46,485 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 11:58:46,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:46,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500933195] [2024-06-14 11:58:46,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500933195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:46,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:46,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548283431] [2024-06-14 11:58:46,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:46,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:46,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:58:46,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 677 transitions, 9618 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:46,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:46,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:58:46,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:58:48,830 INFO L124 PetriNetUnfolderBase]: 4080/6583 cut-off events. [2024-06-14 11:58:48,830 INFO L125 PetriNetUnfolderBase]: For 1663107/1663110 co-relation queries the response was YES. [2024-06-14 11:58:48,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74055 conditions, 6583 events. 4080/6583 cut-off events. For 1663107/1663110 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 41653 event pairs, 684 based on Foata normal form. 4/6583 useless extension candidates. Maximal degree in co-relation 73843. Up to 5776 conditions per place. [2024-06-14 11:58:48,938 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 610 selfloop transitions, 97 changer transitions 0/712 dead transitions. [2024-06-14 11:58:48,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 712 transitions, 11303 flow [2024-06-14 11:58:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:58:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:58:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 11:58:48,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-14 11:58:48,940 INFO L175 Difference]: Start difference. First operand has 437 places, 677 transitions, 9618 flow. Second operand 10 states and 187 transitions. [2024-06-14 11:58:48,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 712 transitions, 11303 flow [2024-06-14 11:58:57,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 712 transitions, 10880 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-14 11:58:57,822 INFO L231 Difference]: Finished difference. Result has 440 places, 680 transitions, 9500 flow [2024-06-14 11:58:57,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9195, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9500, PETRI_PLACES=440, PETRI_TRANSITIONS=680} [2024-06-14 11:58:57,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-14 11:58:57,823 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 680 transitions, 9500 flow [2024-06-14 11:58:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:57,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:58:57,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:58:57,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:58:57,823 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:58:57,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:58:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1024260316, now seen corresponding path program 1 times [2024-06-14 11:58:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:58:57,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683884098] [2024-06-14 11:58:57,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:58:57,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:58:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:58:58,808 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 11:58:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:58:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683884098] [2024-06-14 11:58:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683884098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:58:58,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:58:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:58:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775933944] [2024-06-14 11:58:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:58:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:58:58,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:58:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:58:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:58:58,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:58:58,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 680 transitions, 9500 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:58:58,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:58:58,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:58:58,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:00,956 INFO L124 PetriNetUnfolderBase]: 4148/6701 cut-off events. [2024-06-14 11:59:00,956 INFO L125 PetriNetUnfolderBase]: For 1710433/1710436 co-relation queries the response was YES. [2024-06-14 11:59:01,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74840 conditions, 6701 events. 4148/6701 cut-off events. For 1710433/1710436 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42628 event pairs, 710 based on Foata normal form. 6/6696 useless extension candidates. Maximal degree in co-relation 74627. Up to 5865 conditions per place. [2024-06-14 11:59:01,081 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 615 selfloop transitions, 102 changer transitions 0/722 dead transitions. [2024-06-14 11:59:01,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 722 transitions, 11409 flow [2024-06-14 11:59:01,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:59:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:59:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 11:59:01,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 11:59:01,083 INFO L175 Difference]: Start difference. First operand has 440 places, 680 transitions, 9500 flow. Second operand 10 states and 184 transitions. [2024-06-14 11:59:01,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 722 transitions, 11409 flow [2024-06-14 11:59:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 722 transitions, 11114 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 11:59:10,911 INFO L231 Difference]: Finished difference. Result has 445 places, 700 transitions, 9876 flow [2024-06-14 11:59:10,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9234, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9876, PETRI_PLACES=445, PETRI_TRANSITIONS=700} [2024-06-14 11:59:10,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-14 11:59:10,912 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 700 transitions, 9876 flow [2024-06-14 11:59:10,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:10,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:10,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:10,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:59:10,913 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:10,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:10,913 INFO L85 PathProgramCache]: Analyzing trace with hash 240745090, now seen corresponding path program 1 times [2024-06-14 11:59:10,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:10,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671049087] [2024-06-14 11:59:10,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:10,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:11,809 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 11:59:11,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:11,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671049087] [2024-06-14 11:59:11,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671049087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:11,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:11,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:11,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20873840] [2024-06-14 11:59:11,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:11,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:11,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:11,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:11,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:11,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:59:11,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 700 transitions, 9876 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:11,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:11,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:59:11,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:13,843 INFO L124 PetriNetUnfolderBase]: 4168/6710 cut-off events. [2024-06-14 11:59:13,843 INFO L125 PetriNetUnfolderBase]: For 1737982/1737985 co-relation queries the response was YES. [2024-06-14 11:59:13,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76267 conditions, 6710 events. 4168/6710 cut-off events. For 1737982/1737985 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 42495 event pairs, 685 based on Foata normal form. 6/6713 useless extension candidates. Maximal degree in co-relation 76050. Up to 6062 conditions per place. [2024-06-14 11:59:13,968 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 650 selfloop transitions, 70 changer transitions 0/725 dead transitions. [2024-06-14 11:59:13,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 725 transitions, 11522 flow [2024-06-14 11:59:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:13,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:13,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 11:59:13,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 11:59:13,970 INFO L175 Difference]: Start difference. First operand has 445 places, 700 transitions, 9876 flow. Second operand 9 states and 165 transitions. [2024-06-14 11:59:13,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 725 transitions, 11522 flow [2024-06-14 11:59:21,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 725 transitions, 11266 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-14 11:59:21,095 INFO L231 Difference]: Finished difference. Result has 450 places, 704 transitions, 9877 flow [2024-06-14 11:59:21,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9620, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9877, PETRI_PLACES=450, PETRI_TRANSITIONS=704} [2024-06-14 11:59:21,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-14 11:59:21,096 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 704 transitions, 9877 flow [2024-06-14 11:59:21,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:21,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:21,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:59:21,097 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1545822358, now seen corresponding path program 2 times [2024-06-14 11:59:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195052974] [2024-06-14 11:59:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:22,225 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 11:59:22,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:22,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195052974] [2024-06-14 11:59:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195052974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:22,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:22,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613628828] [2024-06-14 11:59:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:22,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:22,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:22,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:59:22,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 704 transitions, 9877 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:22,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:22,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:59:22,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:24,507 INFO L124 PetriNetUnfolderBase]: 4210/6772 cut-off events. [2024-06-14 11:59:24,507 INFO L125 PetriNetUnfolderBase]: For 1785986/1785989 co-relation queries the response was YES. [2024-06-14 11:59:24,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77420 conditions, 6772 events. 4210/6772 cut-off events. For 1785986/1785989 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 42860 event pairs, 683 based on Foata normal form. 4/6772 useless extension candidates. Maximal degree in co-relation 77202. Up to 5873 conditions per place. [2024-06-14 11:59:24,626 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 605 selfloop transitions, 127 changer transitions 0/737 dead transitions. [2024-06-14 11:59:24,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 737 transitions, 12023 flow [2024-06-14 11:59:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:59:24,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:59:24,628 INFO L175 Difference]: Start difference. First operand has 450 places, 704 transitions, 9877 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:59:24,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 737 transitions, 12023 flow [2024-06-14 11:59:33,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 737 transitions, 11822 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:33,152 INFO L231 Difference]: Finished difference. Result has 453 places, 713 transitions, 10259 flow [2024-06-14 11:59:33,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9676, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10259, PETRI_PLACES=453, PETRI_TRANSITIONS=713} [2024-06-14 11:59:33,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-14 11:59:33,153 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 713 transitions, 10259 flow [2024-06-14 11:59:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:33,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:33,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:59:33,153 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:33,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1019618686, now seen corresponding path program 3 times [2024-06-14 11:59:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399560439] [2024-06-14 11:59:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:34,266 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 11:59:34,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:34,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399560439] [2024-06-14 11:59:34,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399560439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:34,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:34,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:34,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424336864] [2024-06-14 11:59:34,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:34,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:34,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:34,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:59:34,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 713 transitions, 10259 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:34,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:34,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:59:34,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:36,488 INFO L124 PetriNetUnfolderBase]: 4230/6808 cut-off events. [2024-06-14 11:59:36,488 INFO L125 PetriNetUnfolderBase]: For 1845600/1845603 co-relation queries the response was YES. [2024-06-14 11:59:36,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79232 conditions, 6808 events. 4230/6808 cut-off events. For 1845600/1845603 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43216 event pairs, 688 based on Foata normal form. 6/6810 useless extension candidates. Maximal degree in co-relation 79012. Up to 5937 conditions per place. [2024-06-14 11:59:36,621 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 622 selfloop transitions, 115 changer transitions 0/742 dead transitions. [2024-06-14 11:59:36,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 742 transitions, 12062 flow [2024-06-14 11:59:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:59:36,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 11:59:36,622 INFO L175 Difference]: Start difference. First operand has 453 places, 713 transitions, 10259 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:59:36,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 742 transitions, 12062 flow [2024-06-14 11:59:45,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 742 transitions, 11710 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-14 11:59:45,851 INFO L231 Difference]: Finished difference. Result has 457 places, 718 transitions, 10336 flow [2024-06-14 11:59:45,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9955, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10336, PETRI_PLACES=457, PETRI_TRANSITIONS=718} [2024-06-14 11:59:45,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-14 11:59:45,852 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 718 transitions, 10336 flow [2024-06-14 11:59:45,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:45,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:45,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:45,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:59:45,853 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:45,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:45,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1019619089, now seen corresponding path program 5 times [2024-06-14 11:59:45,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:45,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298594838] [2024-06-14 11:59:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:45,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:46,724 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 11:59:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298594838] [2024-06-14 11:59:46,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298594838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:46,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:46,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:59:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414342643] [2024-06-14 11:59:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:59:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:46,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:59:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:59:46,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:59:46,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 718 transitions, 10336 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:46,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:46,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:59:46,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:49,211 INFO L124 PetriNetUnfolderBase]: 4240/6824 cut-off events. [2024-06-14 11:59:49,211 INFO L125 PetriNetUnfolderBase]: For 1849212/1849215 co-relation queries the response was YES. [2024-06-14 11:59:49,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79667 conditions, 6824 events. 4240/6824 cut-off events. For 1849212/1849215 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 43316 event pairs, 688 based on Foata normal form. 4/6824 useless extension candidates. Maximal degree in co-relation 79445. Up to 5955 conditions per place. [2024-06-14 11:59:49,335 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 628 selfloop transitions, 113 changer transitions 0/746 dead transitions. [2024-06-14 11:59:49,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 746 transitions, 12099 flow [2024-06-14 11:59:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:59:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:59:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 11:59:49,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 11:59:49,337 INFO L175 Difference]: Start difference. First operand has 457 places, 718 transitions, 10336 flow. Second operand 9 states and 170 transitions. [2024-06-14 11:59:49,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 746 transitions, 12099 flow [2024-06-14 11:59:55,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 746 transitions, 11767 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 11:59:55,898 INFO L231 Difference]: Finished difference. Result has 459 places, 721 transitions, 10347 flow [2024-06-14 11:59:55,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10004, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10347, PETRI_PLACES=459, PETRI_TRANSITIONS=721} [2024-06-14 11:59:55,899 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-14 11:59:55,899 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 721 transitions, 10347 flow [2024-06-14 11:59:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 11:59:55,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:59:55,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:59:55,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:59:55,900 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:59:55,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:59:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 240732349, now seen corresponding path program 6 times [2024-06-14 11:59:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:59:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114842991] [2024-06-14 11:59:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:59:55,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:59:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:59:56,696 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 11:59:56,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:59:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114842991] [2024-06-14 11:59:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114842991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:59:56,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:59:56,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:59:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620860499] [2024-06-14 11:59:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:59:56,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:59:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:59:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:59:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:59:56,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 11:59:56,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 721 transitions, 10347 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 11:59:56,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:59:56,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 11:59:56,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:59:58,899 INFO L124 PetriNetUnfolderBase]: 4250/6849 cut-off events. [2024-06-14 11:59:58,900 INFO L125 PetriNetUnfolderBase]: For 1874240/1874243 co-relation queries the response was YES. [2024-06-14 11:59:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79868 conditions, 6849 events. 4250/6849 cut-off events. For 1874240/1874243 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 43592 event pairs, 719 based on Foata normal form. 4/6849 useless extension candidates. Maximal degree in co-relation 79645. Up to 5772 conditions per place. [2024-06-14 11:59:59,035 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 587 selfloop transitions, 153 changer transitions 0/745 dead transitions. [2024-06-14 11:59:59,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 745 transitions, 12638 flow [2024-06-14 11:59:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:59:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:59:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:59:59,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 11:59:59,036 INFO L175 Difference]: Start difference. First operand has 459 places, 721 transitions, 10347 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:59:59,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 745 transitions, 12638 flow [2024-06-14 12:00:08,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 745 transitions, 12334 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:08,379 INFO L231 Difference]: Finished difference. Result has 460 places, 724 transitions, 10466 flow [2024-06-14 12:00:08,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10466, PETRI_PLACES=460, PETRI_TRANSITIONS=724} [2024-06-14 12:00:08,381 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-14 12:00:08,381 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 724 transitions, 10466 flow [2024-06-14 12:00:08,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 12:00:08,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:08,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:08,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:00:08,381 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:08,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1942939620, now seen corresponding path program 4 times [2024-06-14 12:00:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:08,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987832587] [2024-06-14 12:00:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:08,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:09,445 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 12:00:09,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:09,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987832587] [2024-06-14 12:00:09,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987832587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:09,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:09,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860892662] [2024-06-14 12:00:09,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:09,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:09,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:09,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:09,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:00:09,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 724 transitions, 10466 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:09,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:09,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:00:09,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:11,885 INFO L124 PetriNetUnfolderBase]: 4270/6867 cut-off events. [2024-06-14 12:00:11,885 INFO L125 PetriNetUnfolderBase]: For 1920903/1920906 co-relation queries the response was YES. [2024-06-14 12:00:12,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80462 conditions, 6867 events. 4270/6867 cut-off events. For 1920903/1920906 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 43554 event pairs, 719 based on Foata normal form. 6/6869 useless extension candidates. Maximal degree in co-relation 80238. Up to 5788 conditions per place. [2024-06-14 12:00:12,047 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 588 selfloop transitions, 156 changer transitions 0/749 dead transitions. [2024-06-14 12:00:12,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 749 transitions, 12528 flow [2024-06-14 12:00:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:00:12,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:00:12,049 INFO L175 Difference]: Start difference. First operand has 460 places, 724 transitions, 10466 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:00:12,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 749 transitions, 12528 flow [2024-06-14 12:00:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 749 transitions, 11969 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:20,865 INFO L231 Difference]: Finished difference. Result has 462 places, 729 transitions, 10415 flow [2024-06-14 12:00:20,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9907, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10415, PETRI_PLACES=462, PETRI_TRANSITIONS=729} [2024-06-14 12:00:20,867 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-14 12:00:20,867 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 729 transitions, 10415 flow [2024-06-14 12:00:20,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:20,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:20,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:20,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:00:20,867 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:20,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1091677416, now seen corresponding path program 2 times [2024-06-14 12:00:20,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:20,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97652909] [2024-06-14 12:00:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:20,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:21,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97652909] [2024-06-14 12:00:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97652909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:21,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138426187] [2024-06-14 12:00:21,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:21,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:22,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:00:22,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 729 transitions, 10415 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:22,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:22,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:00:22,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:24,347 INFO L124 PetriNetUnfolderBase]: 4280/6890 cut-off events. [2024-06-14 12:00:24,347 INFO L125 PetriNetUnfolderBase]: For 1933963/1933966 co-relation queries the response was YES. [2024-06-14 12:00:24,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81083 conditions, 6890 events. 4280/6890 cut-off events. For 1933963/1933966 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 43772 event pairs, 694 based on Foata normal form. 4/6891 useless extension candidates. Maximal degree in co-relation 80859. Up to 6151 conditions per place. [2024-06-14 12:00:24,480 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 653 selfloop transitions, 91 changer transitions 0/749 dead transitions. [2024-06-14 12:00:24,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 749 transitions, 12075 flow [2024-06-14 12:00:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:00:24,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:00:24,482 INFO L175 Difference]: Start difference. First operand has 462 places, 729 transitions, 10415 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:00:24,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 749 transitions, 12075 flow [2024-06-14 12:00:35,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 749 transitions, 11601 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:35,286 INFO L231 Difference]: Finished difference. Result has 464 places, 733 transitions, 10262 flow [2024-06-14 12:00:35,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9941, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10262, PETRI_PLACES=464, PETRI_TRANSITIONS=733} [2024-06-14 12:00:35,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2024-06-14 12:00:35,287 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 733 transitions, 10262 flow [2024-06-14 12:00:35,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:35,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:35,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:35,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:00:35,287 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:35,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:35,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1942933110, now seen corresponding path program 5 times [2024-06-14 12:00:35,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:35,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550689586] [2024-06-14 12:00:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:35,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:36,311 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 12:00:36,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:36,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550689586] [2024-06-14 12:00:36,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550689586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:36,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:36,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462991317] [2024-06-14 12:00:36,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:36,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:36,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:36,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:36,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:36,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:00:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 733 transitions, 10262 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:36,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:00:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:38,696 INFO L124 PetriNetUnfolderBase]: 4290/6895 cut-off events. [2024-06-14 12:00:38,696 INFO L125 PetriNetUnfolderBase]: For 1953633/1953636 co-relation queries the response was YES. [2024-06-14 12:00:38,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80979 conditions, 6895 events. 4290/6895 cut-off events. For 1953633/1953636 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 43757 event pairs, 718 based on Foata normal form. 4/6895 useless extension candidates. Maximal degree in co-relation 80754. Up to 5804 conditions per place. [2024-06-14 12:00:38,860 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 589 selfloop transitions, 163 changer transitions 0/757 dead transitions. [2024-06-14 12:00:38,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 757 transitions, 12314 flow [2024-06-14 12:00:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:00:38,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:00:38,862 INFO L175 Difference]: Start difference. First operand has 464 places, 733 transitions, 10262 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:00:38,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 757 transitions, 12314 flow [2024-06-14 12:00:48,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 757 transitions, 12035 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:00:48,230 INFO L231 Difference]: Finished difference. Result has 466 places, 737 transitions, 10468 flow [2024-06-14 12:00:48,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9983, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10468, PETRI_PLACES=466, PETRI_TRANSITIONS=737} [2024-06-14 12:00:48,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-14 12:00:48,231 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 737 transitions, 10468 flow [2024-06-14 12:00:48,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:48,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:48,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:00:48,232 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:00:48,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1934658900, now seen corresponding path program 6 times [2024-06-14 12:00:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:48,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956067867] [2024-06-14 12:00:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:48,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:49,265 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 12:00:49,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:49,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956067867] [2024-06-14 12:00:49,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956067867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:49,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:49,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:00:49,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858673850] [2024-06-14 12:00:49,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:49,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:00:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:00:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:00:49,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:00:49,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 737 transitions, 10468 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:00:49,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:49,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:00:49,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:51,869 INFO L124 PetriNetUnfolderBase]: 4332/6967 cut-off events. [2024-06-14 12:00:51,869 INFO L125 PetriNetUnfolderBase]: For 2030105/2030108 co-relation queries the response was YES. [2024-06-14 12:00:51,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83423 conditions, 6967 events. 4332/6967 cut-off events. For 2030105/2030108 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 44335 event pairs, 725 based on Foata normal form. 4/6967 useless extension candidates. Maximal degree in co-relation 83197. Up to 5652 conditions per place. [2024-06-14 12:00:52,016 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 571 selfloop transitions, 190 changer transitions 0/766 dead transitions. [2024-06-14 12:00:52,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 766 transitions, 13004 flow [2024-06-14 12:00:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:00:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:00:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:00:52,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:00:52,018 INFO L175 Difference]: Start difference. First operand has 466 places, 737 transitions, 10468 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:00:52,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 766 transitions, 13004 flow [2024-06-14 12:01:01,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 766 transitions, 12547 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:01,441 INFO L231 Difference]: Finished difference. Result has 469 places, 745 transitions, 10764 flow [2024-06-14 12:01:01,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10011, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10764, PETRI_PLACES=469, PETRI_TRANSITIONS=745} [2024-06-14 12:01:01,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-14 12:01:01,442 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 745 transitions, 10764 flow [2024-06-14 12:01:01,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:01,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:01,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:01,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:01:01,443 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:01,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:01,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1942940023, now seen corresponding path program 7 times [2024-06-14 12:01:01,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:01,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833004701] [2024-06-14 12:01:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:01,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:02,382 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 12:01:02,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833004701] [2024-06-14 12:01:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833004701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:02,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:02,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:02,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476315748] [2024-06-14 12:01:02,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:02,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:02,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:02,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:02,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:01:02,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 745 transitions, 10764 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:02,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:02,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:01:02,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:04,672 INFO L124 PetriNetUnfolderBase]: 4342/6985 cut-off events. [2024-06-14 12:01:04,673 INFO L125 PetriNetUnfolderBase]: For 2073138/2073141 co-relation queries the response was YES. [2024-06-14 12:01:04,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85025 conditions, 6985 events. 4342/6985 cut-off events. For 2073138/2073141 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44476 event pairs, 725 based on Foata normal form. 4/6985 useless extension candidates. Maximal degree in co-relation 84797. Up to 5896 conditions per place. [2024-06-14 12:01:04,829 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 610 selfloop transitions, 154 changer transitions 0/769 dead transitions. [2024-06-14 12:01:04,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 769 transitions, 12860 flow [2024-06-14 12:01:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:01:04,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 12:01:04,830 INFO L175 Difference]: Start difference. First operand has 469 places, 745 transitions, 10764 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:01:04,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 769 transitions, 12860 flow [2024-06-14 12:01:14,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 769 transitions, 12501 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:14,810 INFO L231 Difference]: Finished difference. Result has 473 places, 748 transitions, 10831 flow [2024-06-14 12:01:14,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10408, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10831, PETRI_PLACES=473, PETRI_TRANSITIONS=748} [2024-06-14 12:01:14,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-14 12:01:14,811 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 748 transitions, 10831 flow [2024-06-14 12:01:14,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:14,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:14,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:14,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:01:14,812 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:14,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1653041550, now seen corresponding path program 3 times [2024-06-14 12:01:14,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:14,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260851431] [2024-06-14 12:01:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:14,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:16,064 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 12:01:16,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260851431] [2024-06-14 12:01:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260851431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:16,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:16,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:16,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906927519] [2024-06-14 12:01:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:16,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:16,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:01:16,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 748 transitions, 10831 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:16,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:16,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:01:16,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:18,792 INFO L124 PetriNetUnfolderBase]: 4360/7007 cut-off events. [2024-06-14 12:01:18,793 INFO L125 PetriNetUnfolderBase]: For 2107055/2107058 co-relation queries the response was YES. [2024-06-14 12:01:18,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85975 conditions, 7007 events. 4360/7007 cut-off events. For 2107055/2107058 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44593 event pairs, 694 based on Foata normal form. 4/7008 useless extension candidates. Maximal degree in co-relation 85745. Up to 6131 conditions per place. [2024-06-14 12:01:18,960 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 661 selfloop transitions, 123 changer transitions 0/789 dead transitions. [2024-06-14 12:01:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 789 transitions, 13517 flow [2024-06-14 12:01:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:01:18,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:01:18,962 INFO L175 Difference]: Start difference. First operand has 473 places, 748 transitions, 10831 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:01:18,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 789 transitions, 13517 flow [2024-06-14 12:01:29,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 789 transitions, 13226 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:29,300 INFO L231 Difference]: Finished difference. Result has 478 places, 769 transitions, 11321 flow [2024-06-14 12:01:29,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10540, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11321, PETRI_PLACES=478, PETRI_TRANSITIONS=769} [2024-06-14 12:01:29,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-14 12:01:29,301 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 769 transitions, 11321 flow [2024-06-14 12:01:29,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:29,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:29,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:29,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:01:29,301 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:29,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1934361982, now seen corresponding path program 4 times [2024-06-14 12:01:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:29,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20600517] [2024-06-14 12:01:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:30,369 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 12:01:30,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:30,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20600517] [2024-06-14 12:01:30,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20600517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:30,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:30,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:30,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406487164] [2024-06-14 12:01:30,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:30,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:30,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:30,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:30,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:30,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:01:30,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 769 transitions, 11321 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:30,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:30,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:01:30,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:33,604 INFO L124 PetriNetUnfolderBase]: 4366/7008 cut-off events. [2024-06-14 12:01:33,604 INFO L125 PetriNetUnfolderBase]: For 2126064/2126067 co-relation queries the response was YES. [2024-06-14 12:01:33,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85671 conditions, 7008 events. 4366/7008 cut-off events. For 2126064/2126067 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 44521 event pairs, 691 based on Foata normal form. 6/7011 useless extension candidates. Maximal degree in co-relation 85438. Up to 6068 conditions per place. [2024-06-14 12:01:33,829 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 643 selfloop transitions, 143 changer transitions 0/791 dead transitions. [2024-06-14 12:01:33,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 791 transitions, 13445 flow [2024-06-14 12:01:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:33,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:33,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:01:33,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:01:33,830 INFO L175 Difference]: Start difference. First operand has 478 places, 769 transitions, 11321 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:01:33,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 791 transitions, 13445 flow [2024-06-14 12:01:44,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 791 transitions, 13126 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-14 12:01:44,052 INFO L231 Difference]: Finished difference. Result has 484 places, 774 transitions, 11572 flow [2024-06-14 12:01:44,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11002, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11572, PETRI_PLACES=484, PETRI_TRANSITIONS=774} [2024-06-14 12:01:44,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 440 predicate places. [2024-06-14 12:01:44,053 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 774 transitions, 11572 flow [2024-06-14 12:01:44,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:44,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:44,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:44,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:01:44,054 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:44,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:44,054 INFO L85 PathProgramCache]: Analyzing trace with hash 862838586, now seen corresponding path program 1 times [2024-06-14 12:01:44,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:44,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907437339] [2024-06-14 12:01:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:44,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:45,035 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 12:01:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907437339] [2024-06-14 12:01:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907437339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:45,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:45,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890234920] [2024-06-14 12:01:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:45,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:45,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:01:45,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:01:45,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 774 transitions, 11572 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:45,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:45,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:01:45,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:47,922 INFO L124 PetriNetUnfolderBase]: 4382/7037 cut-off events. [2024-06-14 12:01:47,923 INFO L125 PetriNetUnfolderBase]: For 2162113/2162118 co-relation queries the response was YES. [2024-06-14 12:01:48,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86486 conditions, 7037 events. 4382/7037 cut-off events. For 2162113/2162118 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 44685 event pairs, 539 based on Foata normal form. 8/7042 useless extension candidates. Maximal degree in co-relation 86250. Up to 6283 conditions per place. [2024-06-14 12:01:48,172 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 729 selfloop transitions, 70 changer transitions 0/804 dead transitions. [2024-06-14 12:01:48,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 804 transitions, 13402 flow [2024-06-14 12:01:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:48,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:01:48,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 12:01:48,173 INFO L175 Difference]: Start difference. First operand has 484 places, 774 transitions, 11572 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:01:48,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 804 transitions, 13402 flow [2024-06-14 12:01:58,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 804 transitions, 13088 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:58,549 INFO L231 Difference]: Finished difference. Result has 487 places, 777 transitions, 11558 flow [2024-06-14 12:01:58,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11258, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11558, PETRI_PLACES=487, PETRI_TRANSITIONS=777} [2024-06-14 12:01:58,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-14 12:01:58,565 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 777 transitions, 11558 flow [2024-06-14 12:01:58,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:01:58,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:58,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:58,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:01:58,566 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:01:58,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1974248174, now seen corresponding path program 2 times [2024-06-14 12:01:58,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242573935] [2024-06-14 12:01:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:59,939 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 12:01:59,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:59,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242573935] [2024-06-14 12:01:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242573935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:59,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:01:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144879402] [2024-06-14 12:01:59,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:59,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:01:59,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:01:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:00,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:02:00,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 777 transitions, 11558 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:00,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:00,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:02:00,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:03,461 INFO L124 PetriNetUnfolderBase]: 4398/7061 cut-off events. [2024-06-14 12:02:03,461 INFO L125 PetriNetUnfolderBase]: For 2191752/2191757 co-relation queries the response was YES. [2024-06-14 12:02:03,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86968 conditions, 7061 events. 4398/7061 cut-off events. For 2191752/2191757 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 44831 event pairs, 674 based on Foata normal form. 8/7066 useless extension candidates. Maximal degree in co-relation 86731. Up to 6343 conditions per place. [2024-06-14 12:02:03,625 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 708 selfloop transitions, 90 changer transitions 0/803 dead transitions. [2024-06-14 12:02:03,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 803 transitions, 13378 flow [2024-06-14 12:02:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:02:03,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:02:03,626 INFO L175 Difference]: Start difference. First operand has 487 places, 777 transitions, 11558 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:02:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 803 transitions, 13378 flow [2024-06-14 12:02:14,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 803 transitions, 13100 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:14,291 INFO L231 Difference]: Finished difference. Result has 489 places, 780 transitions, 11626 flow [2024-06-14 12:02:14,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11280, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11626, PETRI_PLACES=489, PETRI_TRANSITIONS=780} [2024-06-14 12:02:14,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-14 12:02:14,291 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 780 transitions, 11626 flow [2024-06-14 12:02:14,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:14,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:14,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:14,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:02:14,292 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:14,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash -101943042, now seen corresponding path program 3 times [2024-06-14 12:02:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141211498] [2024-06-14 12:02:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:15,444 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 12:02:15,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141211498] [2024-06-14 12:02:15,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141211498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:15,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:15,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:15,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565888954] [2024-06-14 12:02:15,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:15,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:15,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:15,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:02:15,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 780 transitions, 11626 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:02:15,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:18,728 INFO L124 PetriNetUnfolderBase]: 4414/7083 cut-off events. [2024-06-14 12:02:18,729 INFO L125 PetriNetUnfolderBase]: For 2222160/2222165 co-relation queries the response was YES. [2024-06-14 12:02:18,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87488 conditions, 7083 events. 4414/7083 cut-off events. For 2222160/2222165 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 45039 event pairs, 678 based on Foata normal form. 8/7088 useless extension candidates. Maximal degree in co-relation 87250. Up to 6377 conditions per place. [2024-06-14 12:02:18,904 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 709 selfloop transitions, 91 changer transitions 0/805 dead transitions. [2024-06-14 12:02:18,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 805 transitions, 13454 flow [2024-06-14 12:02:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:02:18,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:02:18,906 INFO L175 Difference]: Start difference. First operand has 489 places, 780 transitions, 11626 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:02:18,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 805 transitions, 13454 flow [2024-06-14 12:02:29,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 805 transitions, 13130 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:29,256 INFO L231 Difference]: Finished difference. Result has 491 places, 783 transitions, 11656 flow [2024-06-14 12:02:29,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11302, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11656, PETRI_PLACES=491, PETRI_TRANSITIONS=783} [2024-06-14 12:02:29,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 447 predicate places. [2024-06-14 12:02:29,257 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 783 transitions, 11656 flow [2024-06-14 12:02:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:29,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:29,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:02:29,258 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:29,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1088209756, now seen corresponding path program 4 times [2024-06-14 12:02:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448552299] [2024-06-14 12:02:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:30,434 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 12:02:30,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448552299] [2024-06-14 12:02:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448552299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:30,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:30,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332860174] [2024-06-14 12:02:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:30,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:30,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:30,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:30,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:30,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:02:30,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 783 transitions, 11656 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:30,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:30,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:02:30,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:33,175 INFO L124 PetriNetUnfolderBase]: 4430/7102 cut-off events. [2024-06-14 12:02:33,175 INFO L125 PetriNetUnfolderBase]: For 2250718/2250721 co-relation queries the response was YES. [2024-06-14 12:02:33,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87963 conditions, 7102 events. 4430/7102 cut-off events. For 2250718/2250721 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45126 event pairs, 697 based on Foata normal form. 6/7105 useless extension candidates. Maximal degree in co-relation 87724. Up to 6361 conditions per place. [2024-06-14 12:02:33,324 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 712 selfloop transitions, 86 changer transitions 0/803 dead transitions. [2024-06-14 12:02:33,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 803 transitions, 13468 flow [2024-06-14 12:02:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:33,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:02:33,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:02:33,325 INFO L175 Difference]: Start difference. First operand has 491 places, 783 transitions, 11656 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:02:33,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 803 transitions, 13468 flow [2024-06-14 12:02:44,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 803 transitions, 13136 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:44,760 INFO L231 Difference]: Finished difference. Result has 493 places, 786 transitions, 11674 flow [2024-06-14 12:02:44,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11324, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11674, PETRI_PLACES=493, PETRI_TRANSITIONS=786} [2024-06-14 12:02:44,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-14 12:02:44,761 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 786 transitions, 11674 flow [2024-06-14 12:02:44,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:44,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:44,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:02:44,762 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:44,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1087853566, now seen corresponding path program 5 times [2024-06-14 12:02:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900010701] [2024-06-14 12:02:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:45,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:45,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900010701] [2024-06-14 12:02:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900010701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:45,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:45,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50578952] [2024-06-14 12:02:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:45,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:02:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 786 transitions, 11674 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:02:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:48,508 INFO L124 PetriNetUnfolderBase]: 4446/7128 cut-off events. [2024-06-14 12:02:48,509 INFO L125 PetriNetUnfolderBase]: For 2279232/2279235 co-relation queries the response was YES. [2024-06-14 12:02:48,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88414 conditions, 7128 events. 4446/7128 cut-off events. For 2279232/2279235 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 45323 event pairs, 695 based on Foata normal form. 6/7131 useless extension candidates. Maximal degree in co-relation 88174. Up to 6375 conditions per place. [2024-06-14 12:02:48,649 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 717 selfloop transitions, 85 changer transitions 0/807 dead transitions. [2024-06-14 12:02:48,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 807 transitions, 13502 flow [2024-06-14 12:02:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:02:48,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:02:48,651 INFO L175 Difference]: Start difference. First operand has 493 places, 786 transitions, 11674 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:02:48,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 807 transitions, 13502 flow [2024-06-14 12:02:58,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 807 transitions, 13174 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:58,801 INFO L231 Difference]: Finished difference. Result has 495 places, 789 transitions, 11700 flow [2024-06-14 12:02:58,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11700, PETRI_PLACES=495, PETRI_TRANSITIONS=789} [2024-06-14 12:02:58,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-14 12:02:58,802 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 789 transitions, 11700 flow [2024-06-14 12:02:58,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:02:58,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:58,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:02:58,802 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:02:58,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 847753750, now seen corresponding path program 6 times [2024-06-14 12:02:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:58,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337277286] [2024-06-14 12:02:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:59,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:59,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337277286] [2024-06-14 12:02:59,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337277286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:59,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:59,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:59,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514039184] [2024-06-14 12:02:59,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:59,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:00,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:03:00,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 789 transitions, 11700 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:03:00,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:00,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:03:00,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:02,778 INFO L124 PetriNetUnfolderBase]: 4462/7152 cut-off events. [2024-06-14 12:03:02,778 INFO L125 PetriNetUnfolderBase]: For 2308497/2308500 co-relation queries the response was YES. [2024-06-14 12:03:02,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88898 conditions, 7152 events. 4462/7152 cut-off events. For 2308497/2308500 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 45460 event pairs, 699 based on Foata normal form. 6/7155 useless extension candidates. Maximal degree in co-relation 88657. Up to 6345 conditions per place. [2024-06-14 12:03:02,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 700 selfloop transitions, 104 changer transitions 0/809 dead transitions. [2024-06-14 12:03:02,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 809 transitions, 13536 flow [2024-06-14 12:03:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:03:02,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:03:02,922 INFO L175 Difference]: Start difference. First operand has 495 places, 789 transitions, 11700 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:03:02,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 809 transitions, 13536 flow [2024-06-14 12:03:14,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 809 transitions, 13204 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:14,128 INFO L231 Difference]: Finished difference. Result has 497 places, 792 transitions, 11766 flow [2024-06-14 12:03:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11368, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11766, PETRI_PLACES=497, PETRI_TRANSITIONS=792} [2024-06-14 12:03:14,129 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-14 12:03:14,129 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 792 transitions, 11766 flow [2024-06-14 12:03:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:03:14,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:14,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:14,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:03:14,129 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:14,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash 848184712, now seen corresponding path program 1 times [2024-06-14 12:03:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:14,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366972295] [2024-06-14 12:03:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:14,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:15,391 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 12:03:15,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:15,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366972295] [2024-06-14 12:03:15,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366972295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:15,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:15,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:15,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113284962] [2024-06-14 12:03:15,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:15,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:15,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:15,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:15,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:15,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:03:15,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 792 transitions, 11766 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 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 12:03:15,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:15,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:03:15,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:18,230 INFO L124 PetriNetUnfolderBase]: 4341/7000 cut-off events. [2024-06-14 12:03:18,230 INFO L125 PetriNetUnfolderBase]: For 2321202/2321209 co-relation queries the response was YES. [2024-06-14 12:03:18,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88064 conditions, 7000 events. 4341/7000 cut-off events. For 2321202/2321209 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 45025 event pairs, 701 based on Foata normal form. 9/6974 useless extension candidates. Maximal degree in co-relation 87822. Up to 6168 conditions per place. [2024-06-14 12:03:18,374 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 684 selfloop transitions, 30 changer transitions 0/813 dead transitions. [2024-06-14 12:03:18,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 813 transitions, 13424 flow [2024-06-14 12:03:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:03:18,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 12:03:18,396 INFO L175 Difference]: Start difference. First operand has 497 places, 792 transitions, 11766 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:03:18,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 813 transitions, 13424 flow [2024-06-14 12:03:29,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 813 transitions, 13048 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-14 12:03:29,737 INFO L231 Difference]: Finished difference. Result has 500 places, 794 transitions, 11625 flow [2024-06-14 12:03:29,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11390, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11625, PETRI_PLACES=500, PETRI_TRANSITIONS=794} [2024-06-14 12:03:29,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 456 predicate places. [2024-06-14 12:03:29,738 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 794 transitions, 11625 flow [2024-06-14 12:03:29,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 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 12:03:29,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:29,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:29,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:03:29,739 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:29,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 836148156, now seen corresponding path program 1 times [2024-06-14 12:03:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:29,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628344459] [2024-06-14 12:03:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:29,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628344459] [2024-06-14 12:03:31,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628344459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:31,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:31,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:03:31,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964204203] [2024-06-14 12:03:31,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:31,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:03:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:03:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:03:31,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:03:31,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 794 transitions, 11625 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 12:03:31,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:31,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:03:31,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:34,416 INFO L124 PetriNetUnfolderBase]: 4470/7162 cut-off events. [2024-06-14 12:03:34,416 INFO L125 PetriNetUnfolderBase]: For 2326916/2326919 co-relation queries the response was YES. [2024-06-14 12:03:34,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88797 conditions, 7162 events. 4470/7162 cut-off events. For 2326916/2326919 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 45552 event pairs, 699 based on Foata normal form. 4/7163 useless extension candidates. Maximal degree in co-relation 88554. Up to 6421 conditions per place. [2024-06-14 12:03:34,572 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 718 selfloop transitions, 91 changer transitions 0/814 dead transitions. [2024-06-14 12:03:34,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 814 transitions, 13375 flow [2024-06-14 12:03:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:03:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:03:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:03:34,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-14 12:03:34,574 INFO L175 Difference]: Start difference. First operand has 500 places, 794 transitions, 11625 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:03:34,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 814 transitions, 13375 flow [2024-06-14 12:03:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 814 transitions, 13146 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-14 12:03:45,878 INFO L231 Difference]: Finished difference. Result has 502 places, 797 transitions, 11673 flow [2024-06-14 12:03:45,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11396, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11673, PETRI_PLACES=502, PETRI_TRANSITIONS=797} [2024-06-14 12:03:45,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 458 predicate places. [2024-06-14 12:03:45,880 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 797 transitions, 11673 flow [2024-06-14 12:03:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states 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 12:03:45,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:03:45,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:03:45,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:03:45,880 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:03:45,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:03:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1841238472, now seen corresponding path program 2 times [2024-06-14 12:03:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:03:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994052377] [2024-06-14 12:03:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:03:45,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:03:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:03:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:03:46,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:03:46,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994052377] [2024-06-14 12:03:46,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994052377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:03:46,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:03:46,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:03:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4634323] [2024-06-14 12:03:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:03:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:03:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:03:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:03:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:03:46,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:03:46,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 797 transitions, 11673 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 12:03:46,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:03:46,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:03:46,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:03:49,630 INFO L124 PetriNetUnfolderBase]: 4475/7153 cut-off events. [2024-06-14 12:03:49,630 INFO L125 PetriNetUnfolderBase]: For 2339405/2339405 co-relation queries the response was YES. [2024-06-14 12:03:49,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89071 conditions, 7153 events. 4475/7153 cut-off events. For 2339405/2339405 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 45385 event pairs, 725 based on Foata normal form. 1/7118 useless extension candidates. Maximal degree in co-relation 88827. Up to 6146 conditions per place. [2024-06-14 12:03:49,777 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 663 selfloop transitions, 158 changer transitions 0/826 dead transitions. [2024-06-14 12:03:49,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 826 transitions, 13583 flow [2024-06-14 12:03:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:03:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:03:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:03:49,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:03:49,778 INFO L175 Difference]: Start difference. First operand has 502 places, 797 transitions, 11673 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:03:49,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 826 transitions, 13583 flow Killed by 15