./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019_tso.oepc.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/mix019_tso.oepc.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/mix019_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix019_tso.oepc.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 12:07:03,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:07:03,751 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:07:03,755 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:07:03,756 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:07:03,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:07:03,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:07:03,792 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:07:03,792 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:07:03,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:07:03,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:07:03,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:07:03,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:07:03,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:07:03,800 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:07:03,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:07:03,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:07:03,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:07:03,801 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:07:03,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:07:03,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:07:03,802 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:07:03,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:07:03,802 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:07:03,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:07:03,803 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:07:03,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:07:03,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:07:03,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:07:03,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:07:03,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:07:03,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:07:03,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:07:03,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:07:03,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:07:03,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:07:03,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:07:03,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:07:03,806 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:07:03,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:07:03,806 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:07:03,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:07:03,807 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:07:03,807 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:07:04,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:07:04,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:07:04,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:07:04,041 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:07:04,042 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:07:04,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019_tso.oepc.i [2024-06-14 12:07:05,157 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:07:05,363 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:07:05,363 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_tso.oepc.i [2024-06-14 12:07:05,380 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c62dab5/7ca00902244546f89ff0127581d72684/FLAG2a73671b9 [2024-06-14 12:07:05,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09c62dab5/7ca00902244546f89ff0127581d72684 [2024-06-14 12:07:05,404 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:07:05,404 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:07:05,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix019_tso.oepc.yml/witness.yml [2024-06-14 12:07:05,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:07:05,570 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:07:05,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:07:05,572 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:07:05,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:07:05,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:07:05" (1/2) ... [2024-06-14 12:07:05,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a65795f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:05, skipping insertion in model container [2024-06-14 12:07:05,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:07:05" (1/2) ... [2024-06-14 12:07:05,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@197f3c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:05, skipping insertion in model container [2024-06-14 12:07:05,580 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:07:05" (2/2) ... [2024-06-14 12:07:05,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a65795f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:07:05, skipping insertion in model container [2024-06-14 12:07:05,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:07:05" (2/2) ... [2024-06-14 12:07:05,580 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:07:05,647 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:07:05,648 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 12:07:05,648 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 12:07:05,648 INFO L97 edCorrectnessWitness]: Location invariant before [L830-L830] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 12:07:05,648 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:07:05,649 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-14 12:07:05,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:07:05,982 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:07:05,992 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:07:06,106 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:07:06,145 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:07:06,146 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:07:06 WrapperNode [2024-06-14 12:07:06,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:07:06,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:07:06,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:07:06,147 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:07:06,152 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,203 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,262 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 145 [2024-06-14 12:07:06,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:07:06,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:07:06,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:07:06,267 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:07:06,275 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,275 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,293 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,312 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 12:07:06,325 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,326 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,344 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,346 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,347 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,349 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:07:06,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:07:06,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:07:06,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:07:06,382 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 12:07:06" (1/1) ... [2024-06-14 12:07:06,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:07:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:07:06,421 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 12:07:06,432 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 12:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:07:06,473 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:07:06,473 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:07:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:07:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:07:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:07:06,474 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:07:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:07:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:07:06,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:07:06,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:07:06,475 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 12:07:06,611 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:07:06,613 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:07:06,950 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:07:06,951 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:07:07,086 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:07:07,113 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:07:07,114 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:07:07 BoogieIcfgContainer [2024-06-14 12:07:07,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:07:07,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:07:07,117 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:07:07,119 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:07:07,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:07:05" (1/4) ... [2024-06-14 12:07:07,120 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659fbecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:07:07, skipping insertion in model container [2024-06-14 12:07:07,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:07:05" (2/4) ... [2024-06-14 12:07:07,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659fbecb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:07:07, skipping insertion in model container [2024-06-14 12:07:07,121 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 12:07:06" (3/4) ... [2024-06-14 12:07:07,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659fbecb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:07:07, skipping insertion in model container [2024-06-14 12:07:07,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:07:07" (4/4) ... [2024-06-14 12:07:07,123 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_tso.oepc.i [2024-06-14 12:07:07,135 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:07:07,135 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:07:07,135 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:07:07,174 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:07:07,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:07:07,224 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:07:07,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:07:07,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:07:07,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:07:07,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:07:07,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:07:07,244 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;@4a01597b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:07:07,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:07:07,249 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:07:07,249 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:07:07,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:07:07,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:07,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:07:07,250 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 12:07:07,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1277020543, now seen corresponding path program 1 times [2024-06-14 12:07:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952056456] [2024-06-14 12:07:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:08,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:08,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952056456] [2024-06-14 12:07:08,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952056456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:08,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:08,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:07:08,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533656571] [2024-06-14 12:07:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:08,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:07:08,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:07:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:07:08,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:07:08,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:08,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:08,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:07:08,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:08,648 INFO L124 PetriNetUnfolderBase]: 1156/1874 cut-off events. [2024-06-14 12:07:08,664 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-14 12:07:08,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3703 conditions, 1874 events. 1156/1874 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9336 event pairs, 805 based on Foata normal form. 1/1802 useless extension candidates. Maximal degree in co-relation 3688. Up to 1740 conditions per place. [2024-06-14 12:07:08,681 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:07:08,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-14 12:07:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:07:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:07:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-14 12:07:08,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 12:07:08,694 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-14 12:07:08,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-14 12:07:08,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:08,699 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:07:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 12:07:08,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:07:08,704 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:07:08,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:08,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:08,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:08,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:07:08,705 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 12:07:08,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1143930976, now seen corresponding path program 1 times [2024-06-14 12:07:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:08,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434693906] [2024-06-14 12:07:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:09,495 INFO 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 12:07:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:09,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434693906] [2024-06-14 12:07:09,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434693906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:09,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:09,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:07:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510288575] [2024-06-14 12:07:09,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:09,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:07:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:07:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:07:09,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:07:09,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:09,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:09,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:07:09,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:09,832 INFO L124 PetriNetUnfolderBase]: 1357/2119 cut-off events. [2024-06-14 12:07:09,832 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-14 12:07:09,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4788 conditions, 2119 events. 1357/2119 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10242 event pairs, 840 based on Foata normal form. 3/2119 useless extension candidates. Maximal degree in co-relation 4773. Up to 2013 conditions per place. [2024-06-14 12:07:09,841 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 12:07:09,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-14 12:07:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:07:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:07:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-14 12:07:09,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 12:07:09,846 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-14 12:07:09,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-14 12:07:09,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:07:09,849 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:07:09,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:07:09,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:07:09,850 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:07:09,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:09,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:09,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:09,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:07:09,853 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 12:07:09,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:09,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1102122766, now seen corresponding path program 1 times [2024-06-14 12:07:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:09,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315369685] [2024-06-14 12:07:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:09,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:10,467 INFO 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 12:07:10,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:10,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315369685] [2024-06-14 12:07:10,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315369685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:10,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:10,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:07:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983867999] [2024-06-14 12:07:10,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:10,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:07:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:07:10,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:07:10,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:07:10,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:10,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:10,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:07:10,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:10,820 INFO L124 PetriNetUnfolderBase]: 1345/2103 cut-off events. [2024-06-14 12:07:10,820 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-06-14 12:07:10,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5277 conditions, 2103 events. 1345/2103 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10144 event pairs, 592 based on Foata normal form. 6/2106 useless extension candidates. Maximal degree in co-relation 5260. Up to 1965 conditions per place. [2024-06-14 12:07:10,831 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-14 12:07:10,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 326 flow [2024-06-14 12:07:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:07:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:07:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 12:07:10,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 12:07:10,836 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 112 transitions. [2024-06-14 12:07:10,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 326 flow [2024-06-14 12:07:10,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:10,839 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-14 12:07:10,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-14 12:07:10,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-14 12:07:10,841 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-14 12:07:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:10,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:10,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:10,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:07:10,842 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 12:07:10,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1716914867, now seen corresponding path program 1 times [2024-06-14 12:07:10,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725596149] [2024-06-14 12:07:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:10,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:11,852 INFO 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 12:07:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725596149] [2024-06-14 12:07:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725596149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:11,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:11,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298142559] [2024-06-14 12:07:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:11,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:11,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:07:11,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:11,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:11,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:07:11,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:12,357 INFO L124 PetriNetUnfolderBase]: 1336/2086 cut-off events. [2024-06-14 12:07:12,357 INFO L125 PetriNetUnfolderBase]: For 2056/2056 co-relation queries the response was YES. [2024-06-14 12:07:12,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5744 conditions, 2086 events. 1336/2086 cut-off events. For 2056/2056 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10077 event pairs, 450 based on Foata normal form. 6/2089 useless extension candidates. Maximal degree in co-relation 5726. Up to 1920 conditions per place. [2024-06-14 12:07:12,367 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-14 12:07:12,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 380 flow [2024-06-14 12:07:12,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 12:07:12,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-14 12:07:12,368 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 128 transitions. [2024-06-14 12:07:12,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 380 flow [2024-06-14 12:07:12,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 356 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:12,371 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-14 12:07:12,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-14 12:07:12,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 12:07:12,372 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-14 12:07:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:12,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:12,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:07:12,373 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 12:07:12,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2100828532, now seen corresponding path program 1 times [2024-06-14 12:07:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:12,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241327264] [2024-06-14 12:07:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:12,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:12,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241327264] [2024-06-14 12:07:12,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241327264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:12,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:12,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:07:12,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542401311] [2024-06-14 12:07:12,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:12,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:07:12,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:12,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:07:12,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:07:13,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:07:13,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:13,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:13,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:07:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:13,333 INFO L124 PetriNetUnfolderBase]: 1124/1900 cut-off events. [2024-06-14 12:07:13,334 INFO L125 PetriNetUnfolderBase]: For 2652/2652 co-relation queries the response was YES. [2024-06-14 12:07:13,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5372 conditions, 1900 events. 1124/1900 cut-off events. For 2652/2652 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9817 event pairs, 527 based on Foata normal form. 2/1892 useless extension candidates. Maximal degree in co-relation 5353. Up to 1682 conditions per place. [2024-06-14 12:07:13,344 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-14 12:07:13,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 339 flow [2024-06-14 12:07:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:07:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:07:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-14 12:07:13,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:07:13,346 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 95 transitions. [2024-06-14 12:07:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 339 flow [2024-06-14 12:07:13,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 306 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:13,349 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-14 12:07:13,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 12:07:13,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 12:07:13,350 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-14 12:07:13,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:13,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:13,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:13,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:07:13,350 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 12:07:13,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:13,351 INFO L85 PathProgramCache]: Analyzing trace with hash 476472641, now seen corresponding path program 1 times [2024-06-14 12:07:13,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:13,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212876224] [2024-06-14 12:07:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:13,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:14,022 INFO 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 12:07:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212876224] [2024-06-14 12:07:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212876224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:14,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:14,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:14,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303991019] [2024-06-14 12:07:14,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:14,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:14,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:14,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:14,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:14,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:14,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:14,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:14,496 INFO L124 PetriNetUnfolderBase]: 1342/2120 cut-off events. [2024-06-14 12:07:14,497 INFO L125 PetriNetUnfolderBase]: For 4395/4395 co-relation queries the response was YES. [2024-06-14 12:07:14,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 2120 events. 1342/2120 cut-off events. For 4395/4395 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10275 event pairs, 626 based on Foata normal form. 2/2119 useless extension candidates. Maximal degree in co-relation 6570. Up to 1980 conditions per place. [2024-06-14 12:07:14,509 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-14 12:07:14,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 396 flow [2024-06-14 12:07:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:07:14,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:07:14,511 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:07:14,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 396 flow [2024-06-14 12:07:14,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 374 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:14,514 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 240 flow [2024-06-14 12:07:14,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-14 12:07:14,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-14 12:07:14,515 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 240 flow [2024-06-14 12:07:14,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:14,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:14,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:14,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:07:14,516 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 12:07:14,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash -996192821, now seen corresponding path program 2 times [2024-06-14 12:07:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:14,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753130691] [2024-06-14 12:07:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:14,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:15,175 INFO 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 12:07:15,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:15,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753130691] [2024-06-14 12:07:15,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753130691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:15,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:15,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490828295] [2024-06-14 12:07:15,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:15,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:15,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:15,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:15,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:15,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:15,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:15,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:15,639 INFO L124 PetriNetUnfolderBase]: 1337/2124 cut-off events. [2024-06-14 12:07:15,639 INFO L125 PetriNetUnfolderBase]: For 5954/5966 co-relation queries the response was YES. [2024-06-14 12:07:15,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7075 conditions, 2124 events. 1337/2124 cut-off events. For 5954/5966 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10380 event pairs, 627 based on Foata normal form. 10/2129 useless extension candidates. Maximal degree in co-relation 7053. Up to 1955 conditions per place. [2024-06-14 12:07:15,649 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 46 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2024-06-14 12:07:15,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 428 flow [2024-06-14 12:07:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:07:15,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-14 12:07:15,651 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 240 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:07:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 428 flow [2024-06-14 12:07:15,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 396 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:15,653 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 280 flow [2024-06-14 12:07:15,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-14 12:07:15,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 12:07:15,654 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 280 flow [2024-06-14 12:07:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:15,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:15,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:15,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:07:15,655 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 12:07:15,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:15,655 INFO L85 PathProgramCache]: Analyzing trace with hash 458813367, now seen corresponding path program 1 times [2024-06-14 12:07:15,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:15,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247952265] [2024-06-14 12:07:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:15,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:16,646 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 12:07:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247952265] [2024-06-14 12:07:16,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247952265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:16,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:16,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:16,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672521867] [2024-06-14 12:07:16,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:16,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:16,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:16,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:16,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:16,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:16,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:16,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:16,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:17,119 INFO L124 PetriNetUnfolderBase]: 1377/2267 cut-off events. [2024-06-14 12:07:17,120 INFO L125 PetriNetUnfolderBase]: For 7558/7558 co-relation queries the response was YES. [2024-06-14 12:07:17,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 2267 events. 1377/2267 cut-off events. For 7558/7558 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11484 event pairs, 625 based on Foata normal form. 2/2255 useless extension candidates. Maximal degree in co-relation 7760. Up to 2033 conditions per place. [2024-06-14 12:07:17,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2024-06-14 12:07:17,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 511 flow [2024-06-14 12:07:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:07:17,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-14 12:07:17,133 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 280 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:07:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 511 flow [2024-06-14 12:07:17,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 460 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:17,137 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 316 flow [2024-06-14 12:07:17,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=316, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-14 12:07:17,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-14 12:07:17,138 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 316 flow [2024-06-14 12:07:17,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:17,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:17,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:17,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:07:17,139 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 12:07:17,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1542312761, now seen corresponding path program 1 times [2024-06-14 12:07:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:17,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295770606] [2024-06-14 12:07:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:17,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:17,859 INFO 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 12:07:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:17,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295770606] [2024-06-14 12:07:17,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295770606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492007862] [2024-06-14 12:07:17,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:17,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:17,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:17,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 316 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:17,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:18,413 INFO L124 PetriNetUnfolderBase]: 1589/2489 cut-off events. [2024-06-14 12:07:18,413 INFO L125 PetriNetUnfolderBase]: For 11563/11563 co-relation queries the response was YES. [2024-06-14 12:07:18,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 2489 events. 1589/2489 cut-off events. For 11563/11563 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12281 event pairs, 554 based on Foata normal form. 4/2488 useless extension candidates. Maximal degree in co-relation 9501. Up to 2295 conditions per place. [2024-06-14 12:07:18,429 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 67 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-14 12:07:18,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 590 flow [2024-06-14 12:07:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:07:18,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-14 12:07:18,431 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 316 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:07:18,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 590 flow [2024-06-14 12:07:18,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 550 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:18,436 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 370 flow [2024-06-14 12:07:18,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-14 12:07:18,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-14 12:07:18,437 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 370 flow [2024-06-14 12:07:18,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:18,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:18,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:18,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:07:18,437 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 12:07:18,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:18,438 INFO L85 PathProgramCache]: Analyzing trace with hash 305035251, now seen corresponding path program 2 times [2024-06-14 12:07:18,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:18,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706034202] [2024-06-14 12:07:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:18,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:19,187 INFO 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 12:07:19,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:19,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706034202] [2024-06-14 12:07:19,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706034202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:19,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:19,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:19,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678307274] [2024-06-14 12:07:19,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:19,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:19,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:19,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 370 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:19,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:19,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:19,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:19,673 INFO L124 PetriNetUnfolderBase]: 1669/2589 cut-off events. [2024-06-14 12:07:19,674 INFO L125 PetriNetUnfolderBase]: For 15268/15268 co-relation queries the response was YES. [2024-06-14 12:07:19,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10879 conditions, 2589 events. 1669/2589 cut-off events. For 15268/15268 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12751 event pairs, 557 based on Foata normal form. 8/2594 useless extension candidates. Maximal degree in co-relation 10852. Up to 2297 conditions per place. [2024-06-14 12:07:19,688 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-14 12:07:19,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 748 flow [2024-06-14 12:07:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:07:19,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-14 12:07:19,690 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 370 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:07:19,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 748 flow [2024-06-14 12:07:19,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 706 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:19,701 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 486 flow [2024-06-14 12:07:19,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-14 12:07:19,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-14 12:07:19,702 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 486 flow [2024-06-14 12:07:19,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:19,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:19,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:19,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:07:19,703 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 12:07:19,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash 482166771, now seen corresponding path program 3 times [2024-06-14 12:07:19,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:19,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646949052] [2024-06-14 12:07:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:20,509 INFO 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 12:07:20,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646949052] [2024-06-14 12:07:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646949052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:20,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:20,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:20,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441692103] [2024-06-14 12:07:20,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:20,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:20,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:20,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:20,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 486 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:20,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:21,023 INFO L124 PetriNetUnfolderBase]: 1687/2625 cut-off events. [2024-06-14 12:07:21,023 INFO L125 PetriNetUnfolderBase]: For 20168/20203 co-relation queries the response was YES. [2024-06-14 12:07:21,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 2625 events. 1687/2625 cut-off events. For 20168/20203 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12998 event pairs, 521 based on Foata normal form. 19/2637 useless extension candidates. Maximal degree in co-relation 11954. Up to 2208 conditions per place. [2024-06-14 12:07:21,038 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2024-06-14 12:07:21,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 942 flow [2024-06-14 12:07:21,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:07:21,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-14 12:07:21,039 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 486 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:07:21,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 942 flow [2024-06-14 12:07:21,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 896 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:21,049 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 638 flow [2024-06-14 12:07:21,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-14 12:07:21,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-14 12:07:21,049 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 638 flow [2024-06-14 12:07:21,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:21,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:21,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:21,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:07:21,050 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 12:07:21,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:21,050 INFO L85 PathProgramCache]: Analyzing trace with hash 482413035, now seen corresponding path program 1 times [2024-06-14 12:07:21,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:21,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298054950] [2024-06-14 12:07:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:21,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:22,057 INFO 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 12:07:22,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:22,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298054950] [2024-06-14 12:07:22,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298054950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:22,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:22,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718262940] [2024-06-14 12:07:22,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:22,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:22,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:22,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:22,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:22,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 638 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:22,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:22,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:22,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:22,571 INFO L124 PetriNetUnfolderBase]: 1573/2546 cut-off events. [2024-06-14 12:07:22,572 INFO L125 PetriNetUnfolderBase]: For 20164/20164 co-relation queries the response was YES. [2024-06-14 12:07:22,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11826 conditions, 2546 events. 1573/2546 cut-off events. For 20164/20164 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12779 event pairs, 480 based on Foata normal form. 4/2532 useless extension candidates. Maximal degree in co-relation 11794. Up to 2302 conditions per place. [2024-06-14 12:07:22,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-14 12:07:22,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 932 flow [2024-06-14 12:07:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:07:22,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-14 12:07:22,586 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 638 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:07:22,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 932 flow [2024-06-14 12:07:22,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 828 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:22,598 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 609 flow [2024-06-14 12:07:22,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=609, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-14 12:07:22,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-14 12:07:22,598 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 609 flow [2024-06-14 12:07:22,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:22,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:22,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:22,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:07:22,599 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 12:07:22,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -762430686, now seen corresponding path program 1 times [2024-06-14 12:07:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:22,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226084156] [2024-06-14 12:07:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:22,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:23,168 INFO 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 12:07:23,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:23,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226084156] [2024-06-14 12:07:23,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226084156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:23,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:23,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:07:23,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16448175] [2024-06-14 12:07:23,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:23,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:07:23,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:07:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:07:23,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:23,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 609 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:23,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:23,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:23,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:23,600 INFO L124 PetriNetUnfolderBase]: 1822/2809 cut-off events. [2024-06-14 12:07:23,600 INFO L125 PetriNetUnfolderBase]: For 23970/23970 co-relation queries the response was YES. [2024-06-14 12:07:23,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13015 conditions, 2809 events. 1822/2809 cut-off events. For 23970/23970 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13367 event pairs, 593 based on Foata normal form. 1/2807 useless extension candidates. Maximal degree in co-relation 12982. Up to 2700 conditions per place. [2024-06-14 12:07:23,616 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 81 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2024-06-14 12:07:23,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 93 transitions, 829 flow [2024-06-14 12:07:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:07:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:07:23,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-14 12:07:23,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-14 12:07:23,617 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 609 flow. Second operand 5 states and 83 transitions. [2024-06-14 12:07:23,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 93 transitions, 829 flow [2024-06-14 12:07:23,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 774 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:23,630 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 604 flow [2024-06-14 12:07:23,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=604, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-06-14 12:07:23,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-14 12:07:23,631 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 604 flow [2024-06-14 12:07:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:23,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:23,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:23,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:07:23,632 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 12:07:23,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 862350538, now seen corresponding path program 1 times [2024-06-14 12:07:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5403554] [2024-06-14 12:07:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:24,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:24,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5403554] [2024-06-14 12:07:24,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5403554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:24,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:24,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:24,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3269467] [2024-06-14 12:07:24,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:24,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:24,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:25,265 INFO L124 PetriNetUnfolderBase]: 1761/2722 cut-off events. [2024-06-14 12:07:25,266 INFO L125 PetriNetUnfolderBase]: For 31240/31266 co-relation queries the response was YES. [2024-06-14 12:07:25,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13814 conditions, 2722 events. 1761/2722 cut-off events. For 31240/31266 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13472 event pairs, 552 based on Foata normal form. 7/2720 useless extension candidates. Maximal degree in co-relation 13780. Up to 2503 conditions per place. [2024-06-14 12:07:25,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-06-14 12:07:25,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 932 flow [2024-06-14 12:07:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:07:25,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-14 12:07:25,285 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 604 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:07:25,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 932 flow [2024-06-14 12:07:25,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 904 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:25,297 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 678 flow [2024-06-14 12:07:25,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=678, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-14 12:07:25,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:07:25,298 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 678 flow [2024-06-14 12:07:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:25,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:25,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:25,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:07:25,300 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 12:07:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 866165770, now seen corresponding path program 1 times [2024-06-14 12:07:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:25,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982847488] [2024-06-14 12:07:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:25,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:26,428 INFO 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 12:07:26,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:26,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982847488] [2024-06-14 12:07:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982847488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:26,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104460061] [2024-06-14 12:07:26,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:26,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:26,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:26,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:26,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 678 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:26,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:26,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:26,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:27,004 INFO L124 PetriNetUnfolderBase]: 1895/2887 cut-off events. [2024-06-14 12:07:27,005 INFO L125 PetriNetUnfolderBase]: For 34471/34471 co-relation queries the response was YES. [2024-06-14 12:07:27,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14569 conditions, 2887 events. 1895/2887 cut-off events. For 34471/34471 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13688 event pairs, 589 based on Foata normal form. 2/2886 useless extension candidates. Maximal degree in co-relation 14534. Up to 2725 conditions per place. [2024-06-14 12:07:27,020 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2024-06-14 12:07:27,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 119 transitions, 1023 flow [2024-06-14 12:07:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:07:27,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:07:27,022 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 678 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:07:27,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 119 transitions, 1023 flow [2024-06-14 12:07:27,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 965 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:27,039 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 723 flow [2024-06-14 12:07:27,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=723, PETRI_PLACES=86, PETRI_TRANSITIONS=93} [2024-06-14 12:07:27,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-14 12:07:27,040 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 723 flow [2024-06-14 12:07:27,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:27,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:27,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:27,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:07:27,041 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 12:07:27,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash 436463146, now seen corresponding path program 2 times [2024-06-14 12:07:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790648661] [2024-06-14 12:07:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:27,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790648661] [2024-06-14 12:07:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790648661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:28,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066052587] [2024-06-14 12:07:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:28,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:28,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 93 transitions, 723 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:28,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:28,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:28,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:28,709 INFO L124 PetriNetUnfolderBase]: 1917/2921 cut-off events. [2024-06-14 12:07:28,709 INFO L125 PetriNetUnfolderBase]: For 38609/38624 co-relation queries the response was YES. [2024-06-14 12:07:28,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15088 conditions, 2921 events. 1917/2921 cut-off events. For 38609/38624 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13849 event pairs, 586 based on Foata normal form. 12/2928 useless extension candidates. Maximal degree in co-relation 15051. Up to 2712 conditions per place. [2024-06-14 12:07:28,725 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-14 12:07:28,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 1084 flow [2024-06-14 12:07:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:07:28,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:07:28,727 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 723 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:07:28,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 1084 flow [2024-06-14 12:07:28,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 1026 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:28,744 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 808 flow [2024-06-14 12:07:28,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=808, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-14 12:07:28,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-14 12:07:28,745 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 808 flow [2024-06-14 12:07:28,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:28,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:28,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:28,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:07:28,746 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 12:07:28,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:28,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2069627244, now seen corresponding path program 3 times [2024-06-14 12:07:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:28,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914443024] [2024-06-14 12:07:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:28,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:29,671 INFO 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 12:07:29,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914443024] [2024-06-14 12:07:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914443024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:29,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663995814] [2024-06-14 12:07:29,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:29,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:29,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:29,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:29,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 808 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:29,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:29,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:29,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:30,287 INFO L124 PetriNetUnfolderBase]: 1972/3005 cut-off events. [2024-06-14 12:07:30,288 INFO L125 PetriNetUnfolderBase]: For 44026/44032 co-relation queries the response was YES. [2024-06-14 12:07:30,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15974 conditions, 3005 events. 1972/3005 cut-off events. For 44026/44032 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14280 event pairs, 533 based on Foata normal form. 10/3006 useless extension candidates. Maximal degree in co-relation 15935. Up to 2570 conditions per place. [2024-06-14 12:07:30,308 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 92 selfloop transitions, 56 changer transitions 0/153 dead transitions. [2024-06-14 12:07:30,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1387 flow [2024-06-14 12:07:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:07:30,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:07:30,310 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 808 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:07:30,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1387 flow [2024-06-14 12:07:30,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1303 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:30,353 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1069 flow [2024-06-14 12:07:30,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1069, PETRI_PLACES=96, PETRI_TRANSITIONS=123} [2024-06-14 12:07:30,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-14 12:07:30,354 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1069 flow [2024-06-14 12:07:30,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:30,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:30,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:30,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:07:30,354 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 12:07:30,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:30,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2069894154, now seen corresponding path program 4 times [2024-06-14 12:07:30,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:30,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472736195] [2024-06-14 12:07:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:30,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472736195] [2024-06-14 12:07:31,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472736195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:31,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:31,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:31,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141098707] [2024-06-14 12:07:31,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:31,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:31,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:31,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:31,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 123 transitions, 1069 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:31,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:31,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:31,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:31,993 INFO L124 PetriNetUnfolderBase]: 1961/2984 cut-off events. [2024-06-14 12:07:31,993 INFO L125 PetriNetUnfolderBase]: For 47975/47990 co-relation queries the response was YES. [2024-06-14 12:07:32,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16543 conditions, 2984 events. 1961/2984 cut-off events. For 47975/47990 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14172 event pairs, 564 based on Foata normal form. 12/2991 useless extension candidates. Maximal degree in co-relation 16501. Up to 2739 conditions per place. [2024-06-14 12:07:32,013 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 42 changer transitions 0/155 dead transitions. [2024-06-14 12:07:32,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1527 flow [2024-06-14 12:07:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:32,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:07:32,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:07:32,019 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1069 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:07:32,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1527 flow [2024-06-14 12:07:32,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 155 transitions, 1461 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-14 12:07:32,056 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1194 flow [2024-06-14 12:07:32,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1194, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-14 12:07:32,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 12:07:32,056 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1194 flow [2024-06-14 12:07:32,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:07:32,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:32,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:07:32,057 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 12:07:32,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2134453610, now seen corresponding path program 1 times [2024-06-14 12:07:32,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:32,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113979244] [2024-06-14 12:07:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:32,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:32,730 INFO 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 12:07:32,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:32,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113979244] [2024-06-14 12:07:32,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113979244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:32,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:32,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:32,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031638420] [2024-06-14 12:07:32,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:32,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:32,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:32,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:32,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:32,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:32,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:32,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:32,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:32,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:33,286 INFO L124 PetriNetUnfolderBase]: 1861/2862 cut-off events. [2024-06-14 12:07:33,286 INFO L125 PetriNetUnfolderBase]: For 43188/43188 co-relation queries the response was YES. [2024-06-14 12:07:33,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15503 conditions, 2862 events. 1861/2862 cut-off events. For 43188/43188 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13572 event pairs, 512 based on Foata normal form. 2/2861 useless extension candidates. Maximal degree in co-relation 15458. Up to 2750 conditions per place. [2024-06-14 12:07:33,303 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 126 selfloop transitions, 11 changer transitions 0/141 dead transitions. [2024-06-14 12:07:33,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 141 transitions, 1521 flow [2024-06-14 12:07:33,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:07:33,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:07:33,304 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1194 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:07:33,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 141 transitions, 1521 flow [2024-06-14 12:07:33,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1427 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:33,334 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1160 flow [2024-06-14 12:07:33,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1160, PETRI_PLACES=105, PETRI_TRANSITIONS=131} [2024-06-14 12:07:33,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-14 12:07:33,335 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1160 flow [2024-06-14 12:07:33,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:33,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:33,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:33,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:07:33,336 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 12:07:33,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:33,336 INFO L85 PathProgramCache]: Analyzing trace with hash -199728068, now seen corresponding path program 1 times [2024-06-14 12:07:33,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:33,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75481408] [2024-06-14 12:07:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:33,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:34,312 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 12:07:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:34,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75481408] [2024-06-14 12:07:34,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75481408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:34,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:34,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122844007] [2024-06-14 12:07:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:34,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:34,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:34,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 131 transitions, 1160 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:34,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:34,976 INFO L124 PetriNetUnfolderBase]: 1860/2888 cut-off events. [2024-06-14 12:07:34,976 INFO L125 PetriNetUnfolderBase]: For 55390/55400 co-relation queries the response was YES. [2024-06-14 12:07:34,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16816 conditions, 2888 events. 1860/2888 cut-off events. For 55390/55400 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14317 event pairs, 362 based on Foata normal form. 4/2875 useless extension candidates. Maximal degree in co-relation 16770. Up to 2612 conditions per place. [2024-06-14 12:07:34,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 18 changer transitions 0/163 dead transitions. [2024-06-14 12:07:34,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 163 transitions, 1588 flow [2024-06-14 12:07:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:07:34,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 12:07:34,996 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1160 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:07:34,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 163 transitions, 1588 flow [2024-06-14 12:07:35,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 163 transitions, 1550 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:35,027 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1209 flow [2024-06-14 12:07:35,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1209, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-14 12:07:35,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 12:07:35,027 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1209 flow [2024-06-14 12:07:35,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:35,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:35,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:35,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:07:35,028 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 12:07:35,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash -273461382, now seen corresponding path program 2 times [2024-06-14 12:07:35,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:35,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991946402] [2024-06-14 12:07:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991946402] [2024-06-14 12:07:35,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991946402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:35,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:35,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:35,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837656738] [2024-06-14 12:07:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:35,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:35,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:35,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:35,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:36,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:36,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1209 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:36,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:36,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:36,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:36,666 INFO L124 PetriNetUnfolderBase]: 1891/2937 cut-off events. [2024-06-14 12:07:36,666 INFO L125 PetriNetUnfolderBase]: For 62863/62868 co-relation queries the response was YES. [2024-06-14 12:07:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17553 conditions, 2937 events. 1891/2937 cut-off events. For 62863/62868 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14623 event pairs, 462 based on Foata normal form. 8/2932 useless extension candidates. Maximal degree in co-relation 17506. Up to 2638 conditions per place. [2024-06-14 12:07:36,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 129 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-06-14 12:07:36,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 165 transitions, 1647 flow [2024-06-14 12:07:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:07:36,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:07:36,687 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1209 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:07:36,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 165 transitions, 1647 flow [2024-06-14 12:07:36,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 1578 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:36,714 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1250 flow [2024-06-14 12:07:36,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1250, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-14 12:07:36,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-14 12:07:36,715 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1250 flow [2024-06-14 12:07:36,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:36,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:36,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:07:36,716 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:36,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:36,716 INFO L85 PathProgramCache]: Analyzing trace with hash -287966562, now seen corresponding path program 1 times [2024-06-14 12:07:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:36,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481428120] [2024-06-14 12:07:36,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:36,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:37,612 INFO 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 12:07:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481428120] [2024-06-14 12:07:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481428120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:37,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987057925] [2024-06-14 12:07:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:37,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:37,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:37,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1250 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:37,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:37,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:37,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:38,347 INFO L124 PetriNetUnfolderBase]: 2020/3074 cut-off events. [2024-06-14 12:07:38,348 INFO L125 PetriNetUnfolderBase]: For 67653/67653 co-relation queries the response was YES. [2024-06-14 12:07:38,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18191 conditions, 3074 events. 2020/3074 cut-off events. For 67653/67653 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14698 event pairs, 495 based on Foata normal form. 4/3075 useless extension candidates. Maximal degree in co-relation 18143. Up to 2739 conditions per place. [2024-06-14 12:07:38,366 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 39 changer transitions 0/164 dead transitions. [2024-06-14 12:07:38,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 164 transitions, 1658 flow [2024-06-14 12:07:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:07:38,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:07:38,367 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1250 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:07:38,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 164 transitions, 1658 flow [2024-06-14 12:07:38,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 164 transitions, 1554 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:38,406 INFO L231 Difference]: Finished difference. Result has 114 places, 136 transitions, 1263 flow [2024-06-14 12:07:38,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1263, PETRI_PLACES=114, PETRI_TRANSITIONS=136} [2024-06-14 12:07:38,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 12:07:38,407 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 136 transitions, 1263 flow [2024-06-14 12:07:38,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:38,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:38,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:38,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:07:38,407 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:38,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1081152242, now seen corresponding path program 3 times [2024-06-14 12:07:38,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:38,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760173441] [2024-06-14 12:07:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:38,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:39,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760173441] [2024-06-14 12:07:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760173441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:39,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064443693] [2024-06-14 12:07:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:39,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:39,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:39,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:39,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:39,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 136 transitions, 1263 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:39,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:39,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:39,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:39,959 INFO L124 PetriNetUnfolderBase]: 1915/2979 cut-off events. [2024-06-14 12:07:39,959 INFO L125 PetriNetUnfolderBase]: For 75066/75071 co-relation queries the response was YES. [2024-06-14 12:07:39,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18316 conditions, 2979 events. 1915/2979 cut-off events. For 75066/75071 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14854 event pairs, 458 based on Foata normal form. 8/2977 useless extension candidates. Maximal degree in co-relation 18266. Up to 2651 conditions per place. [2024-06-14 12:07:39,979 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 35 changer transitions 0/166 dead transitions. [2024-06-14 12:07:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 166 transitions, 1698 flow [2024-06-14 12:07:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:07:39,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:07:39,981 INFO L175 Difference]: Start difference. First operand has 114 places, 136 transitions, 1263 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:07:39,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 166 transitions, 1698 flow [2024-06-14 12:07:40,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1613 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:40,023 INFO L231 Difference]: Finished difference. Result has 117 places, 138 transitions, 1308 flow [2024-06-14 12:07:40,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1308, PETRI_PLACES=117, PETRI_TRANSITIONS=138} [2024-06-14 12:07:40,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 12:07:40,023 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 1308 flow [2024-06-14 12:07:40,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:40,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:40,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:07:40,024 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:40,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1081336940, now seen corresponding path program 1 times [2024-06-14 12:07:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239557830] [2024-06-14 12:07:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:41,042 INFO 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 12:07:41,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239557830] [2024-06-14 12:07:41,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239557830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:41,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:41,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:41,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483164342] [2024-06-14 12:07:41,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:41,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:41,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:41,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:41,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 138 transitions, 1308 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:41,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:41,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:41,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:41,889 INFO L124 PetriNetUnfolderBase]: 2164/3298 cut-off events. [2024-06-14 12:07:41,889 INFO L125 PetriNetUnfolderBase]: For 82884/82884 co-relation queries the response was YES. [2024-06-14 12:07:41,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19757 conditions, 3298 events. 2164/3298 cut-off events. For 82884/82884 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16014 event pairs, 505 based on Foata normal form. 24/3310 useless extension candidates. Maximal degree in co-relation 19706. Up to 2831 conditions per place. [2024-06-14 12:07:41,910 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 131 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2024-06-14 12:07:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1805 flow [2024-06-14 12:07:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:07:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:07:41,912 INFO L175 Difference]: Start difference. First operand has 117 places, 138 transitions, 1308 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:07:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1805 flow [2024-06-14 12:07:41,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 1702 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:41,960 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1342 flow [2024-06-14 12:07:41,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1342, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-14 12:07:41,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-14 12:07:41,961 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1342 flow [2024-06-14 12:07:41,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:41,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:41,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:41,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:07:41,961 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 12:07:41,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1732111873, now seen corresponding path program 1 times [2024-06-14 12:07:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403706370] [2024-06-14 12:07:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:42,550 INFO 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 12:07:42,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:42,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403706370] [2024-06-14 12:07:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403706370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:42,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:42,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512380762] [2024-06-14 12:07:42,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:42,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:42,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:42,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:42,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:42,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:07:42,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 12:07:42,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:42,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:07:42,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:43,201 INFO L124 PetriNetUnfolderBase]: 2299/3435 cut-off events. [2024-06-14 12:07:43,201 INFO L125 PetriNetUnfolderBase]: For 81903/81903 co-relation queries the response was YES. [2024-06-14 12:07:43,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20715 conditions, 3435 events. 2299/3435 cut-off events. For 81903/81903 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16166 event pairs, 560 based on Foata normal form. 1/3433 useless extension candidates. Maximal degree in co-relation 20663. Up to 3397 conditions per place. [2024-06-14 12:07:43,223 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 143 selfloop transitions, 16 changer transitions 0/162 dead transitions. [2024-06-14 12:07:43,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 162 transitions, 1816 flow [2024-06-14 12:07:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 12:07:43,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:07:43,225 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1342 flow. Second operand 6 states and 99 transitions. [2024-06-14 12:07:43,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 162 transitions, 1816 flow [2024-06-14 12:07:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 162 transitions, 1709 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:43,276 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1343 flow [2024-06-14 12:07:43,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1343, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-06-14 12:07:43,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 12:07:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1343 flow [2024-06-14 12:07:43,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 12:07:43,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:43,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:43,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:07:43,277 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 12:07:43,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:43,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1253232184, now seen corresponding path program 2 times [2024-06-14 12:07:43,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:43,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352490864] [2024-06-14 12:07:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:43,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:44,325 INFO 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 12:07:44,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:44,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352490864] [2024-06-14 12:07:44,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352490864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:44,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:44,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968656358] [2024-06-14 12:07:44,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:44,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:44,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:44,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 1343 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:44,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:44,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:44,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:45,062 INFO L124 PetriNetUnfolderBase]: 2264/3464 cut-off events. [2024-06-14 12:07:45,063 INFO L125 PetriNetUnfolderBase]: For 96137/96155 co-relation queries the response was YES. [2024-06-14 12:07:45,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21061 conditions, 3464 events. 2264/3464 cut-off events. For 96137/96155 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17007 event pairs, 539 based on Foata normal form. 31/3488 useless extension candidates. Maximal degree in co-relation 21008. Up to 2891 conditions per place. [2024-06-14 12:07:45,088 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 60 changer transitions 0/183 dead transitions. [2024-06-14 12:07:45,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 183 transitions, 1847 flow [2024-06-14 12:07:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:07:45,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-14 12:07:45,096 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 1343 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:07:45,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 183 transitions, 1847 flow [2024-06-14 12:07:45,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 183 transitions, 1809 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:45,144 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1486 flow [2024-06-14 12:07:45,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1486, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-14 12:07:45,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-14 12:07:45,145 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1486 flow [2024-06-14 12:07:45,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:45,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:45,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:07:45,145 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 12:07:45,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash -257492150, now seen corresponding path program 3 times [2024-06-14 12:07:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:45,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355051838] [2024-06-14 12:07:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:45,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:46,104 INFO 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 12:07:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355051838] [2024-06-14 12:07:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355051838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:46,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426854770] [2024-06-14 12:07:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:46,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:46,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1486 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:46,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:46,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:46,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:46,993 INFO L124 PetriNetUnfolderBase]: 2392/3672 cut-off events. [2024-06-14 12:07:46,993 INFO L125 PetriNetUnfolderBase]: For 107719/107737 co-relation queries the response was YES. [2024-06-14 12:07:47,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23410 conditions, 3672 events. 2392/3672 cut-off events. For 107719/107737 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18376 event pairs, 489 based on Foata normal form. 11/3676 useless extension candidates. Maximal degree in co-relation 23355. Up to 2616 conditions per place. [2024-06-14 12:07:47,023 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 84 changer transitions 0/191 dead transitions. [2024-06-14 12:07:47,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2256 flow [2024-06-14 12:07:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:47,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:07:47,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:07:47,024 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1486 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:07:47,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2256 flow [2024-06-14 12:07:47,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 191 transitions, 2105 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:47,157 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 1618 flow [2024-06-14 12:07:47,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1618, PETRI_PLACES=129, PETRI_TRANSITIONS=152} [2024-06-14 12:07:47,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 12:07:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 1618 flow [2024-06-14 12:07:47,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:47,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:47,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:47,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:07:47,158 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 12:07:47,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash -257788820, now seen corresponding path program 4 times [2024-06-14 12:07:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:47,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603171157] [2024-06-14 12:07:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:47,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:48,041 INFO 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 12:07:48,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603171157] [2024-06-14 12:07:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603171157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:48,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:48,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:48,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138754648] [2024-06-14 12:07:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:48,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:48,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:48,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 152 transitions, 1618 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:48,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:48,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:48,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:48,811 INFO L124 PetriNetUnfolderBase]: 2409/3699 cut-off events. [2024-06-14 12:07:48,811 INFO L125 PetriNetUnfolderBase]: For 115000/115018 co-relation queries the response was YES. [2024-06-14 12:07:48,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23938 conditions, 3699 events. 2409/3699 cut-off events. For 115000/115018 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18608 event pairs, 560 based on Foata normal form. 11/3703 useless extension candidates. Maximal degree in co-relation 23882. Up to 3143 conditions per place. [2024-06-14 12:07:48,840 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 102 selfloop transitions, 77 changer transitions 0/186 dead transitions. [2024-06-14 12:07:48,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 186 transitions, 2214 flow [2024-06-14 12:07:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:07:48,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-14 12:07:48,842 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 1618 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:07:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 186 transitions, 2214 flow [2024-06-14 12:07:48,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 2041 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:48,919 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1666 flow [2024-06-14 12:07:48,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1666, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-06-14 12:07:48,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-14 12:07:48,920 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1666 flow [2024-06-14 12:07:48,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:48,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:48,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:48,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:07:48,920 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:48,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash -493970938, now seen corresponding path program 2 times [2024-06-14 12:07:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:48,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32061727] [2024-06-14 12:07:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:48,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:49,738 INFO 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 12:07:49,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:49,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32061727] [2024-06-14 12:07:49,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32061727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:49,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:49,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287973203] [2024-06-14 12:07:49,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:49,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:49,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1666 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:49,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:49,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:49,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:50,433 INFO L124 PetriNetUnfolderBase]: 2399/3685 cut-off events. [2024-06-14 12:07:50,433 INFO L125 PetriNetUnfolderBase]: For 118355/118373 co-relation queries the response was YES. [2024-06-14 12:07:50,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23773 conditions, 3685 events. 2399/3685 cut-off events. For 118355/118373 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18491 event pairs, 572 based on Foata normal form. 11/3689 useless extension candidates. Maximal degree in co-relation 23717. Up to 3250 conditions per place. [2024-06-14 12:07:50,461 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 56 changer transitions 0/180 dead transitions. [2024-06-14 12:07:50,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 180 transitions, 2084 flow [2024-06-14 12:07:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:07:50,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 12:07:50,463 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1666 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:07:50,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 180 transitions, 2084 flow [2024-06-14 12:07:50,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 180 transitions, 1863 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:50,557 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 1569 flow [2024-06-14 12:07:50,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1569, PETRI_PLACES=134, PETRI_TRANSITIONS=154} [2024-06-14 12:07:50,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 12:07:50,558 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 1569 flow [2024-06-14 12:07:50,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:50,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:50,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:50,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:07:50,558 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 12:07:50,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:50,559 INFO L85 PathProgramCache]: Analyzing trace with hash -493964180, now seen corresponding path program 5 times [2024-06-14 12:07:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869361143] [2024-06-14 12:07:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:51,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869361143] [2024-06-14 12:07:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869361143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:51,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250538910] [2024-06-14 12:07:51,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:51,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:51,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:51,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:51,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 154 transitions, 1569 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:51,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:51,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:51,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:52,298 INFO L124 PetriNetUnfolderBase]: 2391/3671 cut-off events. [2024-06-14 12:07:52,298 INFO L125 PetriNetUnfolderBase]: For 122791/122809 co-relation queries the response was YES. [2024-06-14 12:07:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23576 conditions, 3671 events. 2391/3671 cut-off events. For 122791/122809 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18444 event pairs, 595 based on Foata normal form. 16/3682 useless extension candidates. Maximal degree in co-relation 23519. Up to 3442 conditions per place. [2024-06-14 12:07:52,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2024-06-14 12:07:52,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 183 transitions, 2032 flow [2024-06-14 12:07:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:07:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:07:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:07:52,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:07:52,325 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 1569 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:07:52,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 183 transitions, 2032 flow [2024-06-14 12:07:52,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 183 transitions, 1833 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 12:07:52,391 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1479 flow [2024-06-14 12:07:52,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1479, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-14 12:07:52,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 12:07:52,392 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1479 flow [2024-06-14 12:07:52,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:52,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:52,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:52,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:07:52,393 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 12:07:52,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:52,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1688246886, now seen corresponding path program 4 times [2024-06-14 12:07:52,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:52,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89860112] [2024-06-14 12:07:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:52,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:53,499 INFO 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 12:07:53,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:53,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89860112] [2024-06-14 12:07:53,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89860112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:53,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:53,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:07:53,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378149232] [2024-06-14 12:07:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:53,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:07:53,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:07:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:07:53,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:07:53,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:53,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:53,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:07:53,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:54,291 INFO L124 PetriNetUnfolderBase]: 2232/3491 cut-off events. [2024-06-14 12:07:54,291 INFO L125 PetriNetUnfolderBase]: For 123138/123171 co-relation queries the response was YES. [2024-06-14 12:07:54,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22529 conditions, 3491 events. 2232/3491 cut-off events. For 123138/123171 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18108 event pairs, 524 based on Foata normal form. 15/3478 useless extension candidates. Maximal degree in co-relation 22473. Up to 3084 conditions per place. [2024-06-14 12:07:54,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-14 12:07:54,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 182 transitions, 1941 flow [2024-06-14 12:07:54,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:07:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:07:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:07:54,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-14 12:07:54,317 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1479 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:07:54,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 182 transitions, 1941 flow [2024-06-14 12:07:54,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 1836 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:07:54,387 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1551 flow [2024-06-14 12:07:54,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1551, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-06-14 12:07:54,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-14 12:07:54,388 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1551 flow [2024-06-14 12:07:54,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 12:07:54,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:54,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:54,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:07:54,389 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:54,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:54,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1743539713, now seen corresponding path program 2 times [2024-06-14 12:07:54,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:54,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824449704] [2024-06-14 12:07:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:54,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:55,013 INFO 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 12:07:55,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:55,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824449704] [2024-06-14 12:07:55,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824449704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:55,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:55,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235623703] [2024-06-14 12:07:55,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:55,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:55,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:07:55,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1551 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 12:07:55,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:55,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:07:55,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:55,717 INFO L124 PetriNetUnfolderBase]: 2499/3770 cut-off events. [2024-06-14 12:07:55,717 INFO L125 PetriNetUnfolderBase]: For 126392/126410 co-relation queries the response was YES. [2024-06-14 12:07:55,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23816 conditions, 3770 events. 2499/3770 cut-off events. For 126392/126410 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18381 event pairs, 635 based on Foata normal form. 13/3778 useless extension candidates. Maximal degree in co-relation 23759. Up to 3731 conditions per place. [2024-06-14 12:07:55,749 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 147 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-14 12:07:55,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 166 transitions, 1902 flow [2024-06-14 12:07:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-14 12:07:55,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 12:07:55,751 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1551 flow. Second operand 6 states and 92 transitions. [2024-06-14 12:07:55,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 166 transitions, 1902 flow [2024-06-14 12:07:55,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1740 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:55,820 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1427 flow [2024-06-14 12:07:55,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1427, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-14 12:07:55,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 12:07:55,823 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1427 flow [2024-06-14 12:07:55,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 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 12:07:55,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:55,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:55,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:07:55,823 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 12:07:55,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1072226979, now seen corresponding path program 1 times [2024-06-14 12:07:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:55,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259020804] [2024-06-14 12:07:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:55,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:56,607 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 12:07:56,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:56,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259020804] [2024-06-14 12:07:56,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259020804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:56,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:56,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:56,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088416402] [2024-06-14 12:07:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:56,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1427 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:56,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:56,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:56,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:57,167 INFO L124 PetriNetUnfolderBase]: 2255/3497 cut-off events. [2024-06-14 12:07:57,167 INFO L125 PetriNetUnfolderBase]: For 111997/111997 co-relation queries the response was YES. [2024-06-14 12:07:57,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21316 conditions, 3497 events. 2255/3497 cut-off events. For 111997/111997 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17630 event pairs, 545 based on Foata normal form. 1/3495 useless extension candidates. Maximal degree in co-relation 21258. Up to 3387 conditions per place. [2024-06-14 12:07:57,189 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 156 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-14 12:07:57,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 176 transitions, 1918 flow [2024-06-14 12:07:57,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:07:57,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-14 12:07:57,190 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1427 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:07:57,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 176 transitions, 1918 flow [2024-06-14 12:07:57,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 176 transitions, 1878 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:57,254 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1483 flow [2024-06-14 12:07:57,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1483, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2024-06-14 12:07:57,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-14 12:07:57,254 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1483 flow [2024-06-14 12:07:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:57,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:57,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:57,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:07:57,255 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 12:07:57,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1606749021, now seen corresponding path program 2 times [2024-06-14 12:07:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268360509] [2024-06-14 12:07:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:57,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:57,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268360509] [2024-06-14 12:07:57,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268360509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:57,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:57,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:57,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032348837] [2024-06-14 12:07:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:57,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:57,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:57,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:57,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:07:57,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1483 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:57,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:57,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:07:57,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:58,548 INFO L124 PetriNetUnfolderBase]: 2252/3493 cut-off events. [2024-06-14 12:07:58,548 INFO L125 PetriNetUnfolderBase]: For 118210/118210 co-relation queries the response was YES. [2024-06-14 12:07:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21765 conditions, 3493 events. 2252/3493 cut-off events. For 118210/118210 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17615 event pairs, 544 based on Foata normal form. 1/3491 useless extension candidates. Maximal degree in co-relation 21706. Up to 3396 conditions per place. [2024-06-14 12:07:58,569 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 157 selfloop transitions, 11 changer transitions 0/172 dead transitions. [2024-06-14 12:07:58,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 172 transitions, 1844 flow [2024-06-14 12:07:58,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-14 12:07:58,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-14 12:07:58,571 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1483 flow. Second operand 6 states and 95 transitions. [2024-06-14 12:07:58,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 172 transitions, 1844 flow [2024-06-14 12:07:58,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 172 transitions, 1800 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:58,631 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1467 flow [2024-06-14 12:07:58,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1467, PETRI_PLACES=141, PETRI_TRANSITIONS=163} [2024-06-14 12:07:58,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 12:07:58,632 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1467 flow [2024-06-14 12:07:58,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:58,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:58,632 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 12:07:58,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:07:58,633 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:07:58,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2139116287, now seen corresponding path program 1 times [2024-06-14 12:07:58,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:58,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037226646] [2024-06-14 12:07:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:58,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:59,332 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 12:07:59,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037226646] [2024-06-14 12:07:59,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037226646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:59,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:59,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156077096] [2024-06-14 12:07:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:59,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:07:59,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 163 transitions, 1467 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:59,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:59,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:07:59,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:00,123 INFO L124 PetriNetUnfolderBase]: 2511/3785 cut-off events. [2024-06-14 12:08:00,124 INFO L125 PetriNetUnfolderBase]: For 144746/144746 co-relation queries the response was YES. [2024-06-14 12:08:00,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24489 conditions, 3785 events. 2511/3785 cut-off events. For 144746/144746 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18421 event pairs, 627 based on Foata normal form. 2/3784 useless extension candidates. Maximal degree in co-relation 24428. Up to 3699 conditions per place. [2024-06-14 12:08:00,156 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 163 selfloop transitions, 27 changer transitions 0/193 dead transitions. [2024-06-14 12:08:00,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 193 transitions, 2045 flow [2024-06-14 12:08:00,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:00,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:08:00,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:08:00,158 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1467 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:08:00,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 193 transitions, 2045 flow [2024-06-14 12:08:00,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 193 transitions, 2015 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:00,233 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1568 flow [2024-06-14 12:08:00,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1568, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2024-06-14 12:08:00,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-14 12:08:00,234 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1568 flow [2024-06-14 12:08:00,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:00,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:00,234 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 12:08:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:08:00,235 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 12:08:00,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash -838299070, now seen corresponding path program 1 times [2024-06-14 12:08:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:00,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344433215] [2024-06-14 12:08:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:00,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:01,137 INFO 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 12:08:01,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:01,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344433215] [2024-06-14 12:08:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344433215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:01,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544547928] [2024-06-14 12:08:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:01,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:01,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:01,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:01,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:01,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:01,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1568 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:01,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:01,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:01,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:01,892 INFO L124 PetriNetUnfolderBase]: 2520/3864 cut-off events. [2024-06-14 12:08:01,893 INFO L125 PetriNetUnfolderBase]: For 164905/164905 co-relation queries the response was YES. [2024-06-14 12:08:01,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25533 conditions, 3864 events. 2520/3864 cut-off events. For 164905/164905 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19520 event pairs, 591 based on Foata normal form. 20/3881 useless extension candidates. Maximal degree in co-relation 25471. Up to 3346 conditions per place. [2024-06-14 12:08:01,923 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 156 selfloop transitions, 45 changer transitions 0/212 dead transitions. [2024-06-14 12:08:01,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 212 transitions, 2158 flow [2024-06-14 12:08:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:08:01,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:08:01,925 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1568 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:08:01,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 212 transitions, 2158 flow [2024-06-14 12:08:02,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 212 transitions, 2108 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:02,016 INFO L231 Difference]: Finished difference. Result has 150 places, 175 transitions, 1709 flow [2024-06-14 12:08:02,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1709, PETRI_PLACES=150, PETRI_TRANSITIONS=175} [2024-06-14 12:08:02,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 12:08:02,017 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 175 transitions, 1709 flow [2024-06-14 12:08:02,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:02,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:02,017 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 12:08:02,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:08:02,017 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 12:08:02,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1035224830, now seen corresponding path program 2 times [2024-06-14 12:08:02,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:02,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346148631] [2024-06-14 12:08:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:02,830 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 12:08:02,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346148631] [2024-06-14 12:08:02,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346148631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:02,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:02,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757220769] [2024-06-14 12:08:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:02,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:02,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:02,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:02,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:02,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:02,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 175 transitions, 1709 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:02,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:02,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:02,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:03,714 INFO L124 PetriNetUnfolderBase]: 2684/4130 cut-off events. [2024-06-14 12:08:03,714 INFO L125 PetriNetUnfolderBase]: For 185957/185957 co-relation queries the response was YES. [2024-06-14 12:08:03,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27889 conditions, 4130 events. 2684/4130 cut-off events. For 185957/185957 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21365 event pairs, 624 based on Foata normal form. 16/4130 useless extension candidates. Maximal degree in co-relation 27824. Up to 3232 conditions per place. [2024-06-14 12:08:03,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 47 changer transitions 0/223 dead transitions. [2024-06-14 12:08:03,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 223 transitions, 2486 flow [2024-06-14 12:08:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:08:03,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:08:03,804 INFO L175 Difference]: Start difference. First operand has 150 places, 175 transitions, 1709 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:08:03,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 223 transitions, 2486 flow [2024-06-14 12:08:03,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 223 transitions, 2387 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:03,906 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1822 flow [2024-06-14 12:08:03,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1822, PETRI_PLACES=154, PETRI_TRANSITIONS=179} [2024-06-14 12:08:03,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 12:08:03,906 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1822 flow [2024-06-14 12:08:03,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:03,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:03,907 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 12:08:03,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:08:03,907 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:03,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:03,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1358066477, now seen corresponding path program 2 times [2024-06-14 12:08:03,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:03,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584190066] [2024-06-14 12:08:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:04,551 INFO 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 12:08:04,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:04,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584190066] [2024-06-14 12:08:04,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584190066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:04,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:04,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:04,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718513524] [2024-06-14 12:08:04,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:04,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:04,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:04,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 179 transitions, 1822 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:04,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:04,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:04,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:05,501 INFO L124 PetriNetUnfolderBase]: 2788/4238 cut-off events. [2024-06-14 12:08:05,501 INFO L125 PetriNetUnfolderBase]: For 183642/183642 co-relation queries the response was YES. [2024-06-14 12:08:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28582 conditions, 4238 events. 2788/4238 cut-off events. For 183642/183642 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21516 event pairs, 706 based on Foata normal form. 2/4237 useless extension candidates. Maximal degree in co-relation 28515. Up to 4148 conditions per place. [2024-06-14 12:08:05,535 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 29 changer transitions 0/201 dead transitions. [2024-06-14 12:08:05,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2375 flow [2024-06-14 12:08:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:08:05,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 12:08:05,539 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1822 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:08:05,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2375 flow [2024-06-14 12:08:05,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 201 transitions, 2297 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:05,668 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 1840 flow [2024-06-14 12:08:05,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1840, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-06-14 12:08:05,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-14 12:08:05,669 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 1840 flow [2024-06-14 12:08:05,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:05,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:05,669 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 12:08:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:08:05,670 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:05,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2139105685, now seen corresponding path program 1 times [2024-06-14 12:08:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983732034] [2024-06-14 12:08:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:06,438 INFO 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 12:08:06,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983732034] [2024-06-14 12:08:06,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983732034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:06,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:06,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:06,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396912124] [2024-06-14 12:08:06,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:06,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:06,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:06,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:06,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:06,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 1840 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:06,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:06,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:06,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:07,290 INFO L124 PetriNetUnfolderBase]: 2793/4245 cut-off events. [2024-06-14 12:08:07,290 INFO L125 PetriNetUnfolderBase]: For 188382/188382 co-relation queries the response was YES. [2024-06-14 12:08:07,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28658 conditions, 4245 events. 2793/4245 cut-off events. For 188382/188382 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21563 event pairs, 706 based on Foata normal form. 1/4243 useless extension candidates. Maximal degree in co-relation 28589. Up to 4196 conditions per place. [2024-06-14 12:08:07,330 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 23 changer transitions 0/208 dead transitions. [2024-06-14 12:08:07,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 208 transitions, 2452 flow [2024-06-14 12:08:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:08:07,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:08:07,331 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 1840 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:08:07,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 208 transitions, 2452 flow [2024-06-14 12:08:07,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 208 transitions, 2393 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:07,475 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 1933 flow [2024-06-14 12:08:07,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1933, PETRI_PLACES=160, PETRI_TRANSITIONS=191} [2024-06-14 12:08:07,476 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 12:08:07,476 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1933 flow [2024-06-14 12:08:07,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:07,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:07,477 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 12:08:07,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:08:07,477 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 12:08:07,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash -4017402, now seen corresponding path program 3 times [2024-06-14 12:08:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401656045] [2024-06-14 12:08:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:08,622 INFO 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 12:08:08,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:08,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401656045] [2024-06-14 12:08:08,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401656045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:08,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:08,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:08:08,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463576779] [2024-06-14 12:08:08,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:08,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:08:08,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:08:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:08:08,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:08,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 191 transitions, 1933 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 12:08:08,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:08,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:08,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:09,613 INFO L124 PetriNetUnfolderBase]: 2821/4357 cut-off events. [2024-06-14 12:08:09,614 INFO L125 PetriNetUnfolderBase]: For 213095/213110 co-relation queries the response was YES. [2024-06-14 12:08:09,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29744 conditions, 4357 events. 2821/4357 cut-off events. For 213095/213110 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 22944 event pairs, 666 based on Foata normal form. 26/4376 useless extension candidates. Maximal degree in co-relation 29673. Up to 3763 conditions per place. [2024-06-14 12:08:09,650 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-14 12:08:09,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 239 transitions, 2602 flow [2024-06-14 12:08:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 12:08:09,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-14 12:08:09,651 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 1933 flow. Second operand 10 states and 178 transitions. [2024-06-14 12:08:09,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 239 transitions, 2602 flow [2024-06-14 12:08:09,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 239 transitions, 2566 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:09,806 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 2150 flow [2024-06-14 12:08:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2150, PETRI_PLACES=169, PETRI_TRANSITIONS=200} [2024-06-14 12:08:09,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 12:08:09,807 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 2150 flow [2024-06-14 12:08:09,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 12:08:09,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:09,807 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 12:08:09,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:08:09,807 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:09,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1866771952, now seen corresponding path program 4 times [2024-06-14 12:08:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:09,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948582282] [2024-06-14 12:08:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:10,968 INFO 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 12:08:10,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:10,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948582282] [2024-06-14 12:08:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948582282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:10,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:08:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636623536] [2024-06-14 12:08:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:08:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:08:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:08:11,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:11,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 200 transitions, 2150 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 12:08:11,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:11,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:11,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:11,821 INFO L124 PetriNetUnfolderBase]: 2802/4330 cut-off events. [2024-06-14 12:08:11,822 INFO L125 PetriNetUnfolderBase]: For 213407/213413 co-relation queries the response was YES. [2024-06-14 12:08:11,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29494 conditions, 4330 events. 2802/4330 cut-off events. For 213407/213413 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22791 event pairs, 630 based on Foata normal form. 24/4345 useless extension candidates. Maximal degree in co-relation 29419. Up to 3734 conditions per place. [2024-06-14 12:08:11,862 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 169 selfloop transitions, 64 changer transitions 0/245 dead transitions. [2024-06-14 12:08:11,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 245 transitions, 2778 flow [2024-06-14 12:08:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:11,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:11,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-14 12:08:11,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 12:08:11,864 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 2150 flow. Second operand 11 states and 192 transitions. [2024-06-14 12:08:11,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 245 transitions, 2778 flow [2024-06-14 12:08:12,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 245 transitions, 2610 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:12,038 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 2136 flow [2024-06-14 12:08:12,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1982, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2136, PETRI_PLACES=174, PETRI_TRANSITIONS=202} [2024-06-14 12:08:12,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 12:08:12,039 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 2136 flow [2024-06-14 12:08:12,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 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 12:08:12,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:12,039 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 12:08:12,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:08:12,040 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:12,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1866973762, now seen corresponding path program 5 times [2024-06-14 12:08:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:12,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380302706] [2024-06-14 12:08:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:12,906 INFO 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 12:08:12,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:12,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380302706] [2024-06-14 12:08:12,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380302706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:12,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:12,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343864940] [2024-06-14 12:08:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:12,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:12,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:12,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:12,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 202 transitions, 2136 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:12,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:12,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:12,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:13,803 INFO L124 PetriNetUnfolderBase]: 2899/4485 cut-off events. [2024-06-14 12:08:13,804 INFO L125 PetriNetUnfolderBase]: For 221417/221432 co-relation queries the response was YES. [2024-06-14 12:08:13,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30202 conditions, 4485 events. 2899/4485 cut-off events. For 221417/221432 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23874 event pairs, 653 based on Foata normal form. 26/4504 useless extension candidates. Maximal degree in co-relation 30126. Up to 3693 conditions per place. [2024-06-14 12:08:13,845 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 83 changer transitions 0/241 dead transitions. [2024-06-14 12:08:13,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 2761 flow [2024-06-14 12:08:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:08:13,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:08:13,847 INFO L175 Difference]: Start difference. First operand has 174 places, 202 transitions, 2136 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:08:13,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 2761 flow [2024-06-14 12:08:14,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 241 transitions, 2591 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 12:08:14,022 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 2205 flow [2024-06-14 12:08:14,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2205, PETRI_PLACES=172, PETRI_TRANSITIONS=206} [2024-06-14 12:08:14,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-14 12:08:14,023 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 2205 flow [2024-06-14 12:08:14,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:14,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:14,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:08:14,023 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1866981202, now seen corresponding path program 6 times [2024-06-14 12:08:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124492679] [2024-06-14 12:08:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:14,933 INFO 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 12:08:14,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:14,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124492679] [2024-06-14 12:08:14,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124492679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:14,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:14,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025066333] [2024-06-14 12:08:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:15,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:15,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 206 transitions, 2205 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:15,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:15,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:15,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:15,854 INFO L124 PetriNetUnfolderBase]: 3018/4686 cut-off events. [2024-06-14 12:08:15,854 INFO L125 PetriNetUnfolderBase]: For 242197/242212 co-relation queries the response was YES. [2024-06-14 12:08:15,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32032 conditions, 4686 events. 3018/4686 cut-off events. For 242197/242212 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25219 event pairs, 687 based on Foata normal form. 22/4701 useless extension candidates. Maximal degree in co-relation 31957. Up to 3421 conditions per place. [2024-06-14 12:08:15,898 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 86 changer transitions 0/248 dead transitions. [2024-06-14 12:08:15,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 248 transitions, 3031 flow [2024-06-14 12:08:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:08:15,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:08:15,900 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 2205 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:08:15,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 248 transitions, 3031 flow [2024-06-14 12:08:16,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 248 transitions, 2870 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:16,076 INFO L231 Difference]: Finished difference. Result has 176 places, 208 transitions, 2312 flow [2024-06-14 12:08:16,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2312, PETRI_PLACES=176, PETRI_TRANSITIONS=208} [2024-06-14 12:08:16,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 12:08:16,077 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 208 transitions, 2312 flow [2024-06-14 12:08:16,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:16,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:16,077 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 12:08:16,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:08:16,077 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:16,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash 607679540, now seen corresponding path program 7 times [2024-06-14 12:08:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:16,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312499178] [2024-06-14 12:08:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:16,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:16,964 INFO 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 12:08:16,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:16,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312499178] [2024-06-14 12:08:16,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312499178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:16,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:16,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:16,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672296167] [2024-06-14 12:08:16,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:16,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:16,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:16,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:16,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:17,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:17,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 208 transitions, 2312 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:17,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:17,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:17,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:17,937 INFO L124 PetriNetUnfolderBase]: 3154/4914 cut-off events. [2024-06-14 12:08:17,938 INFO L125 PetriNetUnfolderBase]: For 265133/265148 co-relation queries the response was YES. [2024-06-14 12:08:17,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33934 conditions, 4914 events. 3154/4914 cut-off events. For 265133/265148 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26895 event pairs, 643 based on Foata normal form. 22/4929 useless extension candidates. Maximal degree in co-relation 33858. Up to 2622 conditions per place. [2024-06-14 12:08:17,983 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 101 changer transitions 0/254 dead transitions. [2024-06-14 12:08:17,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 254 transitions, 3182 flow [2024-06-14 12:08:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:08:17,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 12:08:17,988 INFO L175 Difference]: Start difference. First operand has 176 places, 208 transitions, 2312 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:08:17,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 254 transitions, 3182 flow [2024-06-14 12:08:18,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 254 transitions, 3057 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:18,209 INFO L231 Difference]: Finished difference. Result has 181 places, 211 transitions, 2546 flow [2024-06-14 12:08:18,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2546, PETRI_PLACES=181, PETRI_TRANSITIONS=211} [2024-06-14 12:08:18,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 12:08:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 211 transitions, 2546 flow [2024-06-14 12:08:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:18,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:18,210 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 12:08:18,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:08:18,211 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 341982260, now seen corresponding path program 8 times [2024-06-14 12:08:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:18,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831481113] [2024-06-14 12:08:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:18,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:19,137 INFO 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 12:08:19,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:19,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831481113] [2024-06-14 12:08:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831481113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:19,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:19,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530544183] [2024-06-14 12:08:19,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:19,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:19,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:19,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 211 transitions, 2546 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:19,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:19,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:19,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:20,137 INFO L124 PetriNetUnfolderBase]: 3212/5012 cut-off events. [2024-06-14 12:08:20,137 INFO L125 PetriNetUnfolderBase]: For 279279/279294 co-relation queries the response was YES. [2024-06-14 12:08:20,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35472 conditions, 5012 events. 3212/5012 cut-off events. For 279279/279294 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 27755 event pairs, 727 based on Foata normal form. 22/5027 useless extension candidates. Maximal degree in co-relation 35393. Up to 3906 conditions per place. [2024-06-14 12:08:20,183 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 86 changer transitions 0/253 dead transitions. [2024-06-14 12:08:20,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 253 transitions, 3359 flow [2024-06-14 12:08:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:20,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:08:20,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:08:20,188 INFO L175 Difference]: Start difference. First operand has 181 places, 211 transitions, 2546 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:08:20,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 253 transitions, 3359 flow [2024-06-14 12:08:20,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 253 transitions, 3281 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:20,404 INFO L231 Difference]: Finished difference. Result has 186 places, 212 transitions, 2696 flow [2024-06-14 12:08:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2696, PETRI_PLACES=186, PETRI_TRANSITIONS=212} [2024-06-14 12:08:20,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 12:08:20,405 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 212 transitions, 2696 flow [2024-06-14 12:08:20,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:20,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:20,405 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 12:08:20,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:08:20,406 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:20,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:20,406 INFO L85 PathProgramCache]: Analyzing trace with hash 840850624, now seen corresponding path program 9 times [2024-06-14 12:08:20,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:20,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695742300] [2024-06-14 12:08:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695742300] [2024-06-14 12:08:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695742300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:21,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:21,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:08:21,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106675585] [2024-06-14 12:08:21,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:21,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:08:21,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:08:21,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:08:21,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:21,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 212 transitions, 2696 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:21,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:21,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:21,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:22,295 INFO L124 PetriNetUnfolderBase]: 3237/5059 cut-off events. [2024-06-14 12:08:22,295 INFO L125 PetriNetUnfolderBase]: For 288576/288591 co-relation queries the response was YES. [2024-06-14 12:08:22,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35855 conditions, 5059 events. 3237/5059 cut-off events. For 288576/288591 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28122 event pairs, 748 based on Foata normal form. 26/5078 useless extension candidates. Maximal degree in co-relation 35774. Up to 4267 conditions per place. [2024-06-14 12:08:22,344 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 86 changer transitions 0/249 dead transitions. [2024-06-14 12:08:22,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3335 flow [2024-06-14 12:08:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:08:22,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:08:22,346 INFO L175 Difference]: Start difference. First operand has 186 places, 212 transitions, 2696 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:08:22,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3335 flow [2024-06-14 12:08:22,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 249 transitions, 2927 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-14 12:08:22,586 INFO L231 Difference]: Finished difference. Result has 185 places, 214 transitions, 2533 flow [2024-06-14 12:08:22,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2533, PETRI_PLACES=185, PETRI_TRANSITIONS=214} [2024-06-14 12:08:22,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 12:08:22,586 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 214 transitions, 2533 flow [2024-06-14 12:08:22,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:08:22,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:22,587 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 12:08:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:08:22,587 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 12:08:22,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash -531382269, now seen corresponding path program 3 times [2024-06-14 12:08:22,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990210835] [2024-06-14 12:08:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:23,282 INFO 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 12:08:23,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:23,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990210835] [2024-06-14 12:08:23,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990210835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:23,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:23,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:23,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556752816] [2024-06-14 12:08:23,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:23,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:23,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:23,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:23,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:23,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 214 transitions, 2533 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:23,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:23,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:23,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:24,253 INFO L124 PetriNetUnfolderBase]: 3339/5159 cut-off events. [2024-06-14 12:08:24,253 INFO L125 PetriNetUnfolderBase]: For 275418/275433 co-relation queries the response was YES. [2024-06-14 12:08:24,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35471 conditions, 5159 events. 3339/5159 cut-off events. For 275418/275433 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28209 event pairs, 872 based on Foata normal form. 8/5160 useless extension candidates. Maximal degree in co-relation 35391. Up to 5068 conditions per place. [2024-06-14 12:08:24,301 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 29 changer transitions 0/225 dead transitions. [2024-06-14 12:08:24,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 225 transitions, 3007 flow [2024-06-14 12:08:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 12:08:24,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-14 12:08:24,302 INFO L175 Difference]: Start difference. First operand has 185 places, 214 transitions, 2533 flow. Second operand 7 states and 108 transitions. [2024-06-14 12:08:24,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 225 transitions, 3007 flow [2024-06-14 12:08:24,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 225 transitions, 2760 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 12:08:24,550 INFO L231 Difference]: Finished difference. Result has 184 places, 214 transitions, 2350 flow [2024-06-14 12:08:24,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2350, PETRI_PLACES=184, PETRI_TRANSITIONS=214} [2024-06-14 12:08:24,551 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 12:08:24,551 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 214 transitions, 2350 flow [2024-06-14 12:08:24,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:24,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:24,552 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 12:08:24,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:08:24,552 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 12:08:24,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:24,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1784842645, now seen corresponding path program 2 times [2024-06-14 12:08:24,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:24,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477111048] [2024-06-14 12:08:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:24,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477111048] [2024-06-14 12:08:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477111048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:25,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027935956] [2024-06-14 12:08:25,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:25,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:25,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:25,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 214 transitions, 2350 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:25,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:25,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:25,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:26,248 INFO L124 PetriNetUnfolderBase]: 3344/5164 cut-off events. [2024-06-14 12:08:26,248 INFO L125 PetriNetUnfolderBase]: For 279037/279049 co-relation queries the response was YES. [2024-06-14 12:08:26,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35053 conditions, 5164 events. 3344/5164 cut-off events. For 279037/279049 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28259 event pairs, 858 based on Foata normal form. 9/5168 useless extension candidates. Maximal degree in co-relation 34972. Up to 5112 conditions per place. [2024-06-14 12:08:26,294 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 199 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-14 12:08:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2961 flow [2024-06-14 12:08:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-14 12:08:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-14 12:08:26,296 INFO L175 Difference]: Start difference. First operand has 184 places, 214 transitions, 2350 flow. Second operand 7 states and 106 transitions. [2024-06-14 12:08:26,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2961 flow [2024-06-14 12:08:26,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 228 transitions, 2871 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:26,525 INFO L231 Difference]: Finished difference. Result has 184 places, 217 transitions, 2360 flow [2024-06-14 12:08:26,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2360, PETRI_PLACES=184, PETRI_TRANSITIONS=217} [2024-06-14 12:08:26,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 12:08:26,526 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 217 transitions, 2360 flow [2024-06-14 12:08:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:26,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:26,526 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 12:08:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:08:26,527 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 12:08:26,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1784426935, now seen corresponding path program 3 times [2024-06-14 12:08:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:26,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945191601] [2024-06-14 12:08:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:26,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:27,228 INFO 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 12:08:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945191601] [2024-06-14 12:08:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945191601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:27,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:27,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:27,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394278923] [2024-06-14 12:08:27,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:27,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:27,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:27,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:27,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 217 transitions, 2360 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:27,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:27,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:27,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:28,154 INFO L124 PetriNetUnfolderBase]: 3341/5160 cut-off events. [2024-06-14 12:08:28,154 INFO L125 PetriNetUnfolderBase]: For 288047/288059 co-relation queries the response was YES. [2024-06-14 12:08:28,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35170 conditions, 5160 events. 3341/5160 cut-off events. For 288047/288059 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28239 event pairs, 858 based on Foata normal form. 9/5164 useless extension candidates. Maximal degree in co-relation 35088. Up to 5109 conditions per place. [2024-06-14 12:08:28,201 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 27 changer transitions 0/227 dead transitions. [2024-06-14 12:08:28,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 227 transitions, 2835 flow [2024-06-14 12:08:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:08:28,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-14 12:08:28,202 INFO L175 Difference]: Start difference. First operand has 184 places, 217 transitions, 2360 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:08:28,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 227 transitions, 2835 flow [2024-06-14 12:08:28,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 227 transitions, 2739 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:28,449 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2324 flow [2024-06-14 12:08:28,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2324, PETRI_PLACES=187, PETRI_TRANSITIONS=217} [2024-06-14 12:08:28,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-14 12:08:28,449 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2324 flow [2024-06-14 12:08:28,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:28,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:28,450 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 12:08:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:08:28,451 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 12:08:28,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1530015665, now seen corresponding path program 1 times [2024-06-14 12:08:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675765272] [2024-06-14 12:08:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:29,188 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 12:08:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675765272] [2024-06-14 12:08:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675765272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:29,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:29,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:29,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564411574] [2024-06-14 12:08:29,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:29,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:29,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:29,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:29,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 217 transitions, 2324 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:29,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:29,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:29,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:30,118 INFO L124 PetriNetUnfolderBase]: 3175/4989 cut-off events. [2024-06-14 12:08:30,118 INFO L125 PetriNetUnfolderBase]: For 259467/259467 co-relation queries the response was YES. [2024-06-14 12:08:30,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33049 conditions, 4989 events. 3175/4989 cut-off events. For 259467/259467 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28010 event pairs, 770 based on Foata normal form. 1/4978 useless extension candidates. Maximal degree in co-relation 32966. Up to 4873 conditions per place. [2024-06-14 12:08:30,165 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 214 selfloop transitions, 14 changer transitions 0/236 dead transitions. [2024-06-14 12:08:30,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 236 transitions, 2873 flow [2024-06-14 12:08:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:08:30,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-14 12:08:30,166 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2324 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:08:30,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 236 transitions, 2873 flow [2024-06-14 12:08:30,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 236 transitions, 2821 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:30,422 INFO L231 Difference]: Finished difference. Result has 189 places, 220 transitions, 2362 flow [2024-06-14 12:08:30,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2362, PETRI_PLACES=189, PETRI_TRANSITIONS=220} [2024-06-14 12:08:30,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-14 12:08:30,422 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 220 transitions, 2362 flow [2024-06-14 12:08:30,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:30,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:30,423 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 12:08:30,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:08:30,423 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 12:08:30,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1120700919, now seen corresponding path program 1 times [2024-06-14 12:08:30,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:30,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416243917] [2024-06-14 12:08:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:31,137 INFO 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 12:08:31,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416243917] [2024-06-14 12:08:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416243917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:31,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:31,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919970830] [2024-06-14 12:08:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:31,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:31,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 220 transitions, 2362 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:31,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:31,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:31,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:31,952 INFO L124 PetriNetUnfolderBase]: 3193/5016 cut-off events. [2024-06-14 12:08:31,952 INFO L125 PetriNetUnfolderBase]: For 271194/271194 co-relation queries the response was YES. [2024-06-14 12:08:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33684 conditions, 5016 events. 3193/5016 cut-off events. For 271194/271194 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28195 event pairs, 771 based on Foata normal form. 2/5006 useless extension candidates. Maximal degree in co-relation 33600. Up to 4879 conditions per place. [2024-06-14 12:08:31,998 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-14 12:08:31,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 245 transitions, 3047 flow [2024-06-14 12:08:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:08:32,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-14 12:08:32,000 INFO L175 Difference]: Start difference. First operand has 189 places, 220 transitions, 2362 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:08:32,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 245 transitions, 3047 flow [2024-06-14 12:08:32,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 245 transitions, 2979 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:32,231 INFO L231 Difference]: Finished difference. Result has 192 places, 229 transitions, 2446 flow [2024-06-14 12:08:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2446, PETRI_PLACES=192, PETRI_TRANSITIONS=229} [2024-06-14 12:08:32,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-14 12:08:32,231 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 229 transitions, 2446 flow [2024-06-14 12:08:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:32,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:32,232 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 12:08:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:08:32,232 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 12:08:32,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1961789839, now seen corresponding path program 2 times [2024-06-14 12:08:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:32,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864093654] [2024-06-14 12:08:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:32,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:33,033 INFO 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 12:08:33,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:33,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864093654] [2024-06-14 12:08:33,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864093654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:33,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:33,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:33,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959412243] [2024-06-14 12:08:33,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:33,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:33,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:33,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:33,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:33,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 229 transitions, 2446 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:33,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:33,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:33,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:33,858 INFO L124 PetriNetUnfolderBase]: 3198/5023 cut-off events. [2024-06-14 12:08:33,858 INFO L125 PetriNetUnfolderBase]: For 280721/280721 co-relation queries the response was YES. [2024-06-14 12:08:33,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34417 conditions, 5023 events. 3198/5023 cut-off events. For 280721/280721 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28188 event pairs, 770 based on Foata normal form. 1/5012 useless extension candidates. Maximal degree in co-relation 34331. Up to 4889 conditions per place. [2024-06-14 12:08:33,903 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 26 changer transitions 0/249 dead transitions. [2024-06-14 12:08:33,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 249 transitions, 3179 flow [2024-06-14 12:08:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:08:33,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-14 12:08:33,905 INFO L175 Difference]: Start difference. First operand has 192 places, 229 transitions, 2446 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:08:33,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 249 transitions, 3179 flow [2024-06-14 12:08:34,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 249 transitions, 3143 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:34,173 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2590 flow [2024-06-14 12:08:34,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2590, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2024-06-14 12:08:34,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 12:08:34,173 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2590 flow [2024-06-14 12:08:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:34,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:34,174 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 12:08:34,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:08:34,174 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 12:08:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1730388815, now seen corresponding path program 3 times [2024-06-14 12:08:34,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:34,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574726212] [2024-06-14 12:08:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:34,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:34,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574726212] [2024-06-14 12:08:34,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574726212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:34,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:34,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:34,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960250140] [2024-06-14 12:08:34,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:34,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:34,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:34,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:34,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:34,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:34,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 2590 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:34,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:34,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:34,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:35,783 INFO L124 PetriNetUnfolderBase]: 3209/5038 cut-off events. [2024-06-14 12:08:35,783 INFO L125 PetriNetUnfolderBase]: For 292438/292438 co-relation queries the response was YES. [2024-06-14 12:08:35,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34985 conditions, 5038 events. 3209/5038 cut-off events. For 292438/292438 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28296 event pairs, 769 based on Foata normal form. 1/5027 useless extension candidates. Maximal degree in co-relation 34896. Up to 4932 conditions per place. [2024-06-14 12:08:35,830 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 14 changer transitions 0/245 dead transitions. [2024-06-14 12:08:35,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 245 transitions, 3091 flow [2024-06-14 12:08:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 12:08:35,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-14 12:08:35,831 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2590 flow. Second operand 7 states and 107 transitions. [2024-06-14 12:08:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 245 transitions, 3091 flow [2024-06-14 12:08:36,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 245 transitions, 2981 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:36,132 INFO L231 Difference]: Finished difference. Result has 201 places, 235 transitions, 2514 flow [2024-06-14 12:08:36,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=201, PETRI_TRANSITIONS=235} [2024-06-14 12:08:36,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-14 12:08:36,133 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 235 transitions, 2514 flow [2024-06-14 12:08:36,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:36,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:36,134 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 12:08:36,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:08:36,134 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:36,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1957141513, now seen corresponding path program 2 times [2024-06-14 12:08:36,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:36,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670749676] [2024-06-14 12:08:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:36,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:36,942 INFO 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 12:08:36,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:36,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670749676] [2024-06-14 12:08:36,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670749676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:36,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:36,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:36,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509424373] [2024-06-14 12:08:36,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:36,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:36,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:36,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:36,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:37,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:37,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 235 transitions, 2514 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:37,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:37,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:37,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:37,858 INFO L124 PetriNetUnfolderBase]: 3210/5040 cut-off events. [2024-06-14 12:08:37,858 INFO L125 PetriNetUnfolderBase]: For 303098/303098 co-relation queries the response was YES. [2024-06-14 12:08:37,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35062 conditions, 5040 events. 3210/5040 cut-off events. For 303098/303098 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 28283 event pairs, 769 based on Foata normal form. 3/5031 useless extension candidates. Maximal degree in co-relation 34971. Up to 4926 conditions per place. [2024-06-14 12:08:37,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 18 changer transitions 0/250 dead transitions. [2024-06-14 12:08:37,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 250 transitions, 3079 flow [2024-06-14 12:08:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:08:37,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-14 12:08:37,907 INFO L175 Difference]: Start difference. First operand has 201 places, 235 transitions, 2514 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:08:37,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 250 transitions, 3079 flow [2024-06-14 12:08:38,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 250 transitions, 3031 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:38,217 INFO L231 Difference]: Finished difference. Result has 204 places, 240 transitions, 2575 flow [2024-06-14 12:08:38,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2575, PETRI_PLACES=204, PETRI_TRANSITIONS=240} [2024-06-14 12:08:38,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-14 12:08:38,218 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 240 transitions, 2575 flow [2024-06-14 12:08:38,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:38,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:38,218 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 12:08:38,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:08:38,218 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 12:08:38,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1784658133, now seen corresponding path program 3 times [2024-06-14 12:08:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597183719] [2024-06-14 12:08:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:38,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:38,970 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 12:08:38,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:38,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597183719] [2024-06-14 12:08:38,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597183719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:38,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:38,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:38,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612644064] [2024-06-14 12:08:38,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:38,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:38,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:38,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:38,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:39,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:39,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 240 transitions, 2575 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:39,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:39,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:39,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:39,879 INFO L124 PetriNetUnfolderBase]: 3204/5032 cut-off events. [2024-06-14 12:08:39,880 INFO L125 PetriNetUnfolderBase]: For 309129/309129 co-relation queries the response was YES. [2024-06-14 12:08:39,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35142 conditions, 5032 events. 3204/5032 cut-off events. For 309129/309129 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28320 event pairs, 768 based on Foata normal form. 2/5022 useless extension candidates. Maximal degree in co-relation 35049. Up to 4909 conditions per place. [2024-06-14 12:08:39,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 22 changer transitions 0/251 dead transitions. [2024-06-14 12:08:39,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 251 transitions, 3091 flow [2024-06-14 12:08:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:08:39,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-14 12:08:39,924 INFO L175 Difference]: Start difference. First operand has 204 places, 240 transitions, 2575 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:08:39,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 251 transitions, 3091 flow [2024-06-14 12:08:40,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 251 transitions, 3021 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:40,236 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 2555 flow [2024-06-14 12:08:40,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2555, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-14 12:08:40,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-14 12:08:40,237 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 2555 flow [2024-06-14 12:08:40,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:40,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:40,238 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 12:08:40,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:08:40,238 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:40,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:40,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2029040111, now seen corresponding path program 1 times [2024-06-14 12:08:40,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:40,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915335272] [2024-06-14 12:08:40,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:40,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:41,602 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 12:08:41,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:41,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915335272] [2024-06-14 12:08:41,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915335272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:41,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:41,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913630929] [2024-06-14 12:08:41,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:41,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:41,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:41,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:41,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:41,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:41,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 2555 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:08:41,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:41,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:41,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:42,785 INFO L124 PetriNetUnfolderBase]: 3333/5195 cut-off events. [2024-06-14 12:08:42,786 INFO L125 PetriNetUnfolderBase]: For 385219/385219 co-relation queries the response was YES. [2024-06-14 12:08:42,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38035 conditions, 5195 events. 3333/5195 cut-off events. For 385219/385219 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28849 event pairs, 635 based on Foata normal form. 12/5198 useless extension candidates. Maximal degree in co-relation 37942. Up to 4882 conditions per place. [2024-06-14 12:08:42,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 22 changer transitions 0/284 dead transitions. [2024-06-14 12:08:42,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 284 transitions, 3262 flow [2024-06-14 12:08:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 12:08:42,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:08:42,862 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 2555 flow. Second operand 10 states and 170 transitions. [2024-06-14 12:08:42,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 284 transitions, 3262 flow [2024-06-14 12:08:43,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 284 transitions, 3193 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:43,219 INFO L231 Difference]: Finished difference. Result has 211 places, 243 transitions, 2601 flow [2024-06-14 12:08:43,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2601, PETRI_PLACES=211, PETRI_TRANSITIONS=243} [2024-06-14 12:08:43,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-14 12:08:43,220 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 243 transitions, 2601 flow [2024-06-14 12:08:43,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:08:43,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:43,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:08:43,221 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2087247881, now seen corresponding path program 2 times [2024-06-14 12:08:43,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851758454] [2024-06-14 12:08:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:44,616 INFO 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 12:08:44,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:44,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851758454] [2024-06-14 12:08:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851758454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:44,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093242992] [2024-06-14 12:08:44,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:44,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:44,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 243 transitions, 2601 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:08:44,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:44,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:44,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:45,851 INFO L124 PetriNetUnfolderBase]: 3369/5261 cut-off events. [2024-06-14 12:08:45,851 INFO L125 PetriNetUnfolderBase]: For 397012/397012 co-relation queries the response was YES. [2024-06-14 12:08:45,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38796 conditions, 5261 events. 3369/5261 cut-off events. For 397012/397012 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 29443 event pairs, 787 based on Foata normal form. 12/5270 useless extension candidates. Maximal degree in co-relation 38701. Up to 4938 conditions per place. [2024-06-14 12:08:45,906 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 29 changer transitions 0/287 dead transitions. [2024-06-14 12:08:45,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 3317 flow [2024-06-14 12:08:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 12:08:45,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-14 12:08:45,908 INFO L175 Difference]: Start difference. First operand has 211 places, 243 transitions, 2601 flow. Second operand 10 states and 172 transitions. [2024-06-14 12:08:45,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 3317 flow [2024-06-14 12:08:46,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 287 transitions, 3231 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 12:08:46,394 INFO L231 Difference]: Finished difference. Result has 216 places, 246 transitions, 2653 flow [2024-06-14 12:08:46,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2653, PETRI_PLACES=216, PETRI_TRANSITIONS=246} [2024-06-14 12:08:46,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 12:08:46,394 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 246 transitions, 2653 flow [2024-06-14 12:08:46,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:08:46,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:46,395 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 12:08:46,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:08:46,395 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:46,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash 618593287, now seen corresponding path program 3 times [2024-06-14 12:08:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:46,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326627629] [2024-06-14 12:08:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:47,822 INFO 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 12:08:47,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:47,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326627629] [2024-06-14 12:08:47,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326627629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:47,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:47,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:08:47,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588928843] [2024-06-14 12:08:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:47,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:08:47,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:08:47,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:08:47,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:47,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 246 transitions, 2653 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:08:47,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:47,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:47,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:49,172 INFO L124 PetriNetUnfolderBase]: 3410/5332 cut-off events. [2024-06-14 12:08:49,172 INFO L125 PetriNetUnfolderBase]: For 415743/415743 co-relation queries the response was YES. [2024-06-14 12:08:49,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39370 conditions, 5332 events. 3410/5332 cut-off events. For 415743/415743 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30035 event pairs, 797 based on Foata normal form. 12/5341 useless extension candidates. Maximal degree in co-relation 39272. Up to 4963 conditions per place. [2024-06-14 12:08:49,224 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 32 changer transitions 0/290 dead transitions. [2024-06-14 12:08:49,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 290 transitions, 3380 flow [2024-06-14 12:08:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 12:08:49,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-14 12:08:49,226 INFO L175 Difference]: Start difference. First operand has 216 places, 246 transitions, 2653 flow. Second operand 10 states and 173 transitions. [2024-06-14 12:08:49,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 290 transitions, 3380 flow [2024-06-14 12:08:49,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 290 transitions, 3294 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:49,640 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2713 flow [2024-06-14 12:08:49,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2567, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2713, PETRI_PLACES=221, PETRI_TRANSITIONS=249} [2024-06-14 12:08:49,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 12:08:49,641 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2713 flow [2024-06-14 12:08:49,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:08:49,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:49,641 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 12:08:49,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:08:49,641 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 12:08:49,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:49,642 INFO L85 PathProgramCache]: Analyzing trace with hash -849928203, now seen corresponding path program 1 times [2024-06-14 12:08:49,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:49,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119036219] [2024-06-14 12:08:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:49,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:50,404 INFO 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 12:08:50,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:50,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119036219] [2024-06-14 12:08:50,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119036219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:50,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:50,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133892493] [2024-06-14 12:08:50,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:50,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:50,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:50,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:50,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 249 transitions, 2713 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:50,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:50,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:50,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:51,576 INFO L124 PetriNetUnfolderBase]: 3510/5436 cut-off events. [2024-06-14 12:08:51,577 INFO L125 PetriNetUnfolderBase]: For 415910/415910 co-relation queries the response was YES. [2024-06-14 12:08:51,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40046 conditions, 5436 events. 3510/5436 cut-off events. For 415910/415910 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30236 event pairs, 853 based on Foata normal form. 2/5435 useless extension candidates. Maximal degree in co-relation 39946. Up to 5308 conditions per place. [2024-06-14 12:08:51,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-14 12:08:51,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 280 transitions, 3520 flow [2024-06-14 12:08:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:08:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:08:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:08:51,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:08:51,635 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2713 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:08:51,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 280 transitions, 3520 flow [2024-06-14 12:08:52,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 280 transitions, 3402 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:08:52,021 INFO L231 Difference]: Finished difference. Result has 221 places, 255 transitions, 2763 flow [2024-06-14 12:08:52,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2595, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2763, PETRI_PLACES=221, PETRI_TRANSITIONS=255} [2024-06-14 12:08:52,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 12:08:52,022 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 255 transitions, 2763 flow [2024-06-14 12:08:52,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:52,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:52,022 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 12:08:52,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:08:52,023 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 12:08:52,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1893487520, now seen corresponding path program 1 times [2024-06-14 12:08:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:52,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324442354] [2024-06-14 12:08:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:52,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:52,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324442354] [2024-06-14 12:08:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324442354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:52,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:52,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718031190] [2024-06-14 12:08:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:52,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:52,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:52,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 255 transitions, 2763 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:52,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:52,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:52,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:53,810 INFO L124 PetriNetUnfolderBase]: 3523/5454 cut-off events. [2024-06-14 12:08:53,810 INFO L125 PetriNetUnfolderBase]: For 427247/427247 co-relation queries the response was YES. [2024-06-14 12:08:53,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40546 conditions, 5454 events. 3523/5454 cut-off events. For 427247/427247 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30307 event pairs, 851 based on Foata normal form. 1/5452 useless extension candidates. Maximal degree in co-relation 40446. Up to 5399 conditions per place. [2024-06-14 12:08:53,865 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 252 selfloop transitions, 25 changer transitions 0/280 dead transitions. [2024-06-14 12:08:53,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 280 transitions, 3576 flow [2024-06-14 12:08:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:08:53,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-14 12:08:53,867 INFO L175 Difference]: Start difference. First operand has 221 places, 255 transitions, 2763 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:08:53,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 280 transitions, 3576 flow [2024-06-14 12:08:54,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 280 transitions, 3507 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:54,343 INFO L231 Difference]: Finished difference. Result has 224 places, 261 transitions, 2848 flow [2024-06-14 12:08:54,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2848, PETRI_PLACES=224, PETRI_TRANSITIONS=261} [2024-06-14 12:08:54,343 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 12:08:54,344 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 261 transitions, 2848 flow [2024-06-14 12:08:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:54,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:54,344 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 12:08:54,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:08:54,344 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:08:54,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash 133548098, now seen corresponding path program 2 times [2024-06-14 12:08:54,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:54,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692849316] [2024-06-14 12:08:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:54,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:55,087 INFO 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 12:08:55,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692849316] [2024-06-14 12:08:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692849316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:55,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:55,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:55,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572766745] [2024-06-14 12:08:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:55,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:55,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:55,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:55,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:08:55,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 261 transitions, 2848 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:55,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:55,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:08:55,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:56,096 INFO L124 PetriNetUnfolderBase]: 3528/5461 cut-off events. [2024-06-14 12:08:56,097 INFO L125 PetriNetUnfolderBase]: For 442136/442136 co-relation queries the response was YES. [2024-06-14 12:08:56,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41143 conditions, 5461 events. 3528/5461 cut-off events. For 442136/442136 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30330 event pairs, 851 based on Foata normal form. 1/5459 useless extension candidates. Maximal degree in co-relation 41041. Up to 5421 conditions per place. [2024-06-14 12:08:56,159 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 20 changer transitions 0/279 dead transitions. [2024-06-14 12:08:56,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 279 transitions, 3495 flow [2024-06-14 12:08:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 12:08:56,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-14 12:08:56,160 INFO L175 Difference]: Start difference. First operand has 224 places, 261 transitions, 2848 flow. Second operand 7 states and 109 transitions. [2024-06-14 12:08:56,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 279 transitions, 3495 flow [2024-06-14 12:08:56,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 279 transitions, 3391 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:56,703 INFO L231 Difference]: Finished difference. Result has 228 places, 264 transitions, 2848 flow [2024-06-14 12:08:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2848, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2024-06-14 12:08:56,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 12:08:56,703 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 2848 flow [2024-06-14 12:08:56,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:56,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:56,704 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 12:08:56,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:08:56,704 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 12:08:56,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash -394608631, now seen corresponding path program 4 times [2024-06-14 12:08:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:56,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597183470] [2024-06-14 12:08:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:57,909 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 12:08:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597183470] [2024-06-14 12:08:57,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597183470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:57,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:57,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:08:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289442759] [2024-06-14 12:08:57,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:57,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:08:57,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:57,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:08:57,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:08:58,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:08:58,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 2848 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:08:58,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:58,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:08:58,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:59,139 INFO L124 PetriNetUnfolderBase]: 3416/5335 cut-off events. [2024-06-14 12:08:59,139 INFO L125 PetriNetUnfolderBase]: For 456244/456246 co-relation queries the response was YES. [2024-06-14 12:08:59,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40189 conditions, 5335 events. 3416/5335 cut-off events. For 456244/456246 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30015 event pairs, 766 based on Foata normal form. 12/5339 useless extension candidates. Maximal degree in co-relation 40085. Up to 4813 conditions per place. [2024-06-14 12:08:59,198 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 46 changer transitions 0/299 dead transitions. [2024-06-14 12:08:59,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 299 transitions, 3508 flow [2024-06-14 12:08:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:08:59,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:08:59,200 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 2848 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:08:59,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 299 transitions, 3508 flow [2024-06-14 12:08:59,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 299 transitions, 3434 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:59,654 INFO L231 Difference]: Finished difference. Result has 233 places, 265 transitions, 2893 flow [2024-06-14 12:08:59,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2893, PETRI_PLACES=233, PETRI_TRANSITIONS=265} [2024-06-14 12:08:59,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 12:08:59,654 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 265 transitions, 2893 flow [2024-06-14 12:08:59,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:08:59,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:59,655 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 12:08:59,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:08:59,655 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 12:08:59,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:59,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1447821155, now seen corresponding path program 5 times [2024-06-14 12:08:59,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:59,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380263892] [2024-06-14 12:08:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:59,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:00,828 INFO 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 12:09:00,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380263892] [2024-06-14 12:09:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380263892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:00,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:09:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83314805] [2024-06-14 12:09:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:09:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:09:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:09:00,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:00,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 265 transitions, 2893 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:09:00,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:00,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:00,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:02,192 INFO L124 PetriNetUnfolderBase]: 3459/5410 cut-off events. [2024-06-14 12:09:02,192 INFO L125 PetriNetUnfolderBase]: For 472271/472271 co-relation queries the response was YES. [2024-06-14 12:09:02,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41023 conditions, 5410 events. 3459/5410 cut-off events. For 472271/472271 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30556 event pairs, 771 based on Foata normal form. 12/5419 useless extension candidates. Maximal degree in co-relation 40917. Up to 4811 conditions per place. [2024-06-14 12:09:02,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 51 changer transitions 0/302 dead transitions. [2024-06-14 12:09:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 302 transitions, 3623 flow [2024-06-14 12:09:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:09:02,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-14 12:09:02,244 INFO L175 Difference]: Start difference. First operand has 233 places, 265 transitions, 2893 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:09:02,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 302 transitions, 3623 flow [2024-06-14 12:09:02,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 302 transitions, 3511 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:02,615 INFO L231 Difference]: Finished difference. Result has 236 places, 268 transitions, 2984 flow [2024-06-14 12:09:02,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2984, PETRI_PLACES=236, PETRI_TRANSITIONS=268} [2024-06-14 12:09:02,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-14 12:09:02,615 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 268 transitions, 2984 flow [2024-06-14 12:09:02,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:09:02,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:02,616 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 12:09:02,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:09:02,616 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:02,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:02,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2113456400, now seen corresponding path program 1 times [2024-06-14 12:09:02,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:02,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574801785] [2024-06-14 12:09:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:02,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:03,393 INFO 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 12:09:03,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:03,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574801785] [2024-06-14 12:09:03,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574801785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:03,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:03,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840279772] [2024-06-14 12:09:03,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:03,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:03,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:03,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:03,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 268 transitions, 2984 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:03,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:03,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:03,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:04,630 INFO L124 PetriNetUnfolderBase]: 3559/5514 cut-off events. [2024-06-14 12:09:04,630 INFO L125 PetriNetUnfolderBase]: For 459488/459488 co-relation queries the response was YES. [2024-06-14 12:09:04,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41638 conditions, 5514 events. 3559/5514 cut-off events. For 459488/459488 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30741 event pairs, 852 based on Foata normal form. 2/5513 useless extension candidates. Maximal degree in co-relation 41530. Up to 5438 conditions per place. [2024-06-14 12:09:04,683 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 35 changer transitions 0/293 dead transitions. [2024-06-14 12:09:04,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 293 transitions, 3835 flow [2024-06-14 12:09:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:09:04,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:09:04,685 INFO L175 Difference]: Start difference. First operand has 236 places, 268 transitions, 2984 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:09:04,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 293 transitions, 3835 flow [2024-06-14 12:09:05,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 293 transitions, 3680 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:05,067 INFO L231 Difference]: Finished difference. Result has 238 places, 274 transitions, 3009 flow [2024-06-14 12:09:05,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3009, PETRI_PLACES=238, PETRI_TRANSITIONS=274} [2024-06-14 12:09:05,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 12:09:05,068 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 274 transitions, 3009 flow [2024-06-14 12:09:05,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:05,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:05,068 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 12:09:05,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:09:05,068 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 12:09:05,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1887766067, now seen corresponding path program 2 times [2024-06-14 12:09:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:05,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863573514] [2024-06-14 12:09:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:05,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:05,851 INFO 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 12:09:05,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:05,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863573514] [2024-06-14 12:09:05,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863573514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:05,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:05,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:05,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107986541] [2024-06-14 12:09:05,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:05,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:05,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:05,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 274 transitions, 3009 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:05,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:05,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:05,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:07,175 INFO L124 PetriNetUnfolderBase]: 3585/5550 cut-off events. [2024-06-14 12:09:07,175 INFO L125 PetriNetUnfolderBase]: For 458912/458912 co-relation queries the response was YES. [2024-06-14 12:09:07,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41616 conditions, 5550 events. 3585/5550 cut-off events. For 458912/458912 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30935 event pairs, 852 based on Foata normal form. 2/5549 useless extension candidates. Maximal degree in co-relation 41508. Up to 5411 conditions per place. [2024-06-14 12:09:07,235 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 48 changer transitions 0/301 dead transitions. [2024-06-14 12:09:07,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 301 transitions, 3971 flow [2024-06-14 12:09:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:09:07,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:09:07,237 INFO L175 Difference]: Start difference. First operand has 238 places, 274 transitions, 3009 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:09:07,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 301 transitions, 3971 flow [2024-06-14 12:09:07,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 301 transitions, 3904 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:07,611 INFO L231 Difference]: Finished difference. Result has 242 places, 280 transitions, 3112 flow [2024-06-14 12:09:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3112, PETRI_PLACES=242, PETRI_TRANSITIONS=280} [2024-06-14 12:09:07,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-14 12:09:07,612 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 280 transitions, 3112 flow [2024-06-14 12:09:07,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:07,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:07,612 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 12:09:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:09:07,613 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 12:09:07,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1887777227, now seen corresponding path program 3 times [2024-06-14 12:09:07,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:07,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236352492] [2024-06-14 12:09:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:08,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236352492] [2024-06-14 12:09:08,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236352492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:08,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:08,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:08,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844847460] [2024-06-14 12:09:08,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:08,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:08,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:08,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:08,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:08,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 280 transitions, 3112 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:08,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:08,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:08,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:09,877 INFO L124 PetriNetUnfolderBase]: 3579/5542 cut-off events. [2024-06-14 12:09:09,878 INFO L125 PetriNetUnfolderBase]: For 468741/468741 co-relation queries the response was YES. [2024-06-14 12:09:09,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41747 conditions, 5542 events. 3579/5542 cut-off events. For 468741/468741 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30893 event pairs, 852 based on Foata normal form. 2/5541 useless extension candidates. Maximal degree in co-relation 41637. Up to 5406 conditions per place. [2024-06-14 12:09:09,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-14 12:09:09,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 300 transitions, 3884 flow [2024-06-14 12:09:09,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:09:09,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-14 12:09:09,939 INFO L175 Difference]: Start difference. First operand has 242 places, 280 transitions, 3112 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:09:09,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 300 transitions, 3884 flow [2024-06-14 12:09:10,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 300 transitions, 3782 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:10,512 INFO L231 Difference]: Finished difference. Result has 246 places, 280 transitions, 3110 flow [2024-06-14 12:09:10,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3110, PETRI_PLACES=246, PETRI_TRANSITIONS=280} [2024-06-14 12:09:10,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 12:09:10,512 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 280 transitions, 3110 flow [2024-06-14 12:09:10,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:10,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:10,513 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 12:09:10,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:09:10,513 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 12:09:10,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:10,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2043342222, now seen corresponding path program 3 times [2024-06-14 12:09:10,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:10,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881093339] [2024-06-14 12:09:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:10,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:11,309 INFO 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 12:09:11,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:11,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881093339] [2024-06-14 12:09:11,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881093339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:11,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:11,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:11,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953207049] [2024-06-14 12:09:11,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:11,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:11,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:11,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:11,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:11,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:11,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 280 transitions, 3110 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:11,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:11,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:11,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:12,312 INFO L124 PetriNetUnfolderBase]: 3584/5550 cut-off events. [2024-06-14 12:09:12,313 INFO L125 PetriNetUnfolderBase]: For 481071/481077 co-relation queries the response was YES. [2024-06-14 12:09:12,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41992 conditions, 5550 events. 3584/5550 cut-off events. For 481071/481077 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30982 event pairs, 861 based on Foata normal form. 5/5551 useless extension candidates. Maximal degree in co-relation 41881. Up to 5460 conditions per place. [2024-06-14 12:09:12,370 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 41 changer transitions 0/304 dead transitions. [2024-06-14 12:09:12,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 304 transitions, 4117 flow [2024-06-14 12:09:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:09:12,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-14 12:09:12,371 INFO L175 Difference]: Start difference. First operand has 246 places, 280 transitions, 3110 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:09:12,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 304 transitions, 4117 flow [2024-06-14 12:09:12,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 304 transitions, 4015 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:12,879 INFO L231 Difference]: Finished difference. Result has 246 places, 286 transitions, 3210 flow [2024-06-14 12:09:12,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3210, PETRI_PLACES=246, PETRI_TRANSITIONS=286} [2024-06-14 12:09:12,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 12:09:12,880 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 3210 flow [2024-06-14 12:09:12,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:12,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:12,880 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 12:09:12,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:09:12,880 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 12:09:12,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash -685949856, now seen corresponding path program 4 times [2024-06-14 12:09:12,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:12,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705462452] [2024-06-14 12:09:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:12,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:13,590 INFO 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 12:09:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705462452] [2024-06-14 12:09:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705462452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:13,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602676970] [2024-06-14 12:09:13,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:13,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:13,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 286 transitions, 3210 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:13,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:13,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:13,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:14,627 INFO L124 PetriNetUnfolderBase]: 3589/5558 cut-off events. [2024-06-14 12:09:14,627 INFO L125 PetriNetUnfolderBase]: For 496871/496883 co-relation queries the response was YES. [2024-06-14 12:09:14,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42546 conditions, 5558 events. 3589/5558 cut-off events. For 496871/496883 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 31028 event pairs, 859 based on Foata normal form. 9/5562 useless extension candidates. Maximal degree in co-relation 42434. Up to 5466 conditions per place. [2024-06-14 12:09:14,684 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 44 changer transitions 0/303 dead transitions. [2024-06-14 12:09:14,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 303 transitions, 4035 flow [2024-06-14 12:09:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:09:14,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-14 12:09:14,685 INFO L175 Difference]: Start difference. First operand has 246 places, 286 transitions, 3210 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:09:14,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 303 transitions, 4035 flow [2024-06-14 12:09:15,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 303 transitions, 3893 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:15,225 INFO L231 Difference]: Finished difference. Result has 250 places, 289 transitions, 3222 flow [2024-06-14 12:09:15,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=250, PETRI_TRANSITIONS=289} [2024-06-14 12:09:15,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 12:09:15,226 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 289 transitions, 3222 flow [2024-06-14 12:09:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:15,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:15,226 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 12:09:15,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:09:15,227 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 12:09:15,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:15,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1649014992, now seen corresponding path program 5 times [2024-06-14 12:09:15,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:15,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482989419] [2024-06-14 12:09:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:15,883 INFO 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 12:09:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482989419] [2024-06-14 12:09:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482989419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:15,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:15,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:15,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316275160] [2024-06-14 12:09:15,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:15,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:15,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:15,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:15,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:15,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:15,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 289 transitions, 3222 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:15,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:15,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:15,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:16,974 INFO L124 PetriNetUnfolderBase]: 3586/5554 cut-off events. [2024-06-14 12:09:16,974 INFO L125 PetriNetUnfolderBase]: For 508855/508867 co-relation queries the response was YES. [2024-06-14 12:09:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42667 conditions, 5554 events. 3586/5554 cut-off events. For 508855/508867 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30986 event pairs, 856 based on Foata normal form. 9/5558 useless extension candidates. Maximal degree in co-relation 42553. Up to 5512 conditions per place. [2024-06-14 12:09:17,033 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 19 changer transitions 0/299 dead transitions. [2024-06-14 12:09:17,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 299 transitions, 3843 flow [2024-06-14 12:09:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-14 12:09:17,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-14 12:09:17,034 INFO L175 Difference]: Start difference. First operand has 250 places, 289 transitions, 3222 flow. Second operand 7 states and 103 transitions. [2024-06-14 12:09:17,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 299 transitions, 3843 flow [2024-06-14 12:09:17,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 299 transitions, 3751 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:17,515 INFO L231 Difference]: Finished difference. Result has 253 places, 289 transitions, 3174 flow [2024-06-14 12:09:17,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3174, PETRI_PLACES=253, PETRI_TRANSITIONS=289} [2024-06-14 12:09:17,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-14 12:09:17,516 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 289 transitions, 3174 flow [2024-06-14 12:09:17,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:17,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:17,516 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 12:09:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:09:17,516 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 12:09:17,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:17,516 INFO L85 PathProgramCache]: Analyzing trace with hash -238112348, now seen corresponding path program 6 times [2024-06-14 12:09:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:17,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210592977] [2024-06-14 12:09:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:17,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:18,297 INFO 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 12:09:18,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:18,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210592977] [2024-06-14 12:09:18,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210592977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:18,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:18,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854089544] [2024-06-14 12:09:18,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:18,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:18,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:18,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 289 transitions, 3174 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:18,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:18,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:18,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:19,381 INFO L124 PetriNetUnfolderBase]: 3583/5550 cut-off events. [2024-06-14 12:09:19,381 INFO L125 PetriNetUnfolderBase]: For 520971/520983 co-relation queries the response was YES. [2024-06-14 12:09:19,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42728 conditions, 5550 events. 3583/5550 cut-off events. For 520971/520983 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30990 event pairs, 856 based on Foata normal form. 9/5554 useless extension candidates. Maximal degree in co-relation 42613. Up to 5499 conditions per place. [2024-06-14 12:09:19,434 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 27 changer transitions 0/299 dead transitions. [2024-06-14 12:09:19,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 299 transitions, 3795 flow [2024-06-14 12:09:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-14 12:09:19,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-14 12:09:19,436 INFO L175 Difference]: Start difference. First operand has 253 places, 289 transitions, 3174 flow. Second operand 7 states and 104 transitions. [2024-06-14 12:09:19,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 299 transitions, 3795 flow [2024-06-14 12:09:19,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 299 transitions, 3725 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:19,956 INFO L231 Difference]: Finished difference. Result has 254 places, 289 transitions, 3164 flow [2024-06-14 12:09:19,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3104, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3164, PETRI_PLACES=254, PETRI_TRANSITIONS=289} [2024-06-14 12:09:19,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 12:09:19,957 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 289 transitions, 3164 flow [2024-06-14 12:09:19,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:19,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:19,957 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 12:09:19,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:09:19,957 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:19,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2004846021, now seen corresponding path program 6 times [2024-06-14 12:09:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:19,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490220380] [2024-06-14 12:09:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:19,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:21,150 INFO 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 12:09:21,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:21,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490220380] [2024-06-14 12:09:21,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490220380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:21,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:21,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:09:21,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016287252] [2024-06-14 12:09:21,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:21,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:09:21,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:09:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:09:21,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:21,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 289 transitions, 3164 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:09:21,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:21,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:21,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:22,417 INFO L124 PetriNetUnfolderBase]: 3471/5426 cut-off events. [2024-06-14 12:09:22,418 INFO L125 PetriNetUnfolderBase]: For 536290/536304 co-relation queries the response was YES. [2024-06-14 12:09:22,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41750 conditions, 5426 events. 3471/5426 cut-off events. For 536290/536304 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30647 event pairs, 749 based on Foata normal form. 17/5432 useless extension candidates. Maximal degree in co-relation 41634. Up to 4896 conditions per place. [2024-06-14 12:09:22,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 62 changer transitions 0/322 dead transitions. [2024-06-14 12:09:22,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 322 transitions, 3856 flow [2024-06-14 12:09:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:09:22,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:09:22,478 INFO L175 Difference]: Start difference. First operand has 254 places, 289 transitions, 3164 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:09:22,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 322 transitions, 3856 flow [2024-06-14 12:09:23,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 322 transitions, 3748 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:23,114 INFO L231 Difference]: Finished difference. Result has 257 places, 289 transitions, 3186 flow [2024-06-14 12:09:23,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3056, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3186, PETRI_PLACES=257, PETRI_TRANSITIONS=289} [2024-06-14 12:09:23,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-14 12:09:23,115 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 289 transitions, 3186 flow [2024-06-14 12:09:23,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:09:23,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:23,115 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 12:09:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:09:23,116 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:23,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1864470537, now seen corresponding path program 7 times [2024-06-14 12:09:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:23,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349883288] [2024-06-14 12:09:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:24,288 INFO 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 12:09:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:24,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349883288] [2024-06-14 12:09:24,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349883288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:24,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:09:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479143896] [2024-06-14 12:09:24,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:09:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:09:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:09:24,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:24,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 289 transitions, 3186 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:09:24,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:24,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:24,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:25,720 INFO L124 PetriNetUnfolderBase]: 3449/5390 cut-off events. [2024-06-14 12:09:25,721 INFO L125 PetriNetUnfolderBase]: For 532466/532482 co-relation queries the response was YES. [2024-06-14 12:09:25,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41211 conditions, 5390 events. 3449/5390 cut-off events. For 532466/532482 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30449 event pairs, 745 based on Foata normal form. 17/5391 useless extension candidates. Maximal degree in co-relation 41094. Up to 4832 conditions per place. [2024-06-14 12:09:25,787 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 61 changer transitions 0/322 dead transitions. [2024-06-14 12:09:25,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 322 transitions, 3878 flow [2024-06-14 12:09:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:09:25,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-14 12:09:25,792 INFO L175 Difference]: Start difference. First operand has 257 places, 289 transitions, 3186 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:09:25,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 322 transitions, 3878 flow [2024-06-14 12:09:26,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 322 transitions, 3707 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:26,396 INFO L231 Difference]: Finished difference. Result has 259 places, 289 transitions, 3144 flow [2024-06-14 12:09:26,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3015, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3144, PETRI_PLACES=259, PETRI_TRANSITIONS=289} [2024-06-14 12:09:26,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-14 12:09:26,406 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 289 transitions, 3144 flow [2024-06-14 12:09:26,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 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 12:09:26,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:26,406 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 12:09:26,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:09:26,407 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:09:26,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1597845403, now seen corresponding path program 8 times [2024-06-14 12:09:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:26,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265848993] [2024-06-14 12:09:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:26,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:27,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:27,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265848993] [2024-06-14 12:09:27,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265848993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:27,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:27,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:09:27,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945507040] [2024-06-14 12:09:27,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:27,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:09:27,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:09:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:09:27,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:27,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 289 transitions, 3144 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:09:27,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:27,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:27,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:29,094 INFO L124 PetriNetUnfolderBase]: 3429/5358 cut-off events. [2024-06-14 12:09:29,094 INFO L125 PetriNetUnfolderBase]: For 526516/526532 co-relation queries the response was YES. [2024-06-14 12:09:29,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40307 conditions, 5358 events. 3429/5358 cut-off events. For 526516/526532 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 30140 event pairs, 691 based on Foata normal form. 17/5359 useless extension candidates. Maximal degree in co-relation 40189. Up to 4290 conditions per place. [2024-06-14 12:09:29,162 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 97 changer transitions 0/332 dead transitions. [2024-06-14 12:09:29,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 332 transitions, 3838 flow [2024-06-14 12:09:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:09:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:09:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:09:29,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:09:29,164 INFO L175 Difference]: Start difference. First operand has 259 places, 289 transitions, 3144 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:09:29,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 332 transitions, 3838 flow [2024-06-14 12:09:29,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 332 transitions, 3698 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:29,706 INFO L231 Difference]: Finished difference. Result has 262 places, 290 transitions, 3168 flow [2024-06-14 12:09:29,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3168, PETRI_PLACES=262, PETRI_TRANSITIONS=290} [2024-06-14 12:09:29,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 12:09:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 290 transitions, 3168 flow [2024-06-14 12:09:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 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 12:09:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:29,707 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 12:09:29,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:09:29,708 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 12:09:29,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1335209069, now seen corresponding path program 4 times [2024-06-14 12:09:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085361392] [2024-06-14 12:09:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:30,427 INFO 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 12:09:30,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:30,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085361392] [2024-06-14 12:09:30,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085361392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670208806] [2024-06-14 12:09:30,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:30,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:30,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:30,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:30,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:30,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 290 transitions, 3168 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:30,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:30,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:30,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:31,668 INFO L124 PetriNetUnfolderBase]: 3533/5470 cut-off events. [2024-06-14 12:09:31,668 INFO L125 PetriNetUnfolderBase]: For 525245/525254 co-relation queries the response was YES. [2024-06-14 12:09:31,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41286 conditions, 5470 events. 3533/5470 cut-off events. For 525245/525254 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30419 event pairs, 826 based on Foata normal form. 5/5468 useless extension candidates. Maximal degree in co-relation 41166. Up to 5326 conditions per place. [2024-06-14 12:09:31,731 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 254 selfloop transitions, 50 changer transitions 0/307 dead transitions. [2024-06-14 12:09:31,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 307 transitions, 3989 flow [2024-06-14 12:09:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:09:31,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:09:31,732 INFO L175 Difference]: Start difference. First operand has 262 places, 290 transitions, 3168 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:09:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 307 transitions, 3989 flow [2024-06-14 12:09:32,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 307 transitions, 3682 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:32,343 INFO L231 Difference]: Finished difference. Result has 263 places, 293 transitions, 3004 flow [2024-06-14 12:09:32,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3004, PETRI_PLACES=263, PETRI_TRANSITIONS=293} [2024-06-14 12:09:32,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 12:09:32,344 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 293 transitions, 3004 flow [2024-06-14 12:09:32,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:32,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:32,344 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 12:09:32,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:09:32,345 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 12:09:32,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash 504453581, now seen corresponding path program 5 times [2024-06-14 12:09:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:32,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561849559] [2024-06-14 12:09:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:32,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:33,066 INFO 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 12:09:33,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561849559] [2024-06-14 12:09:33,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561849559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:33,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:33,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:33,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320276728] [2024-06-14 12:09:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:33,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:33,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:33,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 293 transitions, 3004 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:33,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:33,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:33,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:34,280 INFO L124 PetriNetUnfolderBase]: 3543/5484 cut-off events. [2024-06-14 12:09:34,280 INFO L125 PetriNetUnfolderBase]: For 535363/535372 co-relation queries the response was YES. [2024-06-14 12:09:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40488 conditions, 5484 events. 3543/5484 cut-off events. For 535363/535372 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30478 event pairs, 826 based on Foata normal form. 5/5482 useless extension candidates. Maximal degree in co-relation 40368. Up to 5336 conditions per place. [2024-06-14 12:09:34,342 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 52 changer transitions 0/311 dead transitions. [2024-06-14 12:09:34,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 311 transitions, 3845 flow [2024-06-14 12:09:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:09:34,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:09:34,343 INFO L175 Difference]: Start difference. First operand has 263 places, 293 transitions, 3004 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:09:34,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 311 transitions, 3845 flow [2024-06-14 12:09:34,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 311 transitions, 3670 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:34,983 INFO L231 Difference]: Finished difference. Result has 264 places, 296 transitions, 2982 flow [2024-06-14 12:09:34,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2840, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2982, PETRI_PLACES=264, PETRI_TRANSITIONS=296} [2024-06-14 12:09:34,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 12:09:34,986 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 296 transitions, 2982 flow [2024-06-14 12:09:34,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:34,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:34,987 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 12:09:34,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:09:34,987 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 12:09:34,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1335197506, now seen corresponding path program 2 times [2024-06-14 12:09:34,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:34,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894155072] [2024-06-14 12:09:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:34,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:35,732 INFO 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 12:09:35,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894155072] [2024-06-14 12:09:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894155072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:35,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138752451] [2024-06-14 12:09:35,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:35,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:35,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:35,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:35,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 296 transitions, 2982 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:35,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:35,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:35,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:37,046 INFO L124 PetriNetUnfolderBase]: 3553/5496 cut-off events. [2024-06-14 12:09:37,046 INFO L125 PetriNetUnfolderBase]: For 549292/549304 co-relation queries the response was YES. [2024-06-14 12:09:37,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40755 conditions, 5496 events. 3553/5496 cut-off events. For 549292/549304 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30554 event pairs, 816 based on Foata normal form. 10/5501 useless extension candidates. Maximal degree in co-relation 40634. Up to 5414 conditions per place. [2024-06-14 12:09:37,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 37 changer transitions 0/314 dead transitions. [2024-06-14 12:09:37,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 314 transitions, 3843 flow [2024-06-14 12:09:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:09:37,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:09:37,108 INFO L175 Difference]: Start difference. First operand has 264 places, 296 transitions, 2982 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:09:37,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 314 transitions, 3843 flow [2024-06-14 12:09:37,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 314 transitions, 3735 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:37,754 INFO L231 Difference]: Finished difference. Result has 267 places, 299 transitions, 3006 flow [2024-06-14 12:09:37,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3006, PETRI_PLACES=267, PETRI_TRANSITIONS=299} [2024-06-14 12:09:37,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-14 12:09:37,755 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 299 transitions, 3006 flow [2024-06-14 12:09:37,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:37,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:37,755 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 12:09:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:09:37,755 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 12:09:37,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 517786464, now seen corresponding path program 3 times [2024-06-14 12:09:37,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:37,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651863524] [2024-06-14 12:09:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:38,508 INFO 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 12:09:38,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:38,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651863524] [2024-06-14 12:09:38,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651863524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:38,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:38,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:38,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114523447] [2024-06-14 12:09:38,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:38,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:38,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:38,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 299 transitions, 3006 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:38,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:38,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:38,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:39,713 INFO L124 PetriNetUnfolderBase]: 3563/5508 cut-off events. [2024-06-14 12:09:39,714 INFO L125 PetriNetUnfolderBase]: For 564027/564027 co-relation queries the response was YES. [2024-06-14 12:09:39,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41013 conditions, 5508 events. 3563/5508 cut-off events. For 564027/564027 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30567 event pairs, 810 based on Foata normal form. 2/5507 useless extension candidates. Maximal degree in co-relation 40891. Up to 5475 conditions per place. [2024-06-14 12:09:39,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 290 selfloop transitions, 20 changer transitions 0/313 dead transitions. [2024-06-14 12:09:39,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 313 transitions, 3712 flow [2024-06-14 12:09:39,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 12:09:39,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-14 12:09:39,771 INFO L175 Difference]: Start difference. First operand has 267 places, 299 transitions, 3006 flow. Second operand 8 states and 113 transitions. [2024-06-14 12:09:39,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 313 transitions, 3712 flow [2024-06-14 12:09:40,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 313 transitions, 3583 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:40,372 INFO L231 Difference]: Finished difference. Result has 269 places, 302 transitions, 2988 flow [2024-06-14 12:09:40,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2988, PETRI_PLACES=269, PETRI_TRANSITIONS=302} [2024-06-14 12:09:40,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 12:09:40,373 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 302 transitions, 2988 flow [2024-06-14 12:09:40,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:40,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:40,373 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 12:09:40,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:09:40,373 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 12:09:40,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash 517340994, now seen corresponding path program 4 times [2024-06-14 12:09:40,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:40,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092544978] [2024-06-14 12:09:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:40,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:41,119 INFO 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 12:09:41,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092544978] [2024-06-14 12:09:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092544978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:41,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:41,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:41,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955054332] [2024-06-14 12:09:41,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:41,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:41,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:41,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:41,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:41,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 302 transitions, 2988 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:41,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:41,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:41,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:42,434 INFO L124 PetriNetUnfolderBase]: 3557/5501 cut-off events. [2024-06-14 12:09:42,435 INFO L125 PetriNetUnfolderBase]: For 572918/572924 co-relation queries the response was YES. [2024-06-14 12:09:42,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40877 conditions, 5501 events. 3557/5501 cut-off events. For 572918/572924 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30560 event pairs, 815 based on Foata normal form. 6/5503 useless extension candidates. Maximal degree in co-relation 40754. Up to 5419 conditions per place. [2024-06-14 12:09:42,494 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 41 changer transitions 0/316 dead transitions. [2024-06-14 12:09:42,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 316 transitions, 3657 flow [2024-06-14 12:09:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:09:42,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:09:42,495 INFO L175 Difference]: Start difference. First operand has 269 places, 302 transitions, 2988 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:09:42,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 316 transitions, 3657 flow [2024-06-14 12:09:43,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 316 transitions, 3516 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 12:09:43,148 INFO L231 Difference]: Finished difference. Result has 268 places, 302 transitions, 2935 flow [2024-06-14 12:09:43,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2935, PETRI_PLACES=268, PETRI_TRANSITIONS=302} [2024-06-14 12:09:43,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 12:09:43,149 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 302 transitions, 2935 flow [2024-06-14 12:09:43,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:43,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:43,149 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 12:09:43,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:09:43,149 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 12:09:43,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:43,150 INFO L85 PathProgramCache]: Analyzing trace with hash 517340591, now seen corresponding path program 6 times [2024-06-14 12:09:43,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:43,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972142482] [2024-06-14 12:09:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:43,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:43,954 INFO 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 12:09:43,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972142482] [2024-06-14 12:09:43,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972142482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:43,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:43,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:43,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681659881] [2024-06-14 12:09:43,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:43,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:43,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:44,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:09:44,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 302 transitions, 2935 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:44,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:44,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:09:44,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:45,296 INFO L124 PetriNetUnfolderBase]: 3551/5495 cut-off events. [2024-06-14 12:09:45,296 INFO L125 PetriNetUnfolderBase]: For 581625/581628 co-relation queries the response was YES. [2024-06-14 12:09:45,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40810 conditions, 5495 events. 3551/5495 cut-off events. For 581625/581628 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30487 event pairs, 822 based on Foata normal form. 4/5493 useless extension candidates. Maximal degree in co-relation 40688. Up to 5351 conditions per place. [2024-06-14 12:09:45,349 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 55 changer transitions 0/315 dead transitions. [2024-06-14 12:09:45,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 315 transitions, 3595 flow [2024-06-14 12:09:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:09:45,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:09:45,351 INFO L175 Difference]: Start difference. First operand has 268 places, 302 transitions, 2935 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:09:45,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 315 transitions, 3595 flow [2024-06-14 12:09:45,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 315 transitions, 3466 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:45,870 INFO L231 Difference]: Finished difference. Result has 269 places, 302 transitions, 2922 flow [2024-06-14 12:09:45,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=269, PETRI_TRANSITIONS=302} [2024-06-14 12:09:45,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 12:09:45,871 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 302 transitions, 2922 flow [2024-06-14 12:09:45,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:45,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:45,871 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 12:09:45,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:09:45,871 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 12:09:45,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:45,872 INFO L85 PathProgramCache]: Analyzing trace with hash -382142812, now seen corresponding path program 1 times [2024-06-14 12:09:45,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:45,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880601251] [2024-06-14 12:09:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:45,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:46,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880601251] [2024-06-14 12:09:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880601251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:46,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:46,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:46,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621105898] [2024-06-14 12:09:46,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:46,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:47,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:47,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 302 transitions, 2922 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:47,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:47,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:48,143 INFO L124 PetriNetUnfolderBase]: 3393/5330 cut-off events. [2024-06-14 12:09:48,144 INFO L125 PetriNetUnfolderBase]: For 506709/506713 co-relation queries the response was YES. [2024-06-14 12:09:48,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37953 conditions, 5330 events. 3393/5330 cut-off events. For 506709/506713 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30378 event pairs, 739 based on Foata normal form. 1/5316 useless extension candidates. Maximal degree in co-relation 37830. Up to 5186 conditions per place. [2024-06-14 12:09:48,206 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 24 changer transitions 0/329 dead transitions. [2024-06-14 12:09:48,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 329 transitions, 3846 flow [2024-06-14 12:09:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:09:48,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 12:09:48,208 INFO L175 Difference]: Start difference. First operand has 269 places, 302 transitions, 2922 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:09:48,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 329 transitions, 3846 flow [2024-06-14 12:09:48,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 329 transitions, 3682 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 12:09:48,932 INFO L231 Difference]: Finished difference. Result has 269 places, 308 transitions, 2910 flow [2024-06-14 12:09:48,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=269, PETRI_TRANSITIONS=308} [2024-06-14 12:09:48,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-14 12:09:48,933 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 308 transitions, 2910 flow [2024-06-14 12:09:48,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:48,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:48,933 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 12:09:48,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:09:48,934 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 12:09:48,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash -385713857, now seen corresponding path program 1 times [2024-06-14 12:09:48,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:48,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145047138] [2024-06-14 12:09:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:48,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:49,849 INFO 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 12:09:49,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:49,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145047138] [2024-06-14 12:09:49,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145047138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:49,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:49,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678332677] [2024-06-14 12:09:49,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:49,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:49,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:49,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:49,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:49,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 308 transitions, 2910 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:49,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:49,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:50,992 INFO L124 PetriNetUnfolderBase]: 3408/5351 cut-off events. [2024-06-14 12:09:50,992 INFO L125 PetriNetUnfolderBase]: For 522022/522026 co-relation queries the response was YES. [2024-06-14 12:09:51,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38270 conditions, 5351 events. 3408/5351 cut-off events. For 522022/522026 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30472 event pairs, 738 based on Foata normal form. 2/5338 useless extension candidates. Maximal degree in co-relation 38147. Up to 5215 conditions per place. [2024-06-14 12:09:51,053 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 18 changer transitions 0/328 dead transitions. [2024-06-14 12:09:51,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 328 transitions, 3642 flow [2024-06-14 12:09:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:09:51,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:09:51,054 INFO L175 Difference]: Start difference. First operand has 269 places, 308 transitions, 2910 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:09:51,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 328 transitions, 3642 flow [2024-06-14 12:09:51,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 328 transitions, 3569 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:51,699 INFO L231 Difference]: Finished difference. Result has 272 places, 311 transitions, 2945 flow [2024-06-14 12:09:51,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2945, PETRI_PLACES=272, PETRI_TRANSITIONS=311} [2024-06-14 12:09:51,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 12:09:51,700 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 311 transitions, 2945 flow [2024-06-14 12:09:51,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:51,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:51,700 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 12:09:51,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:09:51,700 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 12:09:51,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:51,701 INFO L85 PathProgramCache]: Analyzing trace with hash -686086070, now seen corresponding path program 2 times [2024-06-14 12:09:51,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:51,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84569276] [2024-06-14 12:09:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:51,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:52,768 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 12:09:52,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84569276] [2024-06-14 12:09:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84569276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:52,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:52,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934476357] [2024-06-14 12:09:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:52,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:52,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 311 transitions, 2945 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:52,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:52,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:52,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:53,896 INFO L124 PetriNetUnfolderBase]: 3405/5347 cut-off events. [2024-06-14 12:09:53,896 INFO L125 PetriNetUnfolderBase]: For 528062/528066 co-relation queries the response was YES. [2024-06-14 12:09:53,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38598 conditions, 5347 events. 3405/5347 cut-off events. For 528062/528066 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 30468 event pairs, 738 based on Foata normal form. 1/5333 useless extension candidates. Maximal degree in co-relation 38473. Up to 5214 conditions per place. [2024-06-14 12:09:53,959 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 18 changer transitions 0/327 dead transitions. [2024-06-14 12:09:53,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 327 transitions, 3611 flow [2024-06-14 12:09:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:09:53,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:09:53,960 INFO L175 Difference]: Start difference. First operand has 272 places, 311 transitions, 2945 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:09:53,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 327 transitions, 3611 flow [2024-06-14 12:09:54,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 327 transitions, 3509 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:54,594 INFO L231 Difference]: Finished difference. Result has 274 places, 311 transitions, 2885 flow [2024-06-14 12:09:54,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2885, PETRI_PLACES=274, PETRI_TRANSITIONS=311} [2024-06-14 12:09:54,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-14 12:09:54,595 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 311 transitions, 2885 flow [2024-06-14 12:09:54,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:54,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:54,595 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 12:09:54,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:09:54,595 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 12:09:54,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash -381994942, now seen corresponding path program 3 times [2024-06-14 12:09:54,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:54,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005002922] [2024-06-14 12:09:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:55,628 INFO 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 12:09:55,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005002922] [2024-06-14 12:09:55,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005002922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:55,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:55,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:55,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345112609] [2024-06-14 12:09:55,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:55,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:55,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:55,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:55,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:55,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:55,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 311 transitions, 2885 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:55,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:55,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:56,667 INFO L124 PetriNetUnfolderBase]: 3410/5354 cut-off events. [2024-06-14 12:09:56,668 INFO L125 PetriNetUnfolderBase]: For 540757/540761 co-relation queries the response was YES. [2024-06-14 12:09:56,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38713 conditions, 5354 events. 3410/5354 cut-off events. For 540757/540761 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 30517 event pairs, 739 based on Foata normal form. 1/5340 useless extension candidates. Maximal degree in co-relation 38587. Up to 5206 conditions per place. [2024-06-14 12:09:56,730 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 30 changer transitions 0/327 dead transitions. [2024-06-14 12:09:56,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 327 transitions, 3595 flow [2024-06-14 12:09:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:09:56,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-14 12:09:56,731 INFO L175 Difference]: Start difference. First operand has 274 places, 311 transitions, 2885 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:09:56,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 327 transitions, 3595 flow [2024-06-14 12:09:57,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 327 transitions, 3549 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:57,530 INFO L231 Difference]: Finished difference. Result has 275 places, 314 transitions, 2963 flow [2024-06-14 12:09:57,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2963, PETRI_PLACES=275, PETRI_TRANSITIONS=314} [2024-06-14 12:09:57,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 12:09:57,530 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 314 transitions, 2963 flow [2024-06-14 12:09:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:57,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:57,531 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 12:09:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:09:57,531 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 12:09:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash -685941765, now seen corresponding path program 2 times [2024-06-14 12:09:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997729424] [2024-06-14 12:09:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:58,390 INFO 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 12:09:58,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:58,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997729424] [2024-06-14 12:09:58,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997729424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:58,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:58,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:58,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892965432] [2024-06-14 12:09:58,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:58,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:58,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:58,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:09:58,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 314 transitions, 2963 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:09:58,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:58,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:09:58,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:59,427 INFO L124 PetriNetUnfolderBase]: 3464/5431 cut-off events. [2024-06-14 12:09:59,427 INFO L125 PetriNetUnfolderBase]: For 571616/571620 co-relation queries the response was YES. [2024-06-14 12:09:59,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40351 conditions, 5431 events. 3464/5431 cut-off events. For 571616/571620 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30962 event pairs, 745 based on Foata normal form. 2/5418 useless extension candidates. Maximal degree in co-relation 40224. Up to 5215 conditions per place. [2024-06-14 12:09:59,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 46 changer transitions 0/342 dead transitions. [2024-06-14 12:09:59,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 342 transitions, 4191 flow [2024-06-14 12:09:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:09:59,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:09:59,493 INFO L175 Difference]: Start difference. First operand has 275 places, 314 transitions, 2963 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:09:59,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 342 transitions, 4191 flow [2024-06-14 12:10:00,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 342 transitions, 4089 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:00,369 INFO L231 Difference]: Finished difference. Result has 277 places, 323 transitions, 3169 flow [2024-06-14 12:10:00,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3169, PETRI_PLACES=277, PETRI_TRANSITIONS=323} [2024-06-14 12:10:00,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 12:10:00,369 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 323 transitions, 3169 flow [2024-06-14 12:10:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:00,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:00,370 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 12:10:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:10:00,370 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 12:10:00,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1528779641, now seen corresponding path program 3 times [2024-06-14 12:10:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:00,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749821139] [2024-06-14 12:10:00,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:00,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:01,221 INFO 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 12:10:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749821139] [2024-06-14 12:10:01,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749821139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:01,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:01,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329268841] [2024-06-14 12:10:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:01,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:01,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:01,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:01,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 323 transitions, 3169 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:01,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:01,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:01,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:02,335 INFO L124 PetriNetUnfolderBase]: 3433/5388 cut-off events. [2024-06-14 12:10:02,335 INFO L125 PetriNetUnfolderBase]: For 576737/576741 co-relation queries the response was YES. [2024-06-14 12:10:02,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40225 conditions, 5388 events. 3433/5388 cut-off events. For 576737/576741 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30707 event pairs, 743 based on Foata normal form. 2/5375 useless extension candidates. Maximal degree in co-relation 40097. Up to 5183 conditions per place. [2024-06-14 12:10:02,403 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 47 changer transitions 0/340 dead transitions. [2024-06-14 12:10:02,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 340 transitions, 4027 flow [2024-06-14 12:10:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:10:02,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:10:02,405 INFO L175 Difference]: Start difference. First operand has 277 places, 323 transitions, 3169 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:10:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 340 transitions, 4027 flow [2024-06-14 12:10:03,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 340 transitions, 3880 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:03,225 INFO L231 Difference]: Finished difference. Result has 282 places, 323 transitions, 3122 flow [2024-06-14 12:10:03,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3122, PETRI_PLACES=282, PETRI_TRANSITIONS=323} [2024-06-14 12:10:03,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-14 12:10:03,226 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 323 transitions, 3122 flow [2024-06-14 12:10:03,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:03,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:03,226 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 12:10:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:10:03,226 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 12:10:03,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1444462893, now seen corresponding path program 4 times [2024-06-14 12:10:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:03,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140219665] [2024-06-14 12:10:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:04,087 INFO 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 12:10:04,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:04,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140219665] [2024-06-14 12:10:04,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140219665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:04,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:04,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:04,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149300404] [2024-06-14 12:10:04,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:04,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:04,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:04,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:04,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 323 transitions, 3122 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:04,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:04,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:04,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:05,226 INFO L124 PetriNetUnfolderBase]: 3481/5458 cut-off events. [2024-06-14 12:10:05,226 INFO L125 PetriNetUnfolderBase]: For 601946/601950 co-relation queries the response was YES. [2024-06-14 12:10:05,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41252 conditions, 5458 events. 3481/5458 cut-off events. For 601946/601950 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31159 event pairs, 746 based on Foata normal form. 2/5445 useless extension candidates. Maximal degree in co-relation 41122. Up to 5288 conditions per place. [2024-06-14 12:10:05,284 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 297 selfloop transitions, 33 changer transitions 0/344 dead transitions. [2024-06-14 12:10:05,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 344 transitions, 4302 flow [2024-06-14 12:10:05,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:05,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 12:10:05,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-14 12:10:05,287 INFO L175 Difference]: Start difference. First operand has 282 places, 323 transitions, 3122 flow. Second operand 9 states and 136 transitions. [2024-06-14 12:10:05,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 344 transitions, 4302 flow [2024-06-14 12:10:06,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 344 transitions, 4188 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:06,022 INFO L231 Difference]: Finished difference. Result has 284 places, 329 transitions, 3236 flow [2024-06-14 12:10:06,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3020, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3236, PETRI_PLACES=284, PETRI_TRANSITIONS=329} [2024-06-14 12:10:06,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 12:10:06,023 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 329 transitions, 3236 flow [2024-06-14 12:10:06,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:06,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:06,024 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 12:10:06,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:10:06,024 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 12:10:06,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1329483586, now seen corresponding path program 4 times [2024-06-14 12:10:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:06,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063466081] [2024-06-14 12:10:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:06,935 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 12:10:06,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063466081] [2024-06-14 12:10:06,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063466081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:06,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:06,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:06,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836210102] [2024-06-14 12:10:06,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:06,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:06,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:06,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:07,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:07,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 329 transitions, 3236 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:07,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:07,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:07,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:08,186 INFO L124 PetriNetUnfolderBase]: 3456/5422 cut-off events. [2024-06-14 12:10:08,187 INFO L125 PetriNetUnfolderBase]: For 604659/604663 co-relation queries the response was YES. [2024-06-14 12:10:08,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40881 conditions, 5422 events. 3456/5422 cut-off events. For 604659/604663 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30979 event pairs, 746 based on Foata normal form. 1/5408 useless extension candidates. Maximal degree in co-relation 40750. Up to 5299 conditions per place. [2024-06-14 12:10:08,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 18 changer transitions 0/342 dead transitions. [2024-06-14 12:10:08,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 342 transitions, 3976 flow [2024-06-14 12:10:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:10:08,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-14 12:10:08,243 INFO L175 Difference]: Start difference. First operand has 284 places, 329 transitions, 3236 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:10:08,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 342 transitions, 3976 flow [2024-06-14 12:10:09,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 342 transitions, 3840 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:09,112 INFO L231 Difference]: Finished difference. Result has 286 places, 332 transitions, 3208 flow [2024-06-14 12:10:09,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3100, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3208, PETRI_PLACES=286, PETRI_TRANSITIONS=332} [2024-06-14 12:10:09,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 12:10:09,113 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 332 transitions, 3208 flow [2024-06-14 12:10:09,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:09,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:09,113 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 12:10:09,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:10:09,114 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 12:10:09,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:09,114 INFO L85 PathProgramCache]: Analyzing trace with hash 517525289, now seen corresponding path program 5 times [2024-06-14 12:10:09,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:09,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923725485] [2024-06-14 12:10:09,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:09,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:09,906 INFO 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 12:10:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:09,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923725485] [2024-06-14 12:10:09,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923725485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:09,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:09,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:09,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637230135] [2024-06-14 12:10:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:09,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:10,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:10,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 332 transitions, 3208 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:10,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:10,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:10,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:11,063 INFO L124 PetriNetUnfolderBase]: 3458/5424 cut-off events. [2024-06-14 12:10:11,064 INFO L125 PetriNetUnfolderBase]: For 617396/617400 co-relation queries the response was YES. [2024-06-14 12:10:11,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41094 conditions, 5424 events. 3458/5424 cut-off events. For 617396/617400 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30949 event pairs, 743 based on Foata normal form. 3/5412 useless extension candidates. Maximal degree in co-relation 40962. Up to 5287 conditions per place. [2024-06-14 12:10:11,132 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 20 changer transitions 0/344 dead transitions. [2024-06-14 12:10:11,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 344 transitions, 3900 flow [2024-06-14 12:10:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 12:10:11,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 12:10:11,133 INFO L175 Difference]: Start difference. First operand has 286 places, 332 transitions, 3208 flow. Second operand 8 states and 120 transitions. [2024-06-14 12:10:11,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 344 transitions, 3900 flow [2024-06-14 12:10:12,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 344 transitions, 3766 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:12,129 INFO L231 Difference]: Finished difference. Result has 288 places, 332 transitions, 3120 flow [2024-06-14 12:10:12,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3120, PETRI_PLACES=288, PETRI_TRANSITIONS=332} [2024-06-14 12:10:12,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-14 12:10:12,130 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 332 transitions, 3120 flow [2024-06-14 12:10:12,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:12,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:12,130 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 12:10:12,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:10:12,131 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 12:10:12,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 510168059, now seen corresponding path program 6 times [2024-06-14 12:10:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:12,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758029260] [2024-06-14 12:10:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:12,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:12,962 INFO 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 12:10:12,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:12,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758029260] [2024-06-14 12:10:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758029260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:12,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:12,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311369238] [2024-06-14 12:10:12,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:13,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:13,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 332 transitions, 3120 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:13,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:13,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:13,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:14,116 INFO L124 PetriNetUnfolderBase]: 3452/5416 cut-off events. [2024-06-14 12:10:14,117 INFO L125 PetriNetUnfolderBase]: For 617402/617406 co-relation queries the response was YES. [2024-06-14 12:10:14,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40870 conditions, 5416 events. 3452/5416 cut-off events. For 617402/617406 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30839 event pairs, 740 based on Foata normal form. 2/5403 useless extension candidates. Maximal degree in co-relation 40737. Up to 5253 conditions per place. [2024-06-14 12:10:14,182 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 33 changer transitions 0/345 dead transitions. [2024-06-14 12:10:14,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 345 transitions, 3818 flow [2024-06-14 12:10:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:10:14,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:10:14,184 INFO L175 Difference]: Start difference. First operand has 288 places, 332 transitions, 3120 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:10:14,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 345 transitions, 3818 flow [2024-06-14 12:10:15,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 345 transitions, 3711 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:15,146 INFO L231 Difference]: Finished difference. Result has 289 places, 332 transitions, 3085 flow [2024-06-14 12:10:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3085, PETRI_PLACES=289, PETRI_TRANSITIONS=332} [2024-06-14 12:10:15,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-14 12:10:15,146 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 332 transitions, 3085 flow [2024-06-14 12:10:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 12:10:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:15,147 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 12:10:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:10:15,147 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 12:10:15,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:15,147 INFO L85 PathProgramCache]: Analyzing trace with hash 517802336, now seen corresponding path program 1 times [2024-06-14 12:10:15,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:15,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391628439] [2024-06-14 12:10:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:16,151 INFO 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 12:10:16,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391628439] [2024-06-14 12:10:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391628439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:16,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:16,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:16,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105265875] [2024-06-14 12:10:16,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:16,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:16,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:16,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:16,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:16,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:16,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 332 transitions, 3085 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:16,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:16,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:16,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:17,377 INFO L124 PetriNetUnfolderBase]: 3632/5606 cut-off events. [2024-06-14 12:10:17,377 INFO L125 PetriNetUnfolderBase]: For 736702/736702 co-relation queries the response was YES. [2024-06-14 12:10:17,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44336 conditions, 5606 events. 3632/5606 cut-off events. For 736702/736702 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 31010 event pairs, 814 based on Foata normal form. 2/5605 useless extension candidates. Maximal degree in co-relation 44202. Up to 5575 conditions per place. [2024-06-14 12:10:17,446 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 323 selfloop transitions, 19 changer transitions 0/345 dead transitions. [2024-06-14 12:10:17,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 345 transitions, 3851 flow [2024-06-14 12:10:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:17,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-14 12:10:17,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 12:10:17,447 INFO L175 Difference]: Start difference. First operand has 289 places, 332 transitions, 3085 flow. Second operand 8 states and 112 transitions. [2024-06-14 12:10:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 345 transitions, 3851 flow [2024-06-14 12:10:18,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 345 transitions, 3777 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:18,375 INFO L231 Difference]: Finished difference. Result has 290 places, 334 transitions, 3114 flow [2024-06-14 12:10:18,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3114, PETRI_PLACES=290, PETRI_TRANSITIONS=334} [2024-06-14 12:10:18,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-14 12:10:18,376 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 334 transitions, 3114 flow [2024-06-14 12:10:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:18,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:18,376 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 12:10:18,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:10:18,377 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 12:10:18,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:18,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1199605016, now seen corresponding path program 1 times [2024-06-14 12:10:18,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:18,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858472971] [2024-06-14 12:10:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:18,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:19,154 INFO 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 12:10:19,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858472971] [2024-06-14 12:10:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858472971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:19,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:19,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:19,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953218376] [2024-06-14 12:10:19,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:19,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:19,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:19,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 334 transitions, 3114 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:19,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:19,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:20,327 INFO L124 PetriNetUnfolderBase]: 3658/5642 cut-off events. [2024-06-14 12:10:20,327 INFO L125 PetriNetUnfolderBase]: For 760567/760567 co-relation queries the response was YES. [2024-06-14 12:10:20,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45054 conditions, 5642 events. 3658/5642 cut-off events. For 760567/760567 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31231 event pairs, 808 based on Foata normal form. 2/5641 useless extension candidates. Maximal degree in co-relation 44919. Up to 5516 conditions per place. [2024-06-14 12:10:20,399 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 46 changer transitions 0/375 dead transitions. [2024-06-14 12:10:20,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 375 transitions, 4264 flow [2024-06-14 12:10:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:10:20,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:10:20,400 INFO L175 Difference]: Start difference. First operand has 290 places, 334 transitions, 3114 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:10:20,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 375 transitions, 4264 flow [2024-06-14 12:10:21,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 375 transitions, 4177 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:21,419 INFO L231 Difference]: Finished difference. Result has 294 places, 348 transitions, 3314 flow [2024-06-14 12:10:21,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3314, PETRI_PLACES=294, PETRI_TRANSITIONS=348} [2024-06-14 12:10:21,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 12:10:21,420 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 348 transitions, 3314 flow [2024-06-14 12:10:21,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:21,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:21,420 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 12:10:21,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:10:21,421 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 12:10:21,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1359547872, now seen corresponding path program 2 times [2024-06-14 12:10:21,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:21,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857787333] [2024-06-14 12:10:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:21,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:22,143 INFO 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 12:10:22,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857787333] [2024-06-14 12:10:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857787333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:22,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:22,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567396281] [2024-06-14 12:10:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:22,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:22,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:22,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 348 transitions, 3314 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:22,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:22,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:22,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:23,436 INFO L124 PetriNetUnfolderBase]: 3668/5656 cut-off events. [2024-06-14 12:10:23,436 INFO L125 PetriNetUnfolderBase]: For 780690/780690 co-relation queries the response was YES. [2024-06-14 12:10:23,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46171 conditions, 5656 events. 3668/5656 cut-off events. For 780690/780690 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31349 event pairs, 813 based on Foata normal form. 2/5655 useless extension candidates. Maximal degree in co-relation 46033. Up to 5563 conditions per place. [2024-06-14 12:10:23,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 42 changer transitions 0/374 dead transitions. [2024-06-14 12:10:23,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 374 transitions, 4189 flow [2024-06-14 12:10:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:10:23,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:10:23,503 INFO L175 Difference]: Start difference. First operand has 294 places, 348 transitions, 3314 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:10:23,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 374 transitions, 4189 flow [2024-06-14 12:10:24,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 374 transitions, 4070 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-14 12:10:24,525 INFO L231 Difference]: Finished difference. Result has 300 places, 352 transitions, 3361 flow [2024-06-14 12:10:24,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3361, PETRI_PLACES=300, PETRI_TRANSITIONS=352} [2024-06-14 12:10:24,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-14 12:10:24,526 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 352 transitions, 3361 flow [2024-06-14 12:10:24,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:24,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:24,526 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 12:10:24,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:10:24,527 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 12:10:24,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:24,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1312980116, now seen corresponding path program 1 times [2024-06-14 12:10:24,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:24,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920370588] [2024-06-14 12:10:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:24,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:25,498 INFO 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 12:10:25,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920370588] [2024-06-14 12:10:25,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920370588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:25,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:25,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:25,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224563939] [2024-06-14 12:10:25,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:25,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:25,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:25,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:25,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:25,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 352 transitions, 3361 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:25,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:25,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:25,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:26,901 INFO L124 PetriNetUnfolderBase]: 3676/5668 cut-off events. [2024-06-14 12:10:26,901 INFO L125 PetriNetUnfolderBase]: For 797345/797345 co-relation queries the response was YES. [2024-06-14 12:10:26,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46095 conditions, 5668 events. 3676/5668 cut-off events. For 797345/797345 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31289 event pairs, 679 based on Foata normal form. 2/5667 useless extension candidates. Maximal degree in co-relation 45955. Up to 5530 conditions per place. [2024-06-14 12:10:26,966 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 339 selfloop transitions, 41 changer transitions 0/383 dead transitions. [2024-06-14 12:10:26,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 383 transitions, 4470 flow [2024-06-14 12:10:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:10:26,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:10:26,968 INFO L175 Difference]: Start difference. First operand has 300 places, 352 transitions, 3361 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:10:26,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 383 transitions, 4470 flow [2024-06-14 12:10:27,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 383 transitions, 4374 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:27,994 INFO L231 Difference]: Finished difference. Result has 303 places, 356 transitions, 3456 flow [2024-06-14 12:10:27,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3456, PETRI_PLACES=303, PETRI_TRANSITIONS=356} [2024-06-14 12:10:27,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 12:10:27,994 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 356 transitions, 3456 flow [2024-06-14 12:10:27,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:27,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:27,995 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 12:10:27,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:10:27,995 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 12:10:27,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1189071842, now seen corresponding path program 2 times [2024-06-14 12:10:27,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:27,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454956660] [2024-06-14 12:10:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:27,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:29,066 INFO 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 12:10:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:29,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454956660] [2024-06-14 12:10:29,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454956660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:29,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:29,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:29,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129704665] [2024-06-14 12:10:29,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:29,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:29,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:29,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:29,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:29,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 356 transitions, 3456 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:29,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:29,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:29,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:30,511 INFO L124 PetriNetUnfolderBase]: 3684/5680 cut-off events. [2024-06-14 12:10:30,511 INFO L125 PetriNetUnfolderBase]: For 816630/816630 co-relation queries the response was YES. [2024-06-14 12:10:30,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46546 conditions, 5680 events. 3684/5680 cut-off events. For 816630/816630 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31482 event pairs, 811 based on Foata normal form. 2/5679 useless extension candidates. Maximal degree in co-relation 46405. Up to 5587 conditions per place. [2024-06-14 12:10:30,579 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 338 selfloop transitions, 39 changer transitions 0/380 dead transitions. [2024-06-14 12:10:30,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 380 transitions, 4325 flow [2024-06-14 12:10:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:10:30,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:10:30,581 INFO L175 Difference]: Start difference. First operand has 303 places, 356 transitions, 3456 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:10:30,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 380 transitions, 4325 flow [2024-06-14 12:10:31,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 380 transitions, 4189 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:31,529 INFO L231 Difference]: Finished difference. Result has 307 places, 358 transitions, 3461 flow [2024-06-14 12:10:31,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3461, PETRI_PLACES=307, PETRI_TRANSITIONS=358} [2024-06-14 12:10:31,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-14 12:10:31,530 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 358 transitions, 3461 flow [2024-06-14 12:10:31,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:31,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:31,530 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 12:10:31,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:10:31,531 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 12:10:31,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:31,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1321561908, now seen corresponding path program 1 times [2024-06-14 12:10:31,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:31,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274048034] [2024-06-14 12:10:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:31,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:32,359 INFO 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 12:10:32,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:32,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274048034] [2024-06-14 12:10:32,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274048034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:32,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:32,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:32,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203756352] [2024-06-14 12:10:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:32,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:32,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:32,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 358 transitions, 3461 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:32,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:32,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:32,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:33,801 INFO L124 PetriNetUnfolderBase]: 3704/5708 cut-off events. [2024-06-14 12:10:33,802 INFO L125 PetriNetUnfolderBase]: For 842813/842813 co-relation queries the response was YES. [2024-06-14 12:10:33,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46846 conditions, 5708 events. 3704/5708 cut-off events. For 842813/842813 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31668 event pairs, 818 based on Foata normal form. 4/5709 useless extension candidates. Maximal degree in co-relation 46703. Up to 5463 conditions per place. [2024-06-14 12:10:33,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 74 changer transitions 0/393 dead transitions. [2024-06-14 12:10:33,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 393 transitions, 4616 flow [2024-06-14 12:10:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:10:33,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:10:33,871 INFO L175 Difference]: Start difference. First operand has 307 places, 358 transitions, 3461 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:10:33,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 393 transitions, 4616 flow [2024-06-14 12:10:34,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 393 transitions, 4519 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:34,928 INFO L231 Difference]: Finished difference. Result has 310 places, 364 transitions, 3632 flow [2024-06-14 12:10:34,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3632, PETRI_PLACES=310, PETRI_TRANSITIONS=364} [2024-06-14 12:10:34,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-14 12:10:34,928 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 364 transitions, 3632 flow [2024-06-14 12:10:34,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:34,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:34,929 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 12:10:34,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:10:34,929 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 12:10:34,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2115716732, now seen corresponding path program 1 times [2024-06-14 12:10:34,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:34,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631478953] [2024-06-14 12:10:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:34,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:35,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:35,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631478953] [2024-06-14 12:10:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631478953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:35,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103225588] [2024-06-14 12:10:35,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:35,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:35,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:35,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 364 transitions, 3632 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:35,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:35,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:35,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:37,056 INFO L124 PetriNetUnfolderBase]: 3709/5715 cut-off events. [2024-06-14 12:10:37,057 INFO L125 PetriNetUnfolderBase]: For 850654/850654 co-relation queries the response was YES. [2024-06-14 12:10:37,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47579 conditions, 5715 events. 3709/5715 cut-off events. For 850654/850654 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31674 event pairs, 813 based on Foata normal form. 1/5713 useless extension candidates. Maximal degree in co-relation 47435. Up to 5666 conditions per place. [2024-06-14 12:10:37,126 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 18 changer transitions 0/389 dead transitions. [2024-06-14 12:10:37,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 389 transitions, 4545 flow [2024-06-14 12:10:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:10:37,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:10:37,127 INFO L175 Difference]: Start difference. First operand has 310 places, 364 transitions, 3632 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:10:37,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 389 transitions, 4545 flow [2024-06-14 12:10:38,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 389 transitions, 4428 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:38,221 INFO L231 Difference]: Finished difference. Result has 313 places, 367 transitions, 3643 flow [2024-06-14 12:10:38,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3643, PETRI_PLACES=313, PETRI_TRANSITIONS=367} [2024-06-14 12:10:38,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 12:10:38,222 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 367 transitions, 3643 flow [2024-06-14 12:10:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:38,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:38,223 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 12:10:38,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:10:38,223 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 12:10:38,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1431131222, now seen corresponding path program 3 times [2024-06-14 12:10:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078030205] [2024-06-14 12:10:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:38,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:39,013 INFO 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 12:10:39,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:39,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078030205] [2024-06-14 12:10:39,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078030205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:39,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:39,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:39,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087504400] [2024-06-14 12:10:39,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:39,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:39,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:39,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:39,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:39,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:39,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 367 transitions, 3643 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:39,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:39,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:40,210 INFO L124 PetriNetUnfolderBase]: 3743/5762 cut-off events. [2024-06-14 12:10:40,211 INFO L125 PetriNetUnfolderBase]: For 885726/885726 co-relation queries the response was YES. [2024-06-14 12:10:40,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48604 conditions, 5762 events. 3743/5762 cut-off events. For 885726/885726 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32017 event pairs, 807 based on Foata normal form. 2/5761 useless extension candidates. Maximal degree in co-relation 48458. Up to 5556 conditions per place. [2024-06-14 12:10:40,290 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 68 changer transitions 0/402 dead transitions. [2024-06-14 12:10:40,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 402 transitions, 5071 flow [2024-06-14 12:10:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:10:40,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-14 12:10:40,292 INFO L175 Difference]: Start difference. First operand has 313 places, 367 transitions, 3643 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:10:40,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 402 transitions, 5071 flow [2024-06-14 12:10:41,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 402 transitions, 4965 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:41,542 INFO L231 Difference]: Finished difference. Result has 315 places, 376 transitions, 3877 flow [2024-06-14 12:10:41,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3537, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3877, PETRI_PLACES=315, PETRI_TRANSITIONS=376} [2024-06-14 12:10:41,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-14 12:10:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 376 transitions, 3877 flow [2024-06-14 12:10:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:41,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:41,543 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 12:10:41,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:10:41,543 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 12:10:41,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash 915262338, now seen corresponding path program 2 times [2024-06-14 12:10:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:41,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236177677] [2024-06-14 12:10:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:41,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:42,310 INFO 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 12:10:42,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:42,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236177677] [2024-06-14 12:10:42,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236177677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:42,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:42,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:42,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935369660] [2024-06-14 12:10:42,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:42,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:42,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:42,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 376 transitions, 3877 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:42,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:42,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:42,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:43,591 INFO L124 PetriNetUnfolderBase]: 3756/5780 cut-off events. [2024-06-14 12:10:43,591 INFO L125 PetriNetUnfolderBase]: For 909098/909098 co-relation queries the response was YES. [2024-06-14 12:10:43,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49617 conditions, 5780 events. 3756/5780 cut-off events. For 909098/909098 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 32108 event pairs, 820 based on Foata normal form. 1/5778 useless extension candidates. Maximal degree in co-relation 49470. Up to 5704 conditions per place. [2024-06-14 12:10:43,671 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 37 changer transitions 0/402 dead transitions. [2024-06-14 12:10:43,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 402 transitions, 5092 flow [2024-06-14 12:10:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:43,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:10:43,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:10:43,672 INFO L175 Difference]: Start difference. First operand has 315 places, 376 transitions, 3877 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:10:43,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 402 transitions, 5092 flow [2024-06-14 12:10:44,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 402 transitions, 4912 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:44,887 INFO L231 Difference]: Finished difference. Result has 318 places, 382 transitions, 3959 flow [2024-06-14 12:10:44,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3697, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3959, PETRI_PLACES=318, PETRI_TRANSITIONS=382} [2024-06-14 12:10:44,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-14 12:10:44,888 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 382 transitions, 3959 flow [2024-06-14 12:10:44,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:44,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:44,888 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 12:10:44,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:10:44,888 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 12:10:44,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash 915262152, now seen corresponding path program 4 times [2024-06-14 12:10:44,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:44,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688973267] [2024-06-14 12:10:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:45,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:45,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688973267] [2024-06-14 12:10:45,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688973267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:45,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:45,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457775108] [2024-06-14 12:10:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:45,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:45,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:45,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 382 transitions, 3959 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:45,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:45,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:45,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:46,923 INFO L124 PetriNetUnfolderBase]: 3774/5805 cut-off events. [2024-06-14 12:10:46,924 INFO L125 PetriNetUnfolderBase]: For 937702/937702 co-relation queries the response was YES. [2024-06-14 12:10:46,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50100 conditions, 5805 events. 3774/5805 cut-off events. For 937702/937702 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32251 event pairs, 805 based on Foata normal form. 2/5804 useless extension candidates. Maximal degree in co-relation 49953. Up to 5593 conditions per place. [2024-06-14 12:10:47,003 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 74 changer transitions 0/411 dead transitions. [2024-06-14 12:10:47,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 411 transitions, 5283 flow [2024-06-14 12:10:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:10:47,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-14 12:10:47,004 INFO L175 Difference]: Start difference. First operand has 318 places, 382 transitions, 3959 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:10:47,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 411 transitions, 5283 flow [2024-06-14 12:10:48,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 411 transitions, 5149 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:48,654 INFO L231 Difference]: Finished difference. Result has 322 places, 388 transitions, 4049 flow [2024-06-14 12:10:48,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4049, PETRI_PLACES=322, PETRI_TRANSITIONS=388} [2024-06-14 12:10:48,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-14 12:10:48,655 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 388 transitions, 4049 flow [2024-06-14 12:10:48,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:48,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:48,655 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 12:10:48,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:10:48,655 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 12:10:48,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1431430124, now seen corresponding path program 1 times [2024-06-14 12:10:48,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:48,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364664532] [2024-06-14 12:10:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:49,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364664532] [2024-06-14 12:10:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364664532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:49,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:49,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:49,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747220489] [2024-06-14 12:10:49,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:49,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:49,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:49,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:49,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:49,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 388 transitions, 4049 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:49,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:49,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:49,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:50,629 INFO L124 PetriNetUnfolderBase]: 3787/5823 cut-off events. [2024-06-14 12:10:50,630 INFO L125 PetriNetUnfolderBase]: For 957082/957082 co-relation queries the response was YES. [2024-06-14 12:10:50,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50671 conditions, 5823 events. 3787/5823 cut-off events. For 957082/957082 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32383 event pairs, 820 based on Foata normal form. 1/5821 useless extension candidates. Maximal degree in co-relation 50522. Up to 5741 conditions per place. [2024-06-14 12:10:50,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-14 12:10:50,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 414 transitions, 5224 flow [2024-06-14 12:10:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:10:50,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:10:50,712 INFO L175 Difference]: Start difference. First operand has 322 places, 388 transitions, 4049 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:10:50,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 414 transitions, 5224 flow [2024-06-14 12:10:52,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 414 transitions, 5112 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:52,533 INFO L231 Difference]: Finished difference. Result has 326 places, 394 transitions, 4139 flow [2024-06-14 12:10:52,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4139, PETRI_PLACES=326, PETRI_TRANSITIONS=394} [2024-06-14 12:10:52,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-14 12:10:52,534 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 394 transitions, 4139 flow [2024-06-14 12:10:52,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:52,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:52,535 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 12:10:52,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:10:52,535 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 12:10:52,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1092631194, now seen corresponding path program 2 times [2024-06-14 12:10:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:52,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309565250] [2024-06-14 12:10:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:53,327 INFO 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 12:10:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309565250] [2024-06-14 12:10:53,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309565250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:53,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:53,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093884681] [2024-06-14 12:10:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:53,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:53,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 394 transitions, 4139 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:53,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:53,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:53,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:54,642 INFO L124 PetriNetUnfolderBase]: 3792/5830 cut-off events. [2024-06-14 12:10:54,643 INFO L125 PetriNetUnfolderBase]: For 978079/978079 co-relation queries the response was YES. [2024-06-14 12:10:54,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51118 conditions, 5830 events. 3792/5830 cut-off events. For 978079/978079 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32429 event pairs, 820 based on Foata normal form. 1/5828 useless extension candidates. Maximal degree in co-relation 50968. Up to 5778 conditions per place. [2024-06-14 12:10:54,722 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 30 changer transitions 0/413 dead transitions. [2024-06-14 12:10:54,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 413 transitions, 5064 flow [2024-06-14 12:10:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:10:54,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:10:54,726 INFO L175 Difference]: Start difference. First operand has 326 places, 394 transitions, 4139 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:10:54,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 413 transitions, 5064 flow [2024-06-14 12:10:56,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 413 transitions, 4934 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:56,413 INFO L231 Difference]: Finished difference. Result has 330 places, 397 transitions, 4141 flow [2024-06-14 12:10:56,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4141, PETRI_PLACES=330, PETRI_TRANSITIONS=397} [2024-06-14 12:10:56,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-14 12:10:56,414 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 397 transitions, 4141 flow [2024-06-14 12:10:56,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:56,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:56,414 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 12:10:56,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:10:56,414 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 12:10:56,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:56,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1608441302, now seen corresponding path program 5 times [2024-06-14 12:10:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:56,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070549920] [2024-06-14 12:10:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:57,174 INFO 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 12:10:57,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070549920] [2024-06-14 12:10:57,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070549920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:57,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:57,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784098846] [2024-06-14 12:10:57,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:57,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:10:57,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 397 transitions, 4141 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:57,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:57,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:10:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:58,539 INFO L124 PetriNetUnfolderBase]: 3802/5844 cut-off events. [2024-06-14 12:10:58,539 INFO L125 PetriNetUnfolderBase]: For 1002085/1002085 co-relation queries the response was YES. [2024-06-14 12:10:58,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51383 conditions, 5844 events. 3802/5844 cut-off events. For 1002085/1002085 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 32492 event pairs, 821 based on Foata normal form. 2/5843 useless extension candidates. Maximal degree in co-relation 51231. Up to 5751 conditions per place. [2024-06-14 12:10:58,623 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 40 changer transitions 0/417 dead transitions. [2024-06-14 12:10:58,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 417 transitions, 5064 flow [2024-06-14 12:10:58,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:10:58,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:10:58,625 INFO L175 Difference]: Start difference. First operand has 330 places, 397 transitions, 4141 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:10:58,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 417 transitions, 5064 flow [2024-06-14 12:11:00,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 417 transitions, 4984 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:00,515 INFO L231 Difference]: Finished difference. Result has 333 places, 401 transitions, 4212 flow [2024-06-14 12:11:00,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4212, PETRI_PLACES=333, PETRI_TRANSITIONS=401} [2024-06-14 12:11:00,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-14 12:11:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 401 transitions, 4212 flow [2024-06-14 12:11:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:00,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:00,516 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 12:11:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:11:00,517 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 12:11:00,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1092393858, now seen corresponding path program 3 times [2024-06-14 12:11:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22936449] [2024-06-14 12:11:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:01,286 INFO 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 12:11:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:01,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22936449] [2024-06-14 12:11:01,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22936449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:01,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:01,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106919160] [2024-06-14 12:11:01,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:01,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:01,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 401 transitions, 4212 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:01,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:01,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:01,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:02,611 INFO L124 PetriNetUnfolderBase]: 3807/5851 cut-off events. [2024-06-14 12:11:02,611 INFO L125 PetriNetUnfolderBase]: For 1017429/1017429 co-relation queries the response was YES. [2024-06-14 12:11:02,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51704 conditions, 5851 events. 3807/5851 cut-off events. For 1017429/1017429 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32553 event pairs, 819 based on Foata normal form. 1/5849 useless extension candidates. Maximal degree in co-relation 51550. Up to 5808 conditions per place. [2024-06-14 12:11:02,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 394 selfloop transitions, 23 changer transitions 0/420 dead transitions. [2024-06-14 12:11:02,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 5161 flow [2024-06-14 12:11:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:11:02,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:11:02,692 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 4212 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:11:02,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 5161 flow [2024-06-14 12:11:04,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 420 transitions, 5080 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:04,468 INFO L231 Difference]: Finished difference. Result has 337 places, 404 transitions, 4259 flow [2024-06-14 12:11:04,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4131, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4259, PETRI_PLACES=337, PETRI_TRANSITIONS=404} [2024-06-14 12:11:04,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-14 12:11:04,469 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 404 transitions, 4259 flow [2024-06-14 12:11:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:04,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:04,469 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 12:11:04,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:11:04,469 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 12:11:04,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:04,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1608561272, now seen corresponding path program 6 times [2024-06-14 12:11:04,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:04,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367759209] [2024-06-14 12:11:04,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:05,259 INFO 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 12:11:05,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367759209] [2024-06-14 12:11:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367759209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:05,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031773363] [2024-06-14 12:11:05,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:05,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:05,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 404 transitions, 4259 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:05,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:05,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:05,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:06,699 INFO L124 PetriNetUnfolderBase]: 3825/5876 cut-off events. [2024-06-14 12:11:06,699 INFO L125 PetriNetUnfolderBase]: For 1046938/1046938 co-relation queries the response was YES. [2024-06-14 12:11:06,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52096 conditions, 5876 events. 3825/5876 cut-off events. For 1046938/1046938 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32705 event pairs, 819 based on Foata normal form. 2/5875 useless extension candidates. Maximal degree in co-relation 51941. Up to 5762 conditions per place. [2024-06-14 12:11:06,773 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 50 changer transitions 0/428 dead transitions. [2024-06-14 12:11:06,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 428 transitions, 5431 flow [2024-06-14 12:11:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:11:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:11:06,781 INFO L175 Difference]: Start difference. First operand has 337 places, 404 transitions, 4259 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:11:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 428 transitions, 5431 flow [2024-06-14 12:11:08,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 428 transitions, 5331 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:08,762 INFO L231 Difference]: Finished difference. Result has 340 places, 410 transitions, 4370 flow [2024-06-14 12:11:08,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4370, PETRI_PLACES=340, PETRI_TRANSITIONS=410} [2024-06-14 12:11:08,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 12:11:08,762 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 410 transitions, 4370 flow [2024-06-14 12:11:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:08,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:08,763 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 12:11:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:11:08,763 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 12:11:08,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1608561644, now seen corresponding path program 3 times [2024-06-14 12:11:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:08,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847465322] [2024-06-14 12:11:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:09,498 INFO 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 12:11:09,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:09,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847465322] [2024-06-14 12:11:09,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847465322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:09,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:09,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:09,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399186472] [2024-06-14 12:11:09,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:09,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:09,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:09,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:09,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:09,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 410 transitions, 4370 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:09,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:09,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:09,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:10,910 INFO L124 PetriNetUnfolderBase]: 3830/5883 cut-off events. [2024-06-14 12:11:10,911 INFO L125 PetriNetUnfolderBase]: For 1062329/1062329 co-relation queries the response was YES. [2024-06-14 12:11:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52437 conditions, 5883 events. 3830/5883 cut-off events. For 1062329/1062329 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 32725 event pairs, 820 based on Foata normal form. 1/5881 useless extension candidates. Maximal degree in co-relation 52280. Up to 5825 conditions per place. [2024-06-14 12:11:11,000 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 35 changer transitions 0/429 dead transitions. [2024-06-14 12:11:11,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 429 transitions, 5309 flow [2024-06-14 12:11:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:11:11,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:11:11,002 INFO L175 Difference]: Start difference. First operand has 340 places, 410 transitions, 4370 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:11:11,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 429 transitions, 5309 flow [2024-06-14 12:11:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 429 transitions, 5208 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:13,104 INFO L231 Difference]: Finished difference. Result has 343 places, 413 transitions, 4393 flow [2024-06-14 12:11:13,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4393, PETRI_PLACES=343, PETRI_TRANSITIONS=413} [2024-06-14 12:11:13,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-14 12:11:13,104 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 413 transitions, 4393 flow [2024-06-14 12:11:13,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:13,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:13,105 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 12:11:13,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:11:13,105 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 12:11:13,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:13,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1608438326, now seen corresponding path program 3 times [2024-06-14 12:11:13,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:13,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322045327] [2024-06-14 12:11:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:13,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:14,196 INFO 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 12:11:14,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:14,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322045327] [2024-06-14 12:11:14,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322045327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:14,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:14,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:14,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769111368] [2024-06-14 12:11:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:14,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:14,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:14,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 413 transitions, 4393 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:14,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:14,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:14,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:15,712 INFO L124 PetriNetUnfolderBase]: 3838/5895 cut-off events. [2024-06-14 12:11:15,713 INFO L125 PetriNetUnfolderBase]: For 1087913/1087913 co-relation queries the response was YES. [2024-06-14 12:11:15,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52667 conditions, 5895 events. 3838/5895 cut-off events. For 1087913/1087913 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32848 event pairs, 821 based on Foata normal form. 2/5894 useless extension candidates. Maximal degree in co-relation 52509. Up to 5802 conditions per place. [2024-06-14 12:11:15,801 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 390 selfloop transitions, 38 changer transitions 0/431 dead transitions. [2024-06-14 12:11:15,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 431 transitions, 5323 flow [2024-06-14 12:11:15,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:11:15,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:11:15,803 INFO L175 Difference]: Start difference. First operand has 343 places, 413 transitions, 4393 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:11:15,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 431 transitions, 5323 flow [2024-06-14 12:11:17,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 431 transitions, 5227 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:17,910 INFO L231 Difference]: Finished difference. Result has 345 places, 415 transitions, 4416 flow [2024-06-14 12:11:17,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4416, PETRI_PLACES=345, PETRI_TRANSITIONS=415} [2024-06-14 12:11:17,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-14 12:11:17,911 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 415 transitions, 4416 flow [2024-06-14 12:11:17,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:17,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:17,911 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 12:11:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:11:17,912 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 12:11:17,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1092639688, now seen corresponding path program 2 times [2024-06-14 12:11:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:17,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084867369] [2024-06-14 12:11:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:18,777 INFO 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 12:11:18,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:18,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084867369] [2024-06-14 12:11:18,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084867369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:18,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:18,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:18,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688564982] [2024-06-14 12:11:18,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:18,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:18,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:18,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 415 transitions, 4416 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:18,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:18,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:18,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:20,480 INFO L124 PetriNetUnfolderBase]: 3890/5967 cut-off events. [2024-06-14 12:11:20,480 INFO L125 PetriNetUnfolderBase]: For 1141057/1141057 co-relation queries the response was YES. [2024-06-14 12:11:20,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53769 conditions, 5967 events. 3890/5967 cut-off events. For 1141057/1141057 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33254 event pairs, 824 based on Foata normal form. 4/5968 useless extension candidates. Maximal degree in co-relation 53610. Up to 5690 conditions per place. [2024-06-14 12:11:20,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 78 changer transitions 0/446 dead transitions. [2024-06-14 12:11:20,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 446 transitions, 5878 flow [2024-06-14 12:11:20,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:11:20,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-14 12:11:20,572 INFO L175 Difference]: Start difference. First operand has 345 places, 415 transitions, 4416 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:11:20,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 446 transitions, 5878 flow [2024-06-14 12:11:22,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 446 transitions, 5779 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:23,000 INFO L231 Difference]: Finished difference. Result has 348 places, 421 transitions, 4575 flow [2024-06-14 12:11:23,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4317, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4575, PETRI_PLACES=348, PETRI_TRANSITIONS=421} [2024-06-14 12:11:23,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 12:11:23,001 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 421 transitions, 4575 flow [2024-06-14 12:11:23,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:23,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:23,001 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 12:11:23,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:11:23,002 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 12:11:23,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1092627598, now seen corresponding path program 3 times [2024-06-14 12:11:23,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178605069] [2024-06-14 12:11:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:23,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:23,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:23,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178605069] [2024-06-14 12:11:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178605069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:23,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508628109] [2024-06-14 12:11:23,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:23,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:23,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 421 transitions, 4575 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:23,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:23,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:23,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:25,547 INFO L124 PetriNetUnfolderBase]: 3910/5995 cut-off events. [2024-06-14 12:11:25,547 INFO L125 PetriNetUnfolderBase]: For 1163601/1163601 co-relation queries the response was YES. [2024-06-14 12:11:25,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54311 conditions, 5995 events. 3910/5995 cut-off events. For 1163601/1163601 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33413 event pairs, 826 based on Foata normal form. 4/5996 useless extension candidates. Maximal degree in co-relation 54151. Up to 5706 conditions per place. [2024-06-14 12:11:25,638 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 79 changer transitions 0/450 dead transitions. [2024-06-14 12:11:25,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 450 transitions, 6011 flow [2024-06-14 12:11:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:11:25,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:11:25,640 INFO L175 Difference]: Start difference. First operand has 348 places, 421 transitions, 4575 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:11:25,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 450 transitions, 6011 flow [2024-06-14 12:11:28,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 450 transitions, 5840 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:28,149 INFO L231 Difference]: Finished difference. Result has 352 places, 424 transitions, 4622 flow [2024-06-14 12:11:28,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4421, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4622, PETRI_PLACES=352, PETRI_TRANSITIONS=424} [2024-06-14 12:11:28,150 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 12:11:28,150 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 424 transitions, 4622 flow [2024-06-14 12:11:28,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:28,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:28,150 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 12:11:28,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:11:28,151 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 12:11:28,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1092281638, now seen corresponding path program 4 times [2024-06-14 12:11:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:28,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862286812] [2024-06-14 12:11:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:28,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:28,947 INFO 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 12:11:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862286812] [2024-06-14 12:11:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862286812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:28,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:28,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:28,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285545545] [2024-06-14 12:11:28,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:28,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:28,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:28,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:29,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:29,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 424 transitions, 4622 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:29,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:29,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:29,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:30,599 INFO L124 PetriNetUnfolderBase]: 3898/5979 cut-off events. [2024-06-14 12:11:30,599 INFO L125 PetriNetUnfolderBase]: For 1163026/1163026 co-relation queries the response was YES. [2024-06-14 12:11:30,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53845 conditions, 5979 events. 3898/5979 cut-off events. For 1163026/1163026 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33315 event pairs, 828 based on Foata normal form. 4/5980 useless extension candidates. Maximal degree in co-relation 53684. Up to 5698 conditions per place. [2024-06-14 12:11:30,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 77 changer transitions 0/450 dead transitions. [2024-06-14 12:11:30,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 450 transitions, 5802 flow [2024-06-14 12:11:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:11:30,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:11:30,681 INFO L175 Difference]: Start difference. First operand has 352 places, 424 transitions, 4622 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:11:30,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 450 transitions, 5802 flow [2024-06-14 12:11:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 450 transitions, 5624 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:33,144 INFO L231 Difference]: Finished difference. Result has 355 places, 424 transitions, 4604 flow [2024-06-14 12:11:33,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4444, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4604, PETRI_PLACES=355, PETRI_TRANSITIONS=424} [2024-06-14 12:11:33,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 12:11:33,144 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 424 transitions, 4604 flow [2024-06-14 12:11:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:33,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:33,145 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 12:11:33,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:11:33,145 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 12:11:33,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash 688430574, now seen corresponding path program 4 times [2024-06-14 12:11:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411338429] [2024-06-14 12:11:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:34,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:34,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411338429] [2024-06-14 12:11:34,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411338429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:34,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:34,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901826141] [2024-06-14 12:11:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:34,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:34,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:34,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 424 transitions, 4604 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:34,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:34,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:34,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:35,511 INFO L124 PetriNetUnfolderBase]: 3903/5987 cut-off events. [2024-06-14 12:11:35,511 INFO L125 PetriNetUnfolderBase]: For 1168047/1168053 co-relation queries the response was YES. [2024-06-14 12:11:35,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54036 conditions, 5987 events. 3903/5987 cut-off events. For 1168047/1168053 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33405 event pairs, 830 based on Foata normal form. 5/5988 useless extension candidates. Maximal degree in co-relation 53874. Up to 5892 conditions per place. [2024-06-14 12:11:35,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 29 changer transitions 0/447 dead transitions. [2024-06-14 12:11:35,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 447 transitions, 5643 flow [2024-06-14 12:11:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:11:35,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:11:35,587 INFO L175 Difference]: Start difference. First operand has 355 places, 424 transitions, 4604 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:11:35,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 447 transitions, 5643 flow [2024-06-14 12:11:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 447 transitions, 5457 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 12:11:37,527 INFO L231 Difference]: Finished difference. Result has 354 places, 427 transitions, 4584 flow [2024-06-14 12:11:37,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4418, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4584, PETRI_PLACES=354, PETRI_TRANSITIONS=427} [2024-06-14 12:11:37,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-14 12:11:37,527 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 427 transitions, 4584 flow [2024-06-14 12:11:37,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:37,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:37,528 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 12:11:37,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:11:37,528 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 12:11:37,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 688251828, now seen corresponding path program 7 times [2024-06-14 12:11:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:37,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525108239] [2024-06-14 12:11:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:37,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:38,365 INFO 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 12:11:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525108239] [2024-06-14 12:11:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525108239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:38,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:38,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:38,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078183847] [2024-06-14 12:11:38,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:38,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:38,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:38,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:38,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 427 transitions, 4584 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:38,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:38,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:38,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:39,816 INFO L124 PetriNetUnfolderBase]: 3913/6004 cut-off events. [2024-06-14 12:11:39,817 INFO L125 PetriNetUnfolderBase]: For 1195562/1195571 co-relation queries the response was YES. [2024-06-14 12:11:40,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54503 conditions, 6004 events. 3913/6004 cut-off events. For 1195562/1195571 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33507 event pairs, 824 based on Foata normal form. 5/6002 useless extension candidates. Maximal degree in co-relation 54340. Up to 5706 conditions per place. [2024-06-14 12:11:40,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 103 changer transitions 0/457 dead transitions. [2024-06-14 12:11:40,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 457 transitions, 6132 flow [2024-06-14 12:11:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:11:40,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:11:40,048 INFO L175 Difference]: Start difference. First operand has 354 places, 427 transitions, 4584 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:11:40,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 457 transitions, 6132 flow [2024-06-14 12:11:42,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 457 transitions, 5988 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:42,154 INFO L231 Difference]: Finished difference. Result has 356 places, 433 transitions, 4810 flow [2024-06-14 12:11:42,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4810, PETRI_PLACES=356, PETRI_TRANSITIONS=433} [2024-06-14 12:11:42,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 12:11:42,154 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 433 transitions, 4810 flow [2024-06-14 12:11:42,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:42,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:42,155 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 12:11:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:11:42,155 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 12:11:42,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash 694686684, now seen corresponding path program 5 times [2024-06-14 12:11:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653225419] [2024-06-14 12:11:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:42,971 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 12:11:42,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:42,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653225419] [2024-06-14 12:11:42,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653225419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:42,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:42,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626507770] [2024-06-14 12:11:42,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:43,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:43,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 433 transitions, 4810 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:43,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:43,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:43,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:44,493 INFO L124 PetriNetUnfolderBase]: 3926/6020 cut-off events. [2024-06-14 12:11:44,493 INFO L125 PetriNetUnfolderBase]: For 1222100/1222112 co-relation queries the response was YES. [2024-06-14 12:11:44,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55616 conditions, 6020 events. 3926/6020 cut-off events. For 1222100/1222112 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33593 event pairs, 830 based on Foata normal form. 9/6024 useless extension candidates. Maximal degree in co-relation 55452. Up to 5911 conditions per place. [2024-06-14 12:11:44,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 42 changer transitions 0/462 dead transitions. [2024-06-14 12:11:44,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 462 transitions, 6211 flow [2024-06-14 12:11:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-14 12:11:44,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-14 12:11:44,583 INFO L175 Difference]: Start difference. First operand has 356 places, 433 transitions, 4810 flow. Second operand 10 states and 147 transitions. [2024-06-14 12:11:44,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 462 transitions, 6211 flow [2024-06-14 12:11:46,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 462 transitions, 5980 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:46,850 INFO L231 Difference]: Finished difference. Result has 362 places, 439 transitions, 4883 flow [2024-06-14 12:11:46,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4883, PETRI_PLACES=362, PETRI_TRANSITIONS=439} [2024-06-14 12:11:46,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 12:11:46,851 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 439 transitions, 4883 flow [2024-06-14 12:11:46,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:46,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:46,851 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 12:11:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:11:46,851 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 12:11:46,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:46,852 INFO L85 PathProgramCache]: Analyzing trace with hash 95337838, now seen corresponding path program 6 times [2024-06-14 12:11:46,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:46,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674371117] [2024-06-14 12:11:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:47,749 INFO 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 12:11:47,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:47,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674371117] [2024-06-14 12:11:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674371117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:47,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:47,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:47,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869959783] [2024-06-14 12:11:47,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:47,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:47,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:47,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:47,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 439 transitions, 4883 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:47,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:47,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:47,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:49,211 INFO L124 PetriNetUnfolderBase]: 3923/6016 cut-off events. [2024-06-14 12:11:49,212 INFO L125 PetriNetUnfolderBase]: For 1238962/1238974 co-relation queries the response was YES. [2024-06-14 12:11:49,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55752 conditions, 6016 events. 3923/6016 cut-off events. For 1238962/1238974 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33565 event pairs, 836 based on Foata normal form. 9/6020 useless extension candidates. Maximal degree in co-relation 55586. Up to 5908 conditions per place. [2024-06-14 12:11:49,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 41 changer transitions 0/456 dead transitions. [2024-06-14 12:11:49,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 456 transitions, 5836 flow [2024-06-14 12:11:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:11:49,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-14 12:11:49,304 INFO L175 Difference]: Start difference. First operand has 362 places, 439 transitions, 4883 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:11:49,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 456 transitions, 5836 flow [2024-06-14 12:11:51,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 456 transitions, 5594 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:51,109 INFO L231 Difference]: Finished difference. Result has 364 places, 439 transitions, 4729 flow [2024-06-14 12:11:51,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4729, PETRI_PLACES=364, PETRI_TRANSITIONS=439} [2024-06-14 12:11:51,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-14 12:11:51,110 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 439 transitions, 4729 flow [2024-06-14 12:11:51,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:51,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:51,110 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 12:11:51,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:11:51,110 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 12:11:51,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:51,111 INFO L85 PathProgramCache]: Analyzing trace with hash 198427408, now seen corresponding path program 7 times [2024-06-14 12:11:51,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:51,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986768592] [2024-06-14 12:11:51,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:51,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:51,904 INFO 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 12:11:51,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:51,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986768592] [2024-06-14 12:11:51,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986768592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:51,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:51,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:51,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061958822] [2024-06-14 12:11:51,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:51,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:51,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:51,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:51,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 439 transitions, 4729 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:51,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:51,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:53,265 INFO L124 PetriNetUnfolderBase]: 3928/6023 cut-off events. [2024-06-14 12:11:53,266 INFO L125 PetriNetUnfolderBase]: For 1260435/1260447 co-relation queries the response was YES. [2024-06-14 12:11:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55975 conditions, 6023 events. 3928/6023 cut-off events. For 1260435/1260447 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33619 event pairs, 839 based on Foata normal form. 9/6027 useless extension candidates. Maximal degree in co-relation 55807. Up to 5853 conditions per place. [2024-06-14 12:11:53,358 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 80 changer transitions 0/464 dead transitions. [2024-06-14 12:11:53,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 464 transitions, 6358 flow [2024-06-14 12:11:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:11:53,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:11:53,359 INFO L175 Difference]: Start difference. First operand has 364 places, 439 transitions, 4729 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:11:53,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 464 transitions, 6358 flow [2024-06-14 12:11:55,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 464 transitions, 6276 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:55,499 INFO L231 Difference]: Finished difference. Result has 365 places, 445 transitions, 5039 flow [2024-06-14 12:11:55,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4647, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5039, PETRI_PLACES=365, PETRI_TRANSITIONS=445} [2024-06-14 12:11:55,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-14 12:11:55,500 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 445 transitions, 5039 flow [2024-06-14 12:11:55,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:55,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:55,500 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 12:11:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:11:55,501 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 12:11:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 688550358, now seen corresponding path program 8 times [2024-06-14 12:11:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674226245] [2024-06-14 12:11:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:56,371 INFO 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 12:11:56,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:56,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674226245] [2024-06-14 12:11:56,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674226245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:56,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:56,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278012177] [2024-06-14 12:11:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:56,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:11:56,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 445 transitions, 5039 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:56,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:56,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:11:56,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:57,726 INFO L124 PetriNetUnfolderBase]: 3938/6039 cut-off events. [2024-06-14 12:11:57,726 INFO L125 PetriNetUnfolderBase]: For 1292590/1292599 co-relation queries the response was YES. [2024-06-14 12:11:57,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56597 conditions, 6039 events. 3938/6039 cut-off events. For 1292590/1292599 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33764 event pairs, 818 based on Foata normal form. 5/6037 useless extension candidates. Maximal degree in co-relation 56428. Up to 5737 conditions per place. [2024-06-14 12:11:57,818 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 104 changer transitions 0/470 dead transitions. [2024-06-14 12:11:57,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 470 transitions, 6505 flow [2024-06-14 12:11:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:11:57,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-14 12:11:57,820 INFO L175 Difference]: Start difference. First operand has 365 places, 445 transitions, 5039 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:11:57,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 470 transitions, 6505 flow [2024-06-14 12:12:00,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 470 transitions, 6293 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:00,191 INFO L231 Difference]: Finished difference. Result has 369 places, 448 transitions, 5073 flow [2024-06-14 12:12:00,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4827, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5073, PETRI_PLACES=369, PETRI_TRANSITIONS=448} [2024-06-14 12:12:00,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-14 12:12:00,191 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 448 transitions, 5073 flow [2024-06-14 12:12:00,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:00,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:00,192 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 12:12:00,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:12:00,192 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 12:12:00,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 688550730, now seen corresponding path program 4 times [2024-06-14 12:12:00,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:00,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285796264] [2024-06-14 12:12:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:00,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:00,964 INFO 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 12:12:00,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:00,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285796264] [2024-06-14 12:12:00,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285796264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:00,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:00,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562528901] [2024-06-14 12:12:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:00,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:00,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:01,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:01,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 448 transitions, 5073 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:01,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:01,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:01,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:02,396 INFO L124 PetriNetUnfolderBase]: 3943/6044 cut-off events. [2024-06-14 12:12:02,396 INFO L125 PetriNetUnfolderBase]: For 1304856/1304868 co-relation queries the response was YES. [2024-06-14 12:12:02,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56793 conditions, 6044 events. 3943/6044 cut-off events. For 1304856/1304868 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33749 event pairs, 833 based on Foata normal form. 9/6048 useless extension candidates. Maximal degree in co-relation 56622. Up to 5901 conditions per place. [2024-06-14 12:12:02,492 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 70 changer transitions 0/480 dead transitions. [2024-06-14 12:12:02,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 480 transitions, 6701 flow [2024-06-14 12:12:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 12:12:02,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-14 12:12:02,493 INFO L175 Difference]: Start difference. First operand has 369 places, 448 transitions, 5073 flow. Second operand 8 states and 127 transitions. [2024-06-14 12:12:02,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 480 transitions, 6701 flow [2024-06-14 12:12:04,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 480 transitions, 6492 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:04,763 INFO L231 Difference]: Finished difference. Result has 373 places, 461 transitions, 5249 flow [2024-06-14 12:12:04,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5249, PETRI_PLACES=373, PETRI_TRANSITIONS=461} [2024-06-14 12:12:04,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-14 12:12:04,764 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 461 transitions, 5249 flow [2024-06-14 12:12:04,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:04,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:04,764 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 12:12:04,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:12:04,764 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 12:12:04,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1043050734, now seen corresponding path program 8 times [2024-06-14 12:12:04,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:04,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536763433] [2024-06-14 12:12:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:04,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:05,551 INFO 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 12:12:05,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:05,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536763433] [2024-06-14 12:12:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536763433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:05,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:05,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:05,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617245451] [2024-06-14 12:12:05,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:05,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:05,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:05,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 461 transitions, 5249 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:05,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:05,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:05,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:07,002 INFO L124 PetriNetUnfolderBase]: 3956/6062 cut-off events. [2024-06-14 12:12:07,002 INFO L125 PetriNetUnfolderBase]: For 1336392/1336404 co-relation queries the response was YES. [2024-06-14 12:12:07,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57536 conditions, 6062 events. 3956/6062 cut-off events. For 1336392/1336404 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33848 event pairs, 833 based on Foata normal form. 9/6066 useless extension candidates. Maximal degree in co-relation 57363. Up to 5889 conditions per place. [2024-06-14 12:12:07,096 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 87 changer transitions 0/483 dead transitions. [2024-06-14 12:12:07,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 483 transitions, 6864 flow [2024-06-14 12:12:07,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:12:07,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:12:07,098 INFO L175 Difference]: Start difference. First operand has 373 places, 461 transitions, 5249 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:12:07,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 483 transitions, 6864 flow [2024-06-14 12:12:09,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 483 transitions, 6736 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-14 12:12:09,307 INFO L231 Difference]: Finished difference. Result has 378 places, 467 transitions, 5465 flow [2024-06-14 12:12:09,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5121, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5465, PETRI_PLACES=378, PETRI_TRANSITIONS=467} [2024-06-14 12:12:09,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 12:12:09,308 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 467 transitions, 5465 flow [2024-06-14 12:12:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:09,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:09,308 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 12:12:09,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:12:09,309 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 12:12:09,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 210391858, now seen corresponding path program 9 times [2024-06-14 12:12:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:09,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288125644] [2024-06-14 12:12:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:09,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:10,147 INFO 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 12:12:10,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288125644] [2024-06-14 12:12:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288125644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:10,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:10,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052709654] [2024-06-14 12:12:10,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:10,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:10,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 467 transitions, 5465 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:10,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:10,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:10,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:11,631 INFO L124 PetriNetUnfolderBase]: 3953/6058 cut-off events. [2024-06-14 12:12:11,632 INFO L125 PetriNetUnfolderBase]: For 1350263/1350275 co-relation queries the response was YES. [2024-06-14 12:12:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57409 conditions, 6058 events. 3953/6058 cut-off events. For 1350263/1350275 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33846 event pairs, 827 based on Foata normal form. 9/6062 useless extension candidates. Maximal degree in co-relation 57234. Up to 5886 conditions per place. [2024-06-14 12:12:11,715 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 86 changer transitions 0/482 dead transitions. [2024-06-14 12:12:11,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 482 transitions, 6690 flow [2024-06-14 12:12:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:12:11,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:12:11,717 INFO L175 Difference]: Start difference. First operand has 378 places, 467 transitions, 5465 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:12:11,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 482 transitions, 6690 flow [2024-06-14 12:12:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 482 transitions, 6435 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:14,421 INFO L231 Difference]: Finished difference. Result has 382 places, 467 transitions, 5388 flow [2024-06-14 12:12:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5210, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5388, PETRI_PLACES=382, PETRI_TRANSITIONS=467} [2024-06-14 12:12:14,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-14 12:12:14,422 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 467 transitions, 5388 flow [2024-06-14 12:12:14,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:14,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:14,422 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 12:12:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:12:14,422 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 12:12:14,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 210391672, now seen corresponding path program 9 times [2024-06-14 12:12:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:14,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132604864] [2024-06-14 12:12:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:14,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:15,203 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 12:12:15,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132604864] [2024-06-14 12:12:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132604864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:15,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:15,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937386684] [2024-06-14 12:12:15,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:15,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 467 transitions, 5388 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:15,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:15,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:16,753 INFO L124 PetriNetUnfolderBase]: 3963/6074 cut-off events. [2024-06-14 12:12:16,753 INFO L125 PetriNetUnfolderBase]: For 1379657/1379666 co-relation queries the response was YES. [2024-06-14 12:12:16,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57579 conditions, 6074 events. 3963/6074 cut-off events. For 1379657/1379666 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33941 event pairs, 814 based on Foata normal form. 5/6072 useless extension candidates. Maximal degree in co-relation 57403. Up to 5768 conditions per place. [2024-06-14 12:12:16,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 110 changer transitions 0/488 dead transitions. [2024-06-14 12:12:16,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 488 transitions, 6897 flow [2024-06-14 12:12:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:12:16,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:12:16,835 INFO L175 Difference]: Start difference. First operand has 382 places, 467 transitions, 5388 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:12:16,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 488 transitions, 6897 flow [2024-06-14 12:12:19,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 488 transitions, 6713 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:19,988 INFO L231 Difference]: Finished difference. Result has 383 places, 470 transitions, 5465 flow [2024-06-14 12:12:19,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5204, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5465, PETRI_PLACES=383, PETRI_TRANSITIONS=470} [2024-06-14 12:12:19,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-14 12:12:19,989 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 470 transitions, 5465 flow [2024-06-14 12:12:19,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:19,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:19,989 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 12:12:19,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:12:19,989 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 12:12:19,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash 210404134, now seen corresponding path program 5 times [2024-06-14 12:12:19,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:19,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552519758] [2024-06-14 12:12:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:19,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:20,816 INFO 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 12:12:20,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552519758] [2024-06-14 12:12:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552519758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:20,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:20,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:20,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691959387] [2024-06-14 12:12:20,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:20,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:20,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:20,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:20,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 470 transitions, 5465 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:20,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:20,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:20,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:22,295 INFO L124 PetriNetUnfolderBase]: 3976/6090 cut-off events. [2024-06-14 12:12:22,295 INFO L125 PetriNetUnfolderBase]: For 1403286/1403298 co-relation queries the response was YES. [2024-06-14 12:12:22,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58166 conditions, 6090 events. 3976/6090 cut-off events. For 1403286/1403298 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33987 event pairs, 835 based on Foata normal form. 9/6094 useless extension candidates. Maximal degree in co-relation 57989. Up to 5944 conditions per place. [2024-06-14 12:12:22,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 77 changer transitions 0/493 dead transitions. [2024-06-14 12:12:22,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 493 transitions, 7035 flow [2024-06-14 12:12:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:12:22,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:12:22,542 INFO L175 Difference]: Start difference. First operand has 383 places, 470 transitions, 5465 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:12:22,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 493 transitions, 7035 flow [2024-06-14 12:12:25,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 493 transitions, 6862 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:25,831 INFO L231 Difference]: Finished difference. Result has 386 places, 477 transitions, 5539 flow [2024-06-14 12:12:25,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5539, PETRI_PLACES=386, PETRI_TRANSITIONS=477} [2024-06-14 12:12:25,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-14 12:12:25,832 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 477 transitions, 5539 flow [2024-06-14 12:12:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:25,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:25,832 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 12:12:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:12:25,832 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 12:12:25,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash 210392044, now seen corresponding path program 6 times [2024-06-14 12:12:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916905606] [2024-06-14 12:12:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:26,688 INFO 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 12:12:26,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:26,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916905606] [2024-06-14 12:12:26,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916905606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:26,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:26,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466105146] [2024-06-14 12:12:26,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:26,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:26,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:26,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:26,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 477 transitions, 5539 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:26,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:26,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:26,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:28,136 INFO L124 PetriNetUnfolderBase]: 3973/6086 cut-off events. [2024-06-14 12:12:28,136 INFO L125 PetriNetUnfolderBase]: For 1419952/1419964 co-relation queries the response was YES. [2024-06-14 12:12:28,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58069 conditions, 6086 events. 3973/6086 cut-off events. For 1419952/1419964 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34037 event pairs, 839 based on Foata normal form. 9/6090 useless extension candidates. Maximal degree in co-relation 57891. Up to 5941 conditions per place. [2024-06-14 12:12:28,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 414 selfloop transitions, 75 changer transitions 0/492 dead transitions. [2024-06-14 12:12:28,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 492 transitions, 6790 flow [2024-06-14 12:12:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:12:28,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-14 12:12:28,238 INFO L175 Difference]: Start difference. First operand has 386 places, 477 transitions, 5539 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:12:28,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 492 transitions, 6790 flow [2024-06-14 12:12:31,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 492 transitions, 6639 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:31,390 INFO L231 Difference]: Finished difference. Result has 390 places, 477 transitions, 5544 flow [2024-06-14 12:12:31,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5544, PETRI_PLACES=390, PETRI_TRANSITIONS=477} [2024-06-14 12:12:31,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 12:12:31,391 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 477 transitions, 5544 flow [2024-06-14 12:12:31,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:31,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:31,391 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 12:12:31,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:12:31,391 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 12:12:31,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash 573840180, now seen corresponding path program 10 times [2024-06-14 12:12:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:31,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946372433] [2024-06-14 12:12:31,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:31,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:32,158 INFO 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 12:12:32,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:32,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946372433] [2024-06-14 12:12:32,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946372433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:32,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:32,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:32,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757301881] [2024-06-14 12:12:32,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:32,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:32,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:32,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:32,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 477 transitions, 5544 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:32,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:32,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:32,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:33,706 INFO L124 PetriNetUnfolderBase]: 3967/6080 cut-off events. [2024-06-14 12:12:33,707 INFO L125 PetriNetUnfolderBase]: For 1436969/1436978 co-relation queries the response was YES. [2024-06-14 12:12:33,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57961 conditions, 6080 events. 3967/6080 cut-off events. For 1436969/1436978 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 33956 event pairs, 839 based on Foata normal form. 5/6078 useless extension candidates. Maximal degree in co-relation 57782. Up to 5983 conditions per place. [2024-06-14 12:12:33,802 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 39 changer transitions 0/488 dead transitions. [2024-06-14 12:12:33,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 488 transitions, 6542 flow [2024-06-14 12:12:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 12:12:33,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-14 12:12:33,804 INFO L175 Difference]: Start difference. First operand has 390 places, 477 transitions, 5544 flow. Second operand 8 states and 119 transitions. [2024-06-14 12:12:33,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 488 transitions, 6542 flow [2024-06-14 12:12:36,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 488 transitions, 6404 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:36,962 INFO L231 Difference]: Finished difference. Result has 393 places, 477 transitions, 5490 flow [2024-06-14 12:12:36,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5490, PETRI_PLACES=393, PETRI_TRANSITIONS=477} [2024-06-14 12:12:36,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 12:12:36,963 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 477 transitions, 5490 flow [2024-06-14 12:12:36,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:36,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:36,963 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 12:12:36,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:12:36,963 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 12:12:36,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 929154604, now seen corresponding path program 7 times [2024-06-14 12:12:36,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:36,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471801069] [2024-06-14 12:12:36,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:36,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:37,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:37,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471801069] [2024-06-14 12:12:37,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471801069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:37,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:37,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592943267] [2024-06-14 12:12:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:37,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:37,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:37,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:37,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 477 transitions, 5490 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:37,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:37,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:37,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:39,214 INFO L124 PetriNetUnfolderBase]: 3972/6085 cut-off events. [2024-06-14 12:12:39,214 INFO L125 PetriNetUnfolderBase]: For 1453284/1453296 co-relation queries the response was YES. [2024-06-14 12:12:39,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58142 conditions, 6085 events. 3972/6085 cut-off events. For 1453284/1453296 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33997 event pairs, 823 based on Foata normal form. 9/6089 useless extension candidates. Maximal degree in co-relation 57962. Up to 6022 conditions per place. [2024-06-14 12:12:39,311 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 34 changer transitions 0/492 dead transitions. [2024-06-14 12:12:39,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 492 transitions, 6797 flow [2024-06-14 12:12:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:12:39,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-14 12:12:39,312 INFO L175 Difference]: Start difference. First operand has 393 places, 477 transitions, 5490 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:12:39,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 492 transitions, 6797 flow [2024-06-14 12:12:42,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 492 transitions, 6693 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:42,758 INFO L231 Difference]: Finished difference. Result has 394 places, 480 transitions, 5520 flow [2024-06-14 12:12:42,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5520, PETRI_PLACES=394, PETRI_TRANSITIONS=480} [2024-06-14 12:12:42,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-14 12:12:42,759 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 480 transitions, 5520 flow [2024-06-14 12:12:42,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:42,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:42,759 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 12:12:42,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:12:42,759 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 12:12:42,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:42,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1215124724, now seen corresponding path program 8 times [2024-06-14 12:12:42,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:42,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846517994] [2024-06-14 12:12:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:42,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:43,489 INFO 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 12:12:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846517994] [2024-06-14 12:12:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846517994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:43,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:43,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938497647] [2024-06-14 12:12:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:43,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:43,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 480 transitions, 5520 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:43,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:43,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:43,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:44,992 INFO L124 PetriNetUnfolderBase]: 3977/6092 cut-off events. [2024-06-14 12:12:44,993 INFO L125 PetriNetUnfolderBase]: For 1476909/1476921 co-relation queries the response was YES. [2024-06-14 12:12:45,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58324 conditions, 6092 events. 3977/6092 cut-off events. For 1476909/1476921 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34059 event pairs, 827 based on Foata normal form. 9/6096 useless extension candidates. Maximal degree in co-relation 58145. Up to 6026 conditions per place. [2024-06-14 12:12:45,094 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 38 changer transitions 0/496 dead transitions. [2024-06-14 12:12:45,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 496 transitions, 6828 flow [2024-06-14 12:12:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 12:12:45,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-14 12:12:45,095 INFO L175 Difference]: Start difference. First operand has 394 places, 480 transitions, 5520 flow. Second operand 8 states and 116 transitions. [2024-06-14 12:12:45,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 496 transitions, 6828 flow [2024-06-14 12:12:48,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 496 transitions, 6708 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:48,656 INFO L231 Difference]: Finished difference. Result has 397 places, 484 transitions, 5554 flow [2024-06-14 12:12:48,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5554, PETRI_PLACES=397, PETRI_TRANSITIONS=484} [2024-06-14 12:12:48,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 12:12:48,657 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 484 transitions, 5554 flow [2024-06-14 12:12:48,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:48,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:48,657 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 12:12:48,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:12:48,657 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 12:12:48,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1364672112, now seen corresponding path program 10 times [2024-06-14 12:12:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717594845] [2024-06-14 12:12:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:48,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:49,412 INFO 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 12:12:49,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:49,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717594845] [2024-06-14 12:12:49,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717594845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:49,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:49,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:49,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593724818] [2024-06-14 12:12:49,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:49,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:49,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:49,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:49,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:49,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 484 transitions, 5554 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:49,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:49,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:49,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:50,942 INFO L124 PetriNetUnfolderBase]: 3982/6099 cut-off events. [2024-06-14 12:12:50,942 INFO L125 PetriNetUnfolderBase]: For 1501203/1501215 co-relation queries the response was YES. [2024-06-14 12:12:51,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58614 conditions, 6099 events. 3982/6099 cut-off events. For 1501203/1501215 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34090 event pairs, 825 based on Foata normal form. 9/6103 useless extension candidates. Maximal degree in co-relation 58433. Up to 6031 conditions per place. [2024-06-14 12:12:51,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 41 changer transitions 0/499 dead transitions. [2024-06-14 12:12:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 499 transitions, 6904 flow [2024-06-14 12:12:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 12:12:51,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-14 12:12:51,042 INFO L175 Difference]: Start difference. First operand has 397 places, 484 transitions, 5554 flow. Second operand 8 states and 116 transitions. [2024-06-14 12:12:51,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 499 transitions, 6904 flow [2024-06-14 12:12:54,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 499 transitions, 6805 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:54,466 INFO L231 Difference]: Finished difference. Result has 400 places, 487 transitions, 5628 flow [2024-06-14 12:12:54,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5628, PETRI_PLACES=400, PETRI_TRANSITIONS=487} [2024-06-14 12:12:54,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 12:12:54,467 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 487 transitions, 5628 flow [2024-06-14 12:12:54,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:54,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:54,467 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 12:12:54,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:12:54,467 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 12:12:54,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:54,468 INFO L85 PathProgramCache]: Analyzing trace with hash -182995798, now seen corresponding path program 11 times [2024-06-14 12:12:54,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:54,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561337038] [2024-06-14 12:12:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:54,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:55,243 INFO 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 12:12:55,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:55,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561337038] [2024-06-14 12:12:55,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561337038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:55,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:55,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:55,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066237793] [2024-06-14 12:12:55,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:55,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:55,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:12:55,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 487 transitions, 5628 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:12:55,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:55,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:12:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:56,788 INFO L124 PetriNetUnfolderBase]: 3976/6093 cut-off events. [2024-06-14 12:12:56,788 INFO L125 PetriNetUnfolderBase]: For 1517091/1517100 co-relation queries the response was YES. [2024-06-14 12:12:56,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58432 conditions, 6093 events. 3976/6093 cut-off events. For 1517091/1517100 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34079 event pairs, 832 based on Foata normal form. 5/6091 useless extension candidates. Maximal degree in co-relation 58250. Up to 5941 conditions per place. [2024-06-14 12:12:56,879 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 67 changer transitions 0/500 dead transitions. [2024-06-14 12:12:56,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 500 transitions, 6898 flow [2024-06-14 12:12:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:56,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 12:12:56,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-14 12:12:56,881 INFO L175 Difference]: Start difference. First operand has 400 places, 487 transitions, 5628 flow. Second operand 8 states and 122 transitions. [2024-06-14 12:12:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 500 transitions, 6898 flow [2024-06-14 12:13:00,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 500 transitions, 6620 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:00,125 INFO L231 Difference]: Finished difference. Result has 400 places, 487 transitions, 5490 flow [2024-06-14 12:13:00,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5490, PETRI_PLACES=400, PETRI_TRANSITIONS=487} [2024-06-14 12:13:00,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 12:13:00,125 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 487 transitions, 5490 flow [2024-06-14 12:13:00,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:00,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:00,126 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 12:13:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:13:00,126 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 12:13:00,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:00,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1958039818, now seen corresponding path program 9 times [2024-06-14 12:13:00,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:00,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955674561] [2024-06-14 12:13:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:00,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:00,828 INFO 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 12:13:00,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:00,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955674561] [2024-06-14 12:13:00,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955674561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:00,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192988870] [2024-06-14 12:13:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:00,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:00,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 487 transitions, 5490 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:00,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:00,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:00,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:02,367 INFO L124 PetriNetUnfolderBase]: 3981/6098 cut-off events. [2024-06-14 12:13:02,367 INFO L125 PetriNetUnfolderBase]: For 1529900/1529912 co-relation queries the response was YES. [2024-06-14 12:13:02,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58226 conditions, 6098 events. 3981/6098 cut-off events. For 1529900/1529912 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34098 event pairs, 820 based on Foata normal form. 9/6102 useless extension candidates. Maximal degree in co-relation 58045. Up to 6044 conditions per place. [2024-06-14 12:13:02,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 30 changer transitions 0/501 dead transitions. [2024-06-14 12:13:02,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 501 transitions, 6571 flow [2024-06-14 12:13:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-14 12:13:02,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-14 12:13:02,455 INFO L175 Difference]: Start difference. First operand has 400 places, 487 transitions, 5490 flow. Second operand 8 states and 114 transitions. [2024-06-14 12:13:02,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 501 transitions, 6571 flow [2024-06-14 12:13:04,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 501 transitions, 6312 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:04,891 INFO L231 Difference]: Finished difference. Result has 400 places, 490 transitions, 5357 flow [2024-06-14 12:13:04,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5357, PETRI_PLACES=400, PETRI_TRANSITIONS=490} [2024-06-14 12:13:04,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 12:13:04,891 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 490 transitions, 5357 flow [2024-06-14 12:13:04,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:04,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:04,892 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 12:13:04,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:13:04,894 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 12:13:04,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:04,895 INFO L85 PathProgramCache]: Analyzing trace with hash 443132502, now seen corresponding path program 10 times [2024-06-14 12:13:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:04,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256654892] [2024-06-14 12:13:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:05,691 INFO 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 12:13:05,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256654892] [2024-06-14 12:13:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256654892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:05,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:05,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962370879] [2024-06-14 12:13:05,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:05,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:05,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:05,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:05,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 490 transitions, 5357 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:05,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:05,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:05,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:07,329 INFO L124 PetriNetUnfolderBase]: 3978/6094 cut-off events. [2024-06-14 12:13:07,329 INFO L125 PetriNetUnfolderBase]: For 1542406/1542418 co-relation queries the response was YES. [2024-06-14 12:13:07,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57472 conditions, 6094 events. 3978/6094 cut-off events. For 1542406/1542418 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34091 event pairs, 826 based on Foata normal form. 9/6098 useless extension candidates. Maximal degree in co-relation 57292. Up to 6040 conditions per place. [2024-06-14 12:13:07,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 29 changer transitions 0/501 dead transitions. [2024-06-14 12:13:07,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 501 transitions, 6384 flow [2024-06-14 12:13:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-14 12:13:07,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-14 12:13:07,417 INFO L175 Difference]: Start difference. First operand has 400 places, 490 transitions, 5357 flow. Second operand 8 states and 115 transitions. [2024-06-14 12:13:07,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 501 transitions, 6384 flow [2024-06-14 12:13:10,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 501 transitions, 6280 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:10,300 INFO L231 Difference]: Finished difference. Result has 402 places, 490 transitions, 5317 flow [2024-06-14 12:13:10,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5253, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5317, PETRI_PLACES=402, PETRI_TRANSITIONS=490} [2024-06-14 12:13:10,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 12:13:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 490 transitions, 5317 flow [2024-06-14 12:13:10,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:10,303 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 12:13:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:13:10,304 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 12:13:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 442894980, now seen corresponding path program 12 times [2024-06-14 12:13:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765606881] [2024-06-14 12:13:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:11,102 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 12:13:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:11,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765606881] [2024-06-14 12:13:11,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765606881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:11,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:11,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:11,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885269928] [2024-06-14 12:13:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:11,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:11,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 490 transitions, 5317 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:11,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:11,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:11,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:12,803 INFO L124 PetriNetUnfolderBase]: 3972/6088 cut-off events. [2024-06-14 12:13:12,803 INFO L125 PetriNetUnfolderBase]: For 1559193/1559202 co-relation queries the response was YES. [2024-06-14 12:13:12,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57344 conditions, 6088 events. 3972/6088 cut-off events. For 1559193/1559202 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34050 event pairs, 835 based on Foata normal form. 5/6086 useless extension candidates. Maximal degree in co-relation 57163. Up to 5978 conditions per place. [2024-06-14 12:13:12,886 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 46 changer transitions 0/503 dead transitions. [2024-06-14 12:13:12,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 503 transitions, 6599 flow [2024-06-14 12:13:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 12:13:12,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-14 12:13:12,887 INFO L175 Difference]: Start difference. First operand has 402 places, 490 transitions, 5317 flow. Second operand 8 states and 123 transitions. [2024-06-14 12:13:12,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 503 transitions, 6599 flow [2024-06-14 12:13:16,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 503 transitions, 6513 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:16,562 INFO L231 Difference]: Finished difference. Result has 403 places, 490 transitions, 5329 flow [2024-06-14 12:13:16,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5329, PETRI_PLACES=403, PETRI_TRANSITIONS=490} [2024-06-14 12:13:16,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-14 12:13:16,563 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 490 transitions, 5329 flow [2024-06-14 12:13:16,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:16,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:16,563 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 12:13:16,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:13:16,563 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 12:13:16,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1364909076, now seen corresponding path program 11 times [2024-06-14 12:13:16,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130099840] [2024-06-14 12:13:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:16,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:17,348 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 12:13:17,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:17,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130099840] [2024-06-14 12:13:17,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130099840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:17,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:17,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:17,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392978089] [2024-06-14 12:13:17,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:17,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:17,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:17,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 490 transitions, 5329 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:17,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:17,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:17,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:18,987 INFO L124 PetriNetUnfolderBase]: 3977/6093 cut-off events. [2024-06-14 12:13:18,988 INFO L125 PetriNetUnfolderBase]: For 1575809/1575821 co-relation queries the response was YES. [2024-06-14 12:13:19,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57616 conditions, 6093 events. 3977/6093 cut-off events. For 1575809/1575821 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34065 event pairs, 825 based on Foata normal form. 9/6097 useless extension candidates. Maximal degree in co-relation 57434. Up to 5999 conditions per place. [2024-06-14 12:13:19,072 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 62 changer transitions 0/505 dead transitions. [2024-06-14 12:13:19,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 505 transitions, 6663 flow [2024-06-14 12:13:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:13:19,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-14 12:13:19,073 INFO L175 Difference]: Start difference. First operand has 403 places, 490 transitions, 5329 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:13:19,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 505 transitions, 6663 flow [2024-06-14 12:13:22,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 505 transitions, 6474 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:22,392 INFO L231 Difference]: Finished difference. Result has 403 places, 493 transitions, 5317 flow [2024-06-14 12:13:22,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5317, PETRI_PLACES=403, PETRI_TRANSITIONS=493} [2024-06-14 12:13:22,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-14 12:13:22,393 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 493 transitions, 5317 flow [2024-06-14 12:13:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:22,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:22,394 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 12:13:22,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:13:22,394 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 12:13:22,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1558305172, now seen corresponding path program 11 times [2024-06-14 12:13:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:22,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337602242] [2024-06-14 12:13:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:23,253 INFO 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 12:13:23,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337602242] [2024-06-14 12:13:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337602242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:23,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:23,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944291580] [2024-06-14 12:13:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:23,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:23,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:23,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 493 transitions, 5317 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:23,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:23,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:23,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:24,915 INFO L124 PetriNetUnfolderBase]: 3974/6089 cut-off events. [2024-06-14 12:13:24,915 INFO L125 PetriNetUnfolderBase]: For 1591677/1591689 co-relation queries the response was YES. [2024-06-14 12:13:24,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57578 conditions, 6089 events. 3974/6089 cut-off events. For 1591677/1591689 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34065 event pairs, 825 based on Foata normal form. 9/6093 useless extension candidates. Maximal degree in co-relation 57396. Up to 6044 conditions per place. [2024-06-14 12:13:24,998 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 479 selfloop transitions, 22 changer transitions 0/504 dead transitions. [2024-06-14 12:13:24,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 504 transitions, 6350 flow [2024-06-14 12:13:24,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 12:13:24,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-14 12:13:24,999 INFO L175 Difference]: Start difference. First operand has 403 places, 493 transitions, 5317 flow. Second operand 8 states and 113 transitions. [2024-06-14 12:13:24,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 504 transitions, 6350 flow [2024-06-14 12:13:27,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 504 transitions, 6114 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:13:27,918 INFO L231 Difference]: Finished difference. Result has 405 places, 493 transitions, 5131 flow [2024-06-14 12:13:27,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5081, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5131, PETRI_PLACES=405, PETRI_TRANSITIONS=493} [2024-06-14 12:13:27,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-14 12:13:27,930 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 493 transitions, 5131 flow [2024-06-14 12:13:27,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:27,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:27,930 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 12:13:27,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:13:27,930 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 12:13:27,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:27,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1735436692, now seen corresponding path program 12 times [2024-06-14 12:13:27,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:27,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793241111] [2024-06-14 12:13:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:27,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:28,779 INFO 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 12:13:28,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793241111] [2024-06-14 12:13:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793241111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:28,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:28,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:28,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6035296] [2024-06-14 12:13:28,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:28,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:28,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:28,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:28,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 493 transitions, 5131 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:28,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:28,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:28,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:30,258 INFO L124 PetriNetUnfolderBase]: 3971/6085 cut-off events. [2024-06-14 12:13:30,259 INFO L125 PetriNetUnfolderBase]: For 1607519/1607531 co-relation queries the response was YES. [2024-06-14 12:13:30,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57430 conditions, 6085 events. 3971/6085 cut-off events. For 1607519/1607531 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34030 event pairs, 821 based on Foata normal form. 9/6089 useless extension candidates. Maximal degree in co-relation 57247. Up to 6019 conditions per place. [2024-06-14 12:13:30,531 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 462 selfloop transitions, 39 changer transitions 0/504 dead transitions. [2024-06-14 12:13:30,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 504 transitions, 6164 flow [2024-06-14 12:13:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-14 12:13:30,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-14 12:13:30,532 INFO L175 Difference]: Start difference. First operand has 405 places, 493 transitions, 5131 flow. Second operand 8 states and 116 transitions. [2024-06-14 12:13:30,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 504 transitions, 6164 flow [2024-06-14 12:13:33,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 504 transitions, 6040 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:33,144 INFO L231 Difference]: Finished difference. Result has 406 places, 493 transitions, 5091 flow [2024-06-14 12:13:33,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5007, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5091, PETRI_PLACES=406, PETRI_TRANSITIONS=493} [2024-06-14 12:13:33,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-14 12:13:33,145 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 493 transitions, 5091 flow [2024-06-14 12:13:33,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:33,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:33,145 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 12:13:33,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:13:33,146 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 12:13:33,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:33,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1735852588, now seen corresponding path program 12 times [2024-06-14 12:13:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561796576] [2024-06-14 12:13:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:33,944 INFO 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 12:13:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561796576] [2024-06-14 12:13:33,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561796576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:33,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:33,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584594527] [2024-06-14 12:13:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:33,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:33,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:33,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:33,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 493 transitions, 5091 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:33,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:33,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:33,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:35,406 INFO L124 PetriNetUnfolderBase]: 3968/6081 cut-off events. [2024-06-14 12:13:35,406 INFO L125 PetriNetUnfolderBase]: For 1623678/1623690 co-relation queries the response was YES. [2024-06-14 12:13:35,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57439 conditions, 6081 events. 3968/6081 cut-off events. For 1623678/1623690 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33974 event pairs, 821 based on Foata normal form. 9/6085 useless extension candidates. Maximal degree in co-relation 57255. Up to 5988 conditions per place. [2024-06-14 12:13:35,503 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 63 changer transitions 0/504 dead transitions. [2024-06-14 12:13:35,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 504 transitions, 6124 flow [2024-06-14 12:13:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:13:35,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-14 12:13:35,504 INFO L175 Difference]: Start difference. First operand has 406 places, 493 transitions, 5091 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:13:35,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 504 transitions, 6124 flow [2024-06-14 12:13:38,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 504 transitions, 5986 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:38,037 INFO L231 Difference]: Finished difference. Result has 406 places, 493 transitions, 5085 flow [2024-06-14 12:13:38,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5085, PETRI_PLACES=406, PETRI_TRANSITIONS=493} [2024-06-14 12:13:38,038 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-14 12:13:38,038 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 493 transitions, 5085 flow [2024-06-14 12:13:38,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:38,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:38,038 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 12:13:38,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:13:38,038 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 12:13:38,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1958451932, now seen corresponding path program 5 times [2024-06-14 12:13:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:38,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875803890] [2024-06-14 12:13:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:38,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:38,843 INFO 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 12:13:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875803890] [2024-06-14 12:13:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875803890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:38,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:38,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340138908] [2024-06-14 12:13:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:38,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:38,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:38,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:38,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 493 transitions, 5085 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:38,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:38,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:38,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:40,510 INFO L124 PetriNetUnfolderBase]: 3988/6107 cut-off events. [2024-06-14 12:13:40,511 INFO L125 PetriNetUnfolderBase]: For 1673810/1673810 co-relation queries the response was YES. [2024-06-14 12:13:40,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57837 conditions, 6107 events. 3988/6107 cut-off events. For 1673810/1673810 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34164 event pairs, 819 based on Foata normal form. 4/6108 useless extension candidates. Maximal degree in co-relation 57652. Up to 6058 conditions per place. [2024-06-14 12:13:40,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 23 changer transitions 0/510 dead transitions. [2024-06-14 12:13:40,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 510 transitions, 6188 flow [2024-06-14 12:13:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-14 12:13:40,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-14 12:13:40,611 INFO L175 Difference]: Start difference. First operand has 406 places, 493 transitions, 5085 flow. Second operand 9 states and 126 transitions. [2024-06-14 12:13:40,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 510 transitions, 6188 flow [2024-06-14 12:13:44,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 510 transitions, 6038 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:44,878 INFO L231 Difference]: Finished difference. Result has 408 places, 496 transitions, 5044 flow [2024-06-14 12:13:44,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4935, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5044, PETRI_PLACES=408, PETRI_TRANSITIONS=496} [2024-06-14 12:13:44,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-14 12:13:44,878 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 496 transitions, 5044 flow [2024-06-14 12:13:44,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:44,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:44,879 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 12:13:44,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:13:44,879 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 12:13:44,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1558182040, now seen corresponding path program 4 times [2024-06-14 12:13:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:44,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432748871] [2024-06-14 12:13:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432748871] [2024-06-14 12:13:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432748871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:45,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:45,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636218812] [2024-06-14 12:13:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:45,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:45,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 496 transitions, 5044 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:45,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:45,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:45,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:47,654 INFO L124 PetriNetUnfolderBase]: 3983/6104 cut-off events. [2024-06-14 12:13:47,654 INFO L125 PetriNetUnfolderBase]: For 1665937/1665946 co-relation queries the response was YES. [2024-06-14 12:13:47,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57659 conditions, 6104 events. 3983/6104 cut-off events. For 1665937/1665946 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34129 event pairs, 834 based on Foata normal form. 5/6102 useless extension candidates. Maximal degree in co-relation 57474. Up to 6007 conditions per place. [2024-06-14 12:13:47,740 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 467 selfloop transitions, 37 changer transitions 0/507 dead transitions. [2024-06-14 12:13:47,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 507 transitions, 6078 flow [2024-06-14 12:13:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:13:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:13:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 12:13:47,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-14 12:13:47,741 INFO L175 Difference]: Start difference. First operand has 408 places, 496 transitions, 5044 flow. Second operand 8 states and 118 transitions. [2024-06-14 12:13:47,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 507 transitions, 6078 flow [2024-06-14 12:13:50,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 507 transitions, 5980 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:51,003 INFO L231 Difference]: Finished difference. Result has 409 places, 496 transitions, 5025 flow [2024-06-14 12:13:51,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4946, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5025, PETRI_PLACES=409, PETRI_TRANSITIONS=496} [2024-06-14 12:13:51,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-14 12:13:51,003 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 496 transitions, 5025 flow [2024-06-14 12:13:51,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:51,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:51,004 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 12:13:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:13:51,004 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 12:13:51,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:51,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1542153002, now seen corresponding path program 6 times [2024-06-14 12:13:51,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:51,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836530379] [2024-06-14 12:13:51,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:51,837 INFO 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 12:13:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836530379] [2024-06-14 12:13:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836530379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:51,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461830696] [2024-06-14 12:13:51,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:51,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:51,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 496 transitions, 5025 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:51,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:51,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:51,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:53,742 INFO L124 PetriNetUnfolderBase]: 4003/6132 cut-off events. [2024-06-14 12:13:53,742 INFO L125 PetriNetUnfolderBase]: For 1708203/1708212 co-relation queries the response was YES. [2024-06-14 12:13:53,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57946 conditions, 6132 events. 4003/6132 cut-off events. For 1708203/1708212 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34290 event pairs, 832 based on Foata normal form. 7/6132 useless extension candidates. Maximal degree in co-relation 57760. Up to 5823 conditions per place. [2024-06-14 12:13:53,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 85 changer transitions 0/519 dead transitions. [2024-06-14 12:13:53,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 519 transitions, 6436 flow [2024-06-14 12:13:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:13:53,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:13:53,828 INFO L175 Difference]: Start difference. First operand has 409 places, 496 transitions, 5025 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:13:53,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 519 transitions, 6436 flow [2024-06-14 12:13:57,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 519 transitions, 6342 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:57,711 INFO L231 Difference]: Finished difference. Result has 411 places, 499 transitions, 5164 flow [2024-06-14 12:13:57,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5164, PETRI_PLACES=411, PETRI_TRANSITIONS=499} [2024-06-14 12:13:57,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-14 12:13:57,726 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 499 transitions, 5164 flow [2024-06-14 12:13:57,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:57,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:57,727 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 12:13:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:13:57,727 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 12:13:57,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1558538912, now seen corresponding path program 7 times [2024-06-14 12:13:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:57,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127554210] [2024-06-14 12:13:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:57,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:58,508 INFO 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 12:13:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:58,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127554210] [2024-06-14 12:13:58,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127554210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:58,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:58,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:58,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391863977] [2024-06-14 12:13:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:58,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:58,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:58,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:58,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:58,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:13:58,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 499 transitions, 5164 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:13:58,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:58,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:13:58,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:00,455 INFO L124 PetriNetUnfolderBase]: 4055/6204 cut-off events. [2024-06-14 12:14:00,456 INFO L125 PetriNetUnfolderBase]: For 1771413/1771422 co-relation queries the response was YES. [2024-06-14 12:14:00,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59412 conditions, 6204 events. 4055/6204 cut-off events. For 1771413/1771422 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34735 event pairs, 838 based on Foata normal form. 7/6204 useless extension candidates. Maximal degree in co-relation 59225. Up to 5863 conditions per place. [2024-06-14 12:14:00,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 88 changer transitions 0/528 dead transitions. [2024-06-14 12:14:00,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 528 transitions, 6938 flow [2024-06-14 12:14:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:14:00,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:14:00,549 INFO L175 Difference]: Start difference. First operand has 411 places, 499 transitions, 5164 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:14:00,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 528 transitions, 6938 flow [2024-06-14 12:14:04,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 528 transitions, 6636 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:04,627 INFO L231 Difference]: Finished difference. Result has 412 places, 505 transitions, 5170 flow [2024-06-14 12:14:04,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4884, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5170, PETRI_PLACES=412, PETRI_TRANSITIONS=505} [2024-06-14 12:14:04,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-14 12:14:04,628 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 505 transitions, 5170 flow [2024-06-14 12:14:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:04,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:04,628 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 12:14:04,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:14:04,629 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 12:14:04,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:04,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1558551002, now seen corresponding path program 8 times [2024-06-14 12:14:04,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:04,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142785775] [2024-06-14 12:14:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:04,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:05,475 INFO 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 12:14:05,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:05,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142785775] [2024-06-14 12:14:05,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142785775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:05,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:05,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:05,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589401683] [2024-06-14 12:14:05,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:05,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:05,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:05,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:05,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 505 transitions, 5170 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:05,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:05,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:05,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:07,442 INFO L124 PetriNetUnfolderBase]: 4043/6188 cut-off events. [2024-06-14 12:14:07,442 INFO L125 PetriNetUnfolderBase]: For 1759597/1759606 co-relation queries the response was YES. [2024-06-14 12:14:07,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58796 conditions, 6188 events. 4043/6188 cut-off events. For 1759597/1759606 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34623 event pairs, 832 based on Foata normal form. 7/6188 useless extension candidates. Maximal degree in co-relation 58608. Up to 5855 conditions per place. [2024-06-14 12:14:07,529 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 89 changer transitions 0/526 dead transitions. [2024-06-14 12:14:07,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 526 transitions, 6546 flow [2024-06-14 12:14:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:14:07,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:14:07,531 INFO L175 Difference]: Start difference. First operand has 412 places, 505 transitions, 5170 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:14:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 526 transitions, 6546 flow [2024-06-14 12:14:11,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 526 transitions, 6330 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:11,545 INFO L231 Difference]: Finished difference. Result has 416 places, 505 transitions, 5138 flow [2024-06-14 12:14:11,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4954, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5138, PETRI_PLACES=416, PETRI_TRANSITIONS=505} [2024-06-14 12:14:11,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-14 12:14:11,555 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 505 transitions, 5138 flow [2024-06-14 12:14:11,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:11,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:11,555 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 12:14:11,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:14:11,556 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 12:14:11,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1142297642, now seen corresponding path program 9 times [2024-06-14 12:14:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:11,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849666078] [2024-06-14 12:14:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:12,355 INFO 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 12:14:12,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:12,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849666078] [2024-06-14 12:14:12,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849666078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:12,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:12,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:12,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442721392] [2024-06-14 12:14:12,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:12,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:12,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:12,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:12,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:12,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 505 transitions, 5138 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:12,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:12,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:14,332 INFO L124 PetriNetUnfolderBase]: 4063/6216 cut-off events. [2024-06-14 12:14:14,333 INFO L125 PetriNetUnfolderBase]: For 1785395/1785404 co-relation queries the response was YES. [2024-06-14 12:14:14,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59010 conditions, 6216 events. 4063/6216 cut-off events. For 1785395/1785404 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 34809 event pairs, 832 based on Foata normal form. 7/6216 useless extension candidates. Maximal degree in co-relation 58821. Up to 5871 conditions per place. [2024-06-14 12:14:14,426 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 96 changer transitions 0/528 dead transitions. [2024-06-14 12:14:14,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 528 transitions, 6577 flow [2024-06-14 12:14:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:14:14,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-14 12:14:14,427 INFO L175 Difference]: Start difference. First operand has 416 places, 505 transitions, 5138 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:14:14,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 528 transitions, 6577 flow [2024-06-14 12:14:18,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 528 transitions, 6385 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:18,544 INFO L231 Difference]: Finished difference. Result has 417 places, 508 transitions, 5205 flow [2024-06-14 12:14:18,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4952, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5205, PETRI_PLACES=417, PETRI_TRANSITIONS=508} [2024-06-14 12:14:18,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 12:14:18,545 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 508 transitions, 5205 flow [2024-06-14 12:14:18,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:18,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:18,545 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 12:14:18,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:14:18,546 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 12:14:18,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:18,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1142309732, now seen corresponding path program 10 times [2024-06-14 12:14:18,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:18,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518525398] [2024-06-14 12:14:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:19,386 INFO 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 12:14:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518525398] [2024-06-14 12:14:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518525398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:19,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:19,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:19,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391625933] [2024-06-14 12:14:19,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:19,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:19,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:14:19,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 508 transitions, 5205 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:19,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:19,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:14:19,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:21,260 INFO L124 PetriNetUnfolderBase]: 4051/6200 cut-off events. [2024-06-14 12:14:21,260 INFO L125 PetriNetUnfolderBase]: For 1774692/1774701 co-relation queries the response was YES. [2024-06-14 12:14:21,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58556 conditions, 6200 events. 4051/6200 cut-off events. For 1774692/1774701 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 34710 event pairs, 836 based on Foata normal form. 7/6200 useless extension candidates. Maximal degree in co-relation 58366. Up to 5863 conditions per place. [2024-06-14 12:14:21,348 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 426 selfloop transitions, 97 changer transitions 0/526 dead transitions. [2024-06-14 12:14:21,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 526 transitions, 6305 flow [2024-06-14 12:14:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:21,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:14:21,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 12:14:21,350 INFO L175 Difference]: Start difference. First operand has 417 places, 508 transitions, 5205 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:14:21,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 526 transitions, 6305 flow [2024-06-14 12:14:26,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 526 transitions, 6018 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-14 12:14:26,068 INFO L231 Difference]: Finished difference. Result has 419 places, 508 transitions, 5118 flow [2024-06-14 12:14:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5118, PETRI_PLACES=419, PETRI_TRANSITIONS=508} [2024-06-14 12:14:26,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-14 12:14:26,068 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 508 transitions, 5118 flow [2024-06-14 12:14:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:26,069 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 12:14:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:14:26,069 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 12:14:26,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash 92489806, now seen corresponding path program 1 times [2024-06-14 12:14:26,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:26,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965362777] [2024-06-14 12:14:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:27,171 INFO 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 12:14:27,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:27,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965362777] [2024-06-14 12:14:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965362777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:27,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:27,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113155388] [2024-06-14 12:14:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:27,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:27,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:27,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:27,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 508 transitions, 5118 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:27,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:27,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:27,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:28,937 INFO L124 PetriNetUnfolderBase]: 3903/6043 cut-off events. [2024-06-14 12:14:28,937 INFO L125 PetriNetUnfolderBase]: For 1529345/1529367 co-relation queries the response was YES. [2024-06-14 12:14:29,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54324 conditions, 6043 events. 3903/6043 cut-off events. For 1529345/1529367 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34679 event pairs, 714 based on Foata normal form. 2/6007 useless extension candidates. Maximal degree in co-relation 54133. Up to 5835 conditions per place. [2024-06-14 12:14:29,035 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 29 changer transitions 0/539 dead transitions. [2024-06-14 12:14:29,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 539 transitions, 6612 flow [2024-06-14 12:14:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:14:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:14:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 12:14:29,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-14 12:14:29,037 INFO L175 Difference]: Start difference. First operand has 419 places, 508 transitions, 5118 flow. Second operand 10 states and 157 transitions. [2024-06-14 12:14:29,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 539 transitions, 6612 flow [2024-06-14 12:14:34,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 539 transitions, 6374 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 12:14:34,724 INFO L231 Difference]: Finished difference. Result has 420 places, 512 transitions, 5083 flow [2024-06-14 12:14:34,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4884, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5083, PETRI_PLACES=420, PETRI_TRANSITIONS=512} [2024-06-14 12:14:34,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-14 12:14:34,725 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 512 transitions, 5083 flow [2024-06-14 12:14:34,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:34,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:34,725 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 12:14:34,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:14:34,726 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 12:14:34,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash 206053966, now seen corresponding path program 2 times [2024-06-14 12:14:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:34,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414211572] [2024-06-14 12:14:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:35,901 INFO 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 12:14:35,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:35,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414211572] [2024-06-14 12:14:35,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414211572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:35,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:35,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:35,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676841068] [2024-06-14 12:14:35,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:35,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:35,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:35,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 512 transitions, 5083 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:35,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:35,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:35,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:37,541 INFO L124 PetriNetUnfolderBase]: 3911/6055 cut-off events. [2024-06-14 12:14:37,541 INFO L125 PetriNetUnfolderBase]: For 1549929/1549951 co-relation queries the response was YES. [2024-06-14 12:14:37,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54151 conditions, 6055 events. 3911/6055 cut-off events. For 1549929/1549951 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34728 event pairs, 753 based on Foata normal form. 2/6019 useless extension candidates. Maximal degree in co-relation 53959. Up to 5878 conditions per place. [2024-06-14 12:14:37,644 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 26 changer transitions 0/536 dead transitions. [2024-06-14 12:14:37,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 536 transitions, 6221 flow [2024-06-14 12:14:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:14:37,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:14:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-14 12:14:37,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-14 12:14:37,645 INFO L175 Difference]: Start difference. First operand has 420 places, 512 transitions, 5083 flow. Second operand 10 states and 152 transitions. [2024-06-14 12:14:37,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 536 transitions, 6221 flow [2024-06-14 12:14:43,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 536 transitions, 6074 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:43,721 INFO L231 Difference]: Finished difference. Result has 424 places, 514 transitions, 5067 flow [2024-06-14 12:14:43,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5067, PETRI_PLACES=424, PETRI_TRANSITIONS=514} [2024-06-14 12:14:43,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-14 12:14:43,722 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 514 transitions, 5067 flow [2024-06-14 12:14:43,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:43,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:43,722 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 12:14:43,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:14:43,722 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 12:14:43,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1466153908, now seen corresponding path program 1 times [2024-06-14 12:14:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:43,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279949746] [2024-06-14 12:14:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:43,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:44,751 INFO 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 12:14:44,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279949746] [2024-06-14 12:14:44,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279949746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:44,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:44,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282262889] [2024-06-14 12:14:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:44,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:44,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:44,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 514 transitions, 5067 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:44,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:44,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:44,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:46,399 INFO L124 PetriNetUnfolderBase]: 3948/6107 cut-off events. [2024-06-14 12:14:46,399 INFO L125 PetriNetUnfolderBase]: For 1601784/1601806 co-relation queries the response was YES. [2024-06-14 12:14:46,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55005 conditions, 6107 events. 3948/6107 cut-off events. For 1601784/1601806 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35084 event pairs, 754 based on Foata normal form. 2/6071 useless extension candidates. Maximal degree in co-relation 54811. Up to 5911 conditions per place. [2024-06-14 12:14:46,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 31 changer transitions 0/545 dead transitions. [2024-06-14 12:14:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 545 transitions, 6565 flow [2024-06-14 12:14:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:14:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:14:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 12:14:46,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-14 12:14:46,499 INFO L175 Difference]: Start difference. First operand has 424 places, 514 transitions, 5067 flow. Second operand 10 states and 158 transitions. [2024-06-14 12:14:46,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 545 transitions, 6565 flow [2024-06-14 12:14:51,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 545 transitions, 6482 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:51,532 INFO L231 Difference]: Finished difference. Result has 426 places, 520 transitions, 5182 flow [2024-06-14 12:14:51,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5182, PETRI_PLACES=426, PETRI_TRANSITIONS=520} [2024-06-14 12:14:51,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-14 12:14:51,533 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 520 transitions, 5182 flow [2024-06-14 12:14:51,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:51,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:51,533 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 12:14:51,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:14:51,533 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 12:14:51,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:51,534 INFO L85 PathProgramCache]: Analyzing trace with hash -152169300, now seen corresponding path program 2 times [2024-06-14 12:14:51,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:51,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309293089] [2024-06-14 12:14:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:51,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:52,816 INFO 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 12:14:52,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309293089] [2024-06-14 12:14:52,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309293089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:52,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:52,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:14:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812218963] [2024-06-14 12:14:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:14:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:14:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:14:52,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:52,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 520 transitions, 5182 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:52,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:52,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:52,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:54,506 INFO L124 PetriNetUnfolderBase]: 3958/6123 cut-off events. [2024-06-14 12:14:54,507 INFO L125 PetriNetUnfolderBase]: For 1627174/1627196 co-relation queries the response was YES. [2024-06-14 12:14:54,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55690 conditions, 6123 events. 3958/6123 cut-off events. For 1627174/1627196 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35182 event pairs, 755 based on Foata normal form. 2/6087 useless extension candidates. Maximal degree in co-relation 55495. Up to 5951 conditions per place. [2024-06-14 12:14:54,608 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 21 changer transitions 0/542 dead transitions. [2024-06-14 12:14:54,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 542 transitions, 6326 flow [2024-06-14 12:14:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 12:14:54,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-14 12:14:54,610 INFO L175 Difference]: Start difference. First operand has 426 places, 520 transitions, 5182 flow. Second operand 9 states and 138 transitions. [2024-06-14 12:14:54,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 542 transitions, 6326 flow [2024-06-14 12:15:00,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 542 transitions, 6213 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:00,372 INFO L231 Difference]: Finished difference. Result has 429 places, 523 transitions, 5191 flow [2024-06-14 12:15:00,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5085, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5191, PETRI_PLACES=429, PETRI_TRANSITIONS=523} [2024-06-14 12:15:00,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-14 12:15:00,373 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 523 transitions, 5191 flow [2024-06-14 12:15:00,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:00,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:00,373 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 12:15:00,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:15:00,373 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 12:15:00,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash 95346766, now seen corresponding path program 3 times [2024-06-14 12:15:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:00,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560395477] [2024-06-14 12:15:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:01,497 INFO 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 12:15:01,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:01,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560395477] [2024-06-14 12:15:01,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560395477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:01,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:01,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423559581] [2024-06-14 12:15:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:01,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:01,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:01,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:01,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:01,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 523 transitions, 5191 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:01,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:01,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:01,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:03,095 INFO L124 PetriNetUnfolderBase]: 3953/6116 cut-off events. [2024-06-14 12:15:03,096 INFO L125 PetriNetUnfolderBase]: For 1629830/1629852 co-relation queries the response was YES. [2024-06-14 12:15:03,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55435 conditions, 6116 events. 3953/6116 cut-off events. For 1629830/1629852 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35148 event pairs, 756 based on Foata normal form. 2/6080 useless extension candidates. Maximal degree in co-relation 55238. Up to 5949 conditions per place. [2024-06-14 12:15:03,198 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 20 changer transitions 0/541 dead transitions. [2024-06-14 12:15:03,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 541 transitions, 6259 flow [2024-06-14 12:15:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 12:15:03,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-14 12:15:03,200 INFO L175 Difference]: Start difference. First operand has 429 places, 523 transitions, 5191 flow. Second operand 9 states and 136 transitions. [2024-06-14 12:15:03,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 541 transitions, 6259 flow [2024-06-14 12:15:08,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 541 transitions, 6149 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:08,540 INFO L231 Difference]: Finished difference. Result has 431 places, 523 transitions, 5126 flow [2024-06-14 12:15:08,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5081, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5126, PETRI_PLACES=431, PETRI_TRANSITIONS=523} [2024-06-14 12:15:08,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-14 12:15:08,541 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 523 transitions, 5126 flow [2024-06-14 12:15:08,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:08,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:08,541 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 12:15:08,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:15:08,542 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 12:15:08,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash 95346890, now seen corresponding path program 3 times [2024-06-14 12:15:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:08,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073044958] [2024-06-14 12:15:08,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:08,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:09,601 INFO 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 12:15:09,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:09,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073044958] [2024-06-14 12:15:09,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073044958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:09,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:09,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:09,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491226230] [2024-06-14 12:15:09,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:09,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:09,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:09,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:09,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 523 transitions, 5126 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:09,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:09,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:09,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:11,288 INFO L124 PetriNetUnfolderBase]: 3947/6108 cut-off events. [2024-06-14 12:15:11,288 INFO L125 PetriNetUnfolderBase]: For 1631855/1631877 co-relation queries the response was YES. [2024-06-14 12:15:11,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55116 conditions, 6108 events. 3947/6108 cut-off events. For 1631855/1631877 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35101 event pairs, 753 based on Foata normal form. 2/6072 useless extension candidates. Maximal degree in co-relation 54918. Up to 5927 conditions per place. [2024-06-14 12:15:11,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 26 changer transitions 0/543 dead transitions. [2024-06-14 12:15:11,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 543 transitions, 6208 flow [2024-06-14 12:15:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:11,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:15:11,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-14 12:15:11,388 INFO L175 Difference]: Start difference. First operand has 431 places, 523 transitions, 5126 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:15:11,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 543 transitions, 6208 flow [2024-06-14 12:15:17,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 543 transitions, 6128 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:15:17,174 INFO L231 Difference]: Finished difference. Result has 432 places, 523 transitions, 5104 flow [2024-06-14 12:15:17,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5104, PETRI_PLACES=432, PETRI_TRANSITIONS=523} [2024-06-14 12:15:17,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-14 12:15:17,174 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 523 transitions, 5104 flow [2024-06-14 12:15:17,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:17,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:17,175 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 12:15:17,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:15:17,175 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 12:15:17,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1043237416, now seen corresponding path program 4 times [2024-06-14 12:15:17,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646064730] [2024-06-14 12:15:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:18,231 INFO 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 12:15:18,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:18,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646064730] [2024-06-14 12:15:18,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646064730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:18,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:18,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638627367] [2024-06-14 12:15:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:18,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:18,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:18,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 523 transitions, 5104 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:18,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:18,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:18,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:19,884 INFO L124 PetriNetUnfolderBase]: 3946/6108 cut-off events. [2024-06-14 12:15:19,884 INFO L125 PetriNetUnfolderBase]: For 1647144/1647166 co-relation queries the response was YES. [2024-06-14 12:15:19,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55096 conditions, 6108 events. 3946/6108 cut-off events. For 1647144/1647166 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35157 event pairs, 754 based on Foata normal form. 2/6072 useless extension candidates. Maximal degree in co-relation 54897. Up to 5840 conditions per place. [2024-06-14 12:15:19,974 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 65 changer transitions 0/549 dead transitions. [2024-06-14 12:15:19,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 549 transitions, 6660 flow [2024-06-14 12:15:19,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:15:19,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-14 12:15:19,976 INFO L175 Difference]: Start difference. First operand has 432 places, 523 transitions, 5104 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:15:19,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 549 transitions, 6660 flow [2024-06-14 12:15:25,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 549 transitions, 6580 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:15:25,051 INFO L231 Difference]: Finished difference. Result has 434 places, 529 transitions, 5359 flow [2024-06-14 12:15:25,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5359, PETRI_PLACES=434, PETRI_TRANSITIONS=529} [2024-06-14 12:15:25,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 12:15:25,052 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 529 transitions, 5359 flow [2024-06-14 12:15:25,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:25,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:25,052 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 12:15:25,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:15:25,052 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 12:15:25,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:25,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1470737878, now seen corresponding path program 5 times [2024-06-14 12:15:25,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:25,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306517037] [2024-06-14 12:15:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:25,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306517037] [2024-06-14 12:15:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306517037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:26,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:26,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:26,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403818210] [2024-06-14 12:15:26,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:26,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:26,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:26,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:26,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:26,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 529 transitions, 5359 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:26,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:26,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:26,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:27,825 INFO L124 PetriNetUnfolderBase]: 3974/6148 cut-off events. [2024-06-14 12:15:27,825 INFO L125 PetriNetUnfolderBase]: For 1696375/1696397 co-relation queries the response was YES. [2024-06-14 12:15:27,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56617 conditions, 6148 events. 3974/6148 cut-off events. For 1696375/1696397 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35457 event pairs, 751 based on Foata normal form. 2/6112 useless extension candidates. Maximal degree in co-relation 56416. Up to 5870 conditions per place. [2024-06-14 12:15:27,926 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 459 selfloop transitions, 67 changer transitions 0/555 dead transitions. [2024-06-14 12:15:27,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 555 transitions, 6901 flow [2024-06-14 12:15:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:15:27,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:15:27,928 INFO L175 Difference]: Start difference. First operand has 434 places, 529 transitions, 5359 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:15:27,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 555 transitions, 6901 flow [2024-06-14 12:15:32,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 555 transitions, 6791 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:32,542 INFO L231 Difference]: Finished difference. Result has 438 places, 535 transitions, 5543 flow [2024-06-14 12:15:32,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5543, PETRI_PLACES=438, PETRI_TRANSITIONS=535} [2024-06-14 12:15:32,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-14 12:15:32,543 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 535 transitions, 5543 flow [2024-06-14 12:15:32,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:32,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:32,543 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 12:15:32,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:15:32,544 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 12:15:32,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:32,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1046915918, now seen corresponding path program 4 times [2024-06-14 12:15:32,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:32,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087293565] [2024-06-14 12:15:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:32,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:33,784 INFO 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 12:15:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:33,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087293565] [2024-06-14 12:15:33,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087293565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:33,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:33,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:33,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726947777] [2024-06-14 12:15:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:33,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:33,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:33,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 535 transitions, 5543 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:33,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:33,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:33,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:35,497 INFO L124 PetriNetUnfolderBase]: 3999/6182 cut-off events. [2024-06-14 12:15:35,497 INFO L125 PetriNetUnfolderBase]: For 1733489/1733511 co-relation queries the response was YES. [2024-06-14 12:15:35,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57697 conditions, 6182 events. 3999/6182 cut-off events. For 1733489/1733511 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35619 event pairs, 767 based on Foata normal form. 2/6146 useless extension candidates. Maximal degree in co-relation 57494. Up to 5998 conditions per place. [2024-06-14 12:15:35,611 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 32 changer transitions 0/552 dead transitions. [2024-06-14 12:15:35,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 552 transitions, 6701 flow [2024-06-14 12:15:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:15:35,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-14 12:15:35,612 INFO L175 Difference]: Start difference. First operand has 438 places, 535 transitions, 5543 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:15:35,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 552 transitions, 6701 flow [2024-06-14 12:15:40,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 552 transitions, 6538 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:40,671 INFO L231 Difference]: Finished difference. Result has 442 places, 537 transitions, 5529 flow [2024-06-14 12:15:40,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5380, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5529, PETRI_PLACES=442, PETRI_TRANSITIONS=537} [2024-06-14 12:15:40,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-14 12:15:40,672 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 537 transitions, 5529 flow [2024-06-14 12:15:40,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:40,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:40,673 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 12:15:40,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:15:40,673 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 12:15:40,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:40,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1043064436, now seen corresponding path program 6 times [2024-06-14 12:15:40,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:40,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591551870] [2024-06-14 12:15:40,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:40,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:41,745 INFO 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 12:15:41,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:41,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591551870] [2024-06-14 12:15:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591551870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:41,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053375186] [2024-06-14 12:15:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:41,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:41,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:41,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 537 transitions, 5529 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:41,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:41,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:41,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:43,457 INFO L124 PetriNetUnfolderBase]: 3985/6164 cut-off events. [2024-06-14 12:15:43,458 INFO L125 PetriNetUnfolderBase]: For 1733166/1733188 co-relation queries the response was YES. [2024-06-14 12:15:43,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 6164 events. 3985/6164 cut-off events. For 1733166/1733188 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35550 event pairs, 754 based on Foata normal form. 2/6128 useless extension candidates. Maximal degree in co-relation 57258. Up to 5896 conditions per place. [2024-06-14 12:15:43,573 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 64 changer transitions 0/558 dead transitions. [2024-06-14 12:15:43,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 558 transitions, 6953 flow [2024-06-14 12:15:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:15:43,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:15:43,575 INFO L175 Difference]: Start difference. First operand has 442 places, 537 transitions, 5529 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:15:43,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 558 transitions, 6953 flow [2024-06-14 12:15:49,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 558 transitions, 6792 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:49,950 INFO L231 Difference]: Finished difference. Result has 444 places, 537 transitions, 5502 flow [2024-06-14 12:15:49,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5502, PETRI_PLACES=444, PETRI_TRANSITIONS=537} [2024-06-14 12:15:49,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-14 12:15:49,951 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 537 transitions, 5502 flow [2024-06-14 12:15:49,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:49,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:49,951 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 12:15:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:15:49,952 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 12:15:49,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:49,952 INFO L85 PathProgramCache]: Analyzing trace with hash 751515688, now seen corresponding path program 7 times [2024-06-14 12:15:49,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:49,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023665589] [2024-06-14 12:15:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:50,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:50,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023665589] [2024-06-14 12:15:50,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023665589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:50,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:50,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:50,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089223488] [2024-06-14 12:15:50,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:50,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:50,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:51,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:51,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 537 transitions, 5502 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:51,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:51,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:51,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:52,680 INFO L124 PetriNetUnfolderBase]: 3984/6164 cut-off events. [2024-06-14 12:15:52,680 INFO L125 PetriNetUnfolderBase]: For 1744625/1744647 co-relation queries the response was YES. [2024-06-14 12:15:52,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57408 conditions, 6164 events. 3984/6164 cut-off events. For 1744625/1744647 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35550 event pairs, 757 based on Foata normal form. 2/6128 useless extension candidates. Maximal degree in co-relation 57202. Up to 5949 conditions per place. [2024-06-14 12:15:52,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 43 changer transitions 0/557 dead transitions. [2024-06-14 12:15:52,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 557 transitions, 6996 flow [2024-06-14 12:15:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:15:52,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 12:15:52,802 INFO L175 Difference]: Start difference. First operand has 444 places, 537 transitions, 5502 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:15:52,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 557 transitions, 6996 flow [2024-06-14 12:15:59,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 557 transitions, 6881 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:59,162 INFO L231 Difference]: Finished difference. Result has 446 places, 540 transitions, 5567 flow [2024-06-14 12:15:59,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5567, PETRI_PLACES=446, PETRI_TRANSITIONS=540} [2024-06-14 12:15:59,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-14 12:15:59,163 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 540 transitions, 5567 flow [2024-06-14 12:15:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:59,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:59,163 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 12:15:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:15:59,164 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 12:15:59,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1208698796, now seen corresponding path program 5 times [2024-06-14 12:15:59,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:59,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63886531] [2024-06-14 12:15:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:59,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:00,363 INFO 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 12:16:00,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:00,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63886531] [2024-06-14 12:16:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63886531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:00,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:00,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487219984] [2024-06-14 12:16:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:00,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:00,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 540 transitions, 5567 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:00,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:00,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:00,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:02,081 INFO L124 PetriNetUnfolderBase]: 3987/6167 cut-off events. [2024-06-14 12:16:02,082 INFO L125 PetriNetUnfolderBase]: For 1745516/1745538 co-relation queries the response was YES. [2024-06-14 12:16:02,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57611 conditions, 6167 events. 3987/6167 cut-off events. For 1745516/1745538 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35556 event pairs, 760 based on Foata normal form. 2/6131 useless extension candidates. Maximal degree in co-relation 57404. Up to 6008 conditions per place. [2024-06-14 12:16:02,185 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 20 changer transitions 0/554 dead transitions. [2024-06-14 12:16:02,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 554 transitions, 6727 flow [2024-06-14 12:16:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 12:16:02,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-14 12:16:02,186 INFO L175 Difference]: Start difference. First operand has 446 places, 540 transitions, 5567 flow. Second operand 9 states and 130 transitions. [2024-06-14 12:16:02,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 554 transitions, 6727 flow [2024-06-14 12:16:08,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 554 transitions, 6517 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:08,080 INFO L231 Difference]: Finished difference. Result has 447 places, 542 transitions, 5488 flow [2024-06-14 12:16:08,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5488, PETRI_PLACES=447, PETRI_TRANSITIONS=542} [2024-06-14 12:16:08,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-14 12:16:08,081 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 542 transitions, 5488 flow [2024-06-14 12:16:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:08,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:08,082 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 12:16:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:16:08,082 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 12:16:08,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1364663060, now seen corresponding path program 8 times [2024-06-14 12:16:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:08,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980367315] [2024-06-14 12:16:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:08,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:09,014 INFO 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 12:16:09,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:09,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980367315] [2024-06-14 12:16:09,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980367315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:09,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801501530] [2024-06-14 12:16:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:09,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:09,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:09,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:09,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 542 transitions, 5488 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:09,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:09,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:09,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:10,922 INFO L124 PetriNetUnfolderBase]: 4000/6187 cut-off events. [2024-06-14 12:16:10,922 INFO L125 PetriNetUnfolderBase]: For 1778018/1778040 co-relation queries the response was YES. [2024-06-14 12:16:10,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58033 conditions, 6187 events. 4000/6187 cut-off events. For 1778018/1778040 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 35715 event pairs, 752 based on Foata normal form. 2/6151 useless extension candidates. Maximal degree in co-relation 57825. Up to 5938 conditions per place. [2024-06-14 12:16:11,021 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 56 changer transitions 0/569 dead transitions. [2024-06-14 12:16:11,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 569 transitions, 7752 flow [2024-06-14 12:16:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:16:11,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:16:11,023 INFO L175 Difference]: Start difference. First operand has 447 places, 542 transitions, 5488 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:16:11,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 569 transitions, 7752 flow [2024-06-14 12:16:16,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 569 transitions, 7637 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:16,230 INFO L231 Difference]: Finished difference. Result has 450 places, 551 transitions, 5766 flow [2024-06-14 12:16:16,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5373, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5766, PETRI_PLACES=450, PETRI_TRANSITIONS=551} [2024-06-14 12:16:16,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-14 12:16:16,231 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 551 transitions, 5766 flow [2024-06-14 12:16:16,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:16,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:16,231 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 12:16:16,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:16:16,232 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 12:16:16,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1364658410, now seen corresponding path program 9 times [2024-06-14 12:16:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:16,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484877237] [2024-06-14 12:16:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:17,153 INFO 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 12:16:17,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484877237] [2024-06-14 12:16:17,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484877237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:17,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:17,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:17,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490089500] [2024-06-14 12:16:17,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:17,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:17,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:17,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:17,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:17,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 551 transitions, 5766 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:17,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:17,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:17,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:18,850 INFO L124 PetriNetUnfolderBase]: 4015/6208 cut-off events. [2024-06-14 12:16:18,850 INFO L125 PetriNetUnfolderBase]: For 1803312/1803334 co-relation queries the response was YES. [2024-06-14 12:16:18,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58898 conditions, 6208 events. 4015/6208 cut-off events. For 1803312/1803334 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 35807 event pairs, 756 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 58688. Up to 5992 conditions per place. [2024-06-14 12:16:18,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 494 selfloop transitions, 48 changer transitions 0/571 dead transitions. [2024-06-14 12:16:18,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 571 transitions, 7588 flow [2024-06-14 12:16:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:16:18,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 12:16:18,948 INFO L175 Difference]: Start difference. First operand has 450 places, 551 transitions, 5766 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:16:18,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 571 transitions, 7588 flow [2024-06-14 12:16:25,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 571 transitions, 7393 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:25,010 INFO L231 Difference]: Finished difference. Result has 456 places, 554 transitions, 5775 flow [2024-06-14 12:16:25,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5611, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5775, PETRI_PLACES=456, PETRI_TRANSITIONS=554} [2024-06-14 12:16:25,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-14 12:16:25,011 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 554 transitions, 5775 flow [2024-06-14 12:16:25,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:25,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:25,011 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 12:16:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:16:25,011 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 12:16:25,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1128006456, now seen corresponding path program 1 times [2024-06-14 12:16:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:25,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7192356] [2024-06-14 12:16:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:26,049 INFO 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 12:16:26,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:26,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7192356] [2024-06-14 12:16:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7192356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:26,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:26,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:26,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313023266] [2024-06-14 12:16:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:26,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:26,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:26,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:26,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:26,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 554 transitions, 5775 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:26,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:26,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:26,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:27,879 INFO L124 PetriNetUnfolderBase]: 4220/6436 cut-off events. [2024-06-14 12:16:27,880 INFO L125 PetriNetUnfolderBase]: For 2120315/2120315 co-relation queries the response was YES. [2024-06-14 12:16:27,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64127 conditions, 6436 events. 4220/6436 cut-off events. For 2120315/2120315 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36176 event pairs, 846 based on Foata normal form. 1/6434 useless extension candidates. Maximal degree in co-relation 63915. Up to 6402 conditions per place. [2024-06-14 12:16:27,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 542 selfloop transitions, 23 changer transitions 0/568 dead transitions. [2024-06-14 12:16:27,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 568 transitions, 6979 flow [2024-06-14 12:16:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-14 12:16:27,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-14 12:16:27,994 INFO L175 Difference]: Start difference. First operand has 456 places, 554 transitions, 5775 flow. Second operand 8 states and 113 transitions. [2024-06-14 12:16:27,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 568 transitions, 6979 flow [2024-06-14 12:16:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 568 transitions, 6831 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:33,654 INFO L231 Difference]: Finished difference. Result has 458 places, 557 transitions, 5735 flow [2024-06-14 12:16:33,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5735, PETRI_PLACES=458, PETRI_TRANSITIONS=557} [2024-06-14 12:16:33,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-14 12:16:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 557 transitions, 5735 flow [2024-06-14 12:16:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:33,655 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 12:16:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:16:33,655 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 12:16:33,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1136584280, now seen corresponding path program 10 times [2024-06-14 12:16:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:33,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724977705] [2024-06-14 12:16:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:34,784 INFO 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 12:16:34,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:34,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724977705] [2024-06-14 12:16:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724977705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:34,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:34,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:34,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172277766] [2024-06-14 12:16:34,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:34,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:34,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:34,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:34,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 557 transitions, 5735 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:34,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:34,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:34,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:36,496 INFO L124 PetriNetUnfolderBase]: 4010/6202 cut-off events. [2024-06-14 12:16:36,496 INFO L125 PetriNetUnfolderBase]: For 1823836/1823858 co-relation queries the response was YES. [2024-06-14 12:16:36,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58358 conditions, 6202 events. 4010/6202 cut-off events. For 1823836/1823858 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35780 event pairs, 761 based on Foata normal form. 3/6167 useless extension candidates. Maximal degree in co-relation 58145. Up to 6017 conditions per place. [2024-06-14 12:16:36,604 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 28 changer transitions 0/574 dead transitions. [2024-06-14 12:16:36,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 574 transitions, 6925 flow [2024-06-14 12:16:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 12:16:36,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-14 12:16:36,605 INFO L175 Difference]: Start difference. First operand has 458 places, 557 transitions, 5735 flow. Second operand 9 states and 133 transitions. [2024-06-14 12:16:36,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 574 transitions, 6925 flow [2024-06-14 12:16:42,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 574 transitions, 6827 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:42,736 INFO L231 Difference]: Finished difference. Result has 459 places, 560 transitions, 5767 flow [2024-06-14 12:16:42,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5767, PETRI_PLACES=459, PETRI_TRANSITIONS=560} [2024-06-14 12:16:42,736 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-14 12:16:42,736 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 560 transitions, 5767 flow [2024-06-14 12:16:42,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:42,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:42,737 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 12:16:42,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:16:42,737 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 12:16:42,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2049376127, now seen corresponding path program 1 times [2024-06-14 12:16:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843503225] [2024-06-14 12:16:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:43,787 INFO 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 12:16:43,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:43,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843503225] [2024-06-14 12:16:43,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843503225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:43,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:43,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619365383] [2024-06-14 12:16:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:43,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:43,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:43,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:43,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:43,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:43,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 560 transitions, 5767 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:43,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:43,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:43,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:45,584 INFO L124 PetriNetUnfolderBase]: 4216/6431 cut-off events. [2024-06-14 12:16:45,584 INFO L125 PetriNetUnfolderBase]: For 2140110/2140110 co-relation queries the response was YES. [2024-06-14 12:16:45,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63838 conditions, 6431 events. 4216/6431 cut-off events. For 2140110/2140110 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36167 event pairs, 839 based on Foata normal form. 1/6429 useless extension candidates. Maximal degree in co-relation 63624. Up to 6278 conditions per place. [2024-06-14 12:16:45,709 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 522 selfloop transitions, 62 changer transitions 0/587 dead transitions. [2024-06-14 12:16:45,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 587 transitions, 7316 flow [2024-06-14 12:16:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:16:45,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-14 12:16:45,710 INFO L175 Difference]: Start difference. First operand has 459 places, 560 transitions, 5767 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:16:45,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 587 transitions, 7316 flow [2024-06-14 12:16:52,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 587 transitions, 7200 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:52,387 INFO L231 Difference]: Finished difference. Result has 460 places, 560 transitions, 5785 flow [2024-06-14 12:16:52,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5785, PETRI_PLACES=460, PETRI_TRANSITIONS=560} [2024-06-14 12:16:52,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 12:16:52,388 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 560 transitions, 5785 flow [2024-06-14 12:16:52,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:52,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:52,388 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 12:16:52,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:16:52,389 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 12:16:52,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2055090047, now seen corresponding path program 2 times [2024-06-14 12:16:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090515464] [2024-06-14 12:16:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090515464] [2024-06-14 12:16:53,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090515464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:53,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515531346] [2024-06-14 12:16:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:53,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:16:53,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 560 transitions, 5785 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:53,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:53,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:16:53,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:55,308 INFO L124 PetriNetUnfolderBase]: 4221/6438 cut-off events. [2024-06-14 12:16:55,308 INFO L125 PetriNetUnfolderBase]: For 2167635/2167635 co-relation queries the response was YES. [2024-06-14 12:16:55,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64048 conditions, 6438 events. 4221/6438 cut-off events. For 2167635/2167635 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 36230 event pairs, 846 based on Foata normal form. 1/6436 useless extension candidates. Maximal degree in co-relation 63833. Up to 6342 conditions per place. [2024-06-14 12:16:55,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 43 changer transitions 0/585 dead transitions. [2024-06-14 12:16:55,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 585 transitions, 7057 flow [2024-06-14 12:16:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:16:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:16:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:16:55,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-14 12:16:55,414 INFO L175 Difference]: Start difference. First operand has 460 places, 560 transitions, 5785 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:16:55,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 585 transitions, 7057 flow [2024-06-14 12:17:02,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 585 transitions, 6879 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:17:02,871 INFO L231 Difference]: Finished difference. Result has 460 places, 563 transitions, 5754 flow [2024-06-14 12:17:02,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5617, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5754, PETRI_PLACES=460, PETRI_TRANSITIONS=563} [2024-06-14 12:17:02,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-14 12:17:02,885 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 563 transitions, 5754 flow [2024-06-14 12:17:02,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:02,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:02,885 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 12:17:02,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:17:02,885 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:02,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 376487570, now seen corresponding path program 1 times [2024-06-14 12:17:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:02,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681892554] [2024-06-14 12:17:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:02,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:03,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:03,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681892554] [2024-06-14 12:17:03,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681892554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:03,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:03,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745724858] [2024-06-14 12:17:03,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:03,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:03,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:03,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:03,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 563 transitions, 5754 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:03,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:03,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:03,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:05,840 INFO L124 PetriNetUnfolderBase]: 4231/6452 cut-off events. [2024-06-14 12:17:05,840 INFO L125 PetriNetUnfolderBase]: For 2180302/2180302 co-relation queries the response was YES. [2024-06-14 12:17:05,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64139 conditions, 6452 events. 4231/6452 cut-off events. For 2180302/2180302 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36360 event pairs, 837 based on Foata normal form. 2/6451 useless extension candidates. Maximal degree in co-relation 63924. Up to 6345 conditions per place. [2024-06-14 12:17:05,963 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 569 selfloop transitions, 25 changer transitions 0/597 dead transitions. [2024-06-14 12:17:05,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 597 transitions, 7125 flow [2024-06-14 12:17:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:17:05,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:17:05,965 INFO L175 Difference]: Start difference. First operand has 460 places, 563 transitions, 5754 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:17:05,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 597 transitions, 7125 flow [2024-06-14 12:17:13,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 597 transitions, 7027 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:13,534 INFO L231 Difference]: Finished difference. Result has 462 places, 566 transitions, 5812 flow [2024-06-14 12:17:13,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5812, PETRI_PLACES=462, PETRI_TRANSITIONS=566} [2024-06-14 12:17:13,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-14 12:17:13,535 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 566 transitions, 5812 flow [2024-06-14 12:17:13,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:13,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:13,535 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 12:17:13,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:17:13,535 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:13,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -979956850, now seen corresponding path program 2 times [2024-06-14 12:17:13,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:13,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9384125] [2024-06-14 12:17:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:14,375 INFO 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 12:17:14,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:14,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9384125] [2024-06-14 12:17:14,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9384125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:14,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:14,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978550119] [2024-06-14 12:17:14,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:14,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:14,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:14,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:14,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:14,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 566 transitions, 5812 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:14,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:14,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:14,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:16,289 INFO L124 PetriNetUnfolderBase]: 4257/6488 cut-off events. [2024-06-14 12:17:16,289 INFO L125 PetriNetUnfolderBase]: For 2207184/2207184 co-relation queries the response was YES. [2024-06-14 12:17:16,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65297 conditions, 6488 events. 4257/6488 cut-off events. For 2207184/2207184 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36513 event pairs, 846 based on Foata normal form. 2/6487 useless extension candidates. Maximal degree in co-relation 65082. Up to 6299 conditions per place. [2024-06-14 12:17:16,417 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 536 selfloop transitions, 62 changer transitions 0/601 dead transitions. [2024-06-14 12:17:16,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 601 transitions, 7597 flow [2024-06-14 12:17:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:16,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:17:16,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:17:16,418 INFO L175 Difference]: Start difference. First operand has 462 places, 566 transitions, 5812 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:17:16,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 601 transitions, 7597 flow [2024-06-14 12:17:22,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 601 transitions, 7449 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:17:22,848 INFO L231 Difference]: Finished difference. Result has 464 places, 572 transitions, 6000 flow [2024-06-14 12:17:22,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=464, PETRI_TRANSITIONS=572} [2024-06-14 12:17:22,848 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-14 12:17:22,848 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 572 transitions, 6000 flow [2024-06-14 12:17:22,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:22,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:22,849 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 12:17:22,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:17:22,849 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:22,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2136337048, now seen corresponding path program 1 times [2024-06-14 12:17:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:22,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34568815] [2024-06-14 12:17:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:22,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:23,747 INFO 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 12:17:23,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:23,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34568815] [2024-06-14 12:17:23,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34568815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:23,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:23,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:23,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883447529] [2024-06-14 12:17:23,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:23,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:23,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:23,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:23,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:23,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:23,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 572 transitions, 6000 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:23,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:23,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:23,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:25,616 INFO L124 PetriNetUnfolderBase]: 4283/6524 cut-off events. [2024-06-14 12:17:25,616 INFO L125 PetriNetUnfolderBase]: For 2264005/2264005 co-relation queries the response was YES. [2024-06-14 12:17:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66340 conditions, 6524 events. 4283/6524 cut-off events. For 2264005/2264005 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36726 event pairs, 829 based on Foata normal form. 2/6523 useless extension candidates. Maximal degree in co-relation 66124. Up to 6300 conditions per place. [2024-06-14 12:17:25,750 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 526 selfloop transitions, 91 changer transitions 0/620 dead transitions. [2024-06-14 12:17:25,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 620 transitions, 7807 flow [2024-06-14 12:17:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:17:25,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:17:25,751 INFO L175 Difference]: Start difference. First operand has 464 places, 572 transitions, 6000 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:17:25,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 620 transitions, 7807 flow [2024-06-14 12:17:32,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 620 transitions, 7623 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-14 12:17:32,988 INFO L231 Difference]: Finished difference. Result has 469 places, 591 transitions, 6221 flow [2024-06-14 12:17:32,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6221, PETRI_PLACES=469, PETRI_TRANSITIONS=591} [2024-06-14 12:17:32,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 12:17:32,988 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 591 transitions, 6221 flow [2024-06-14 12:17:32,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:32,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:32,989 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 12:17:32,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:17:32,989 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:32,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1981261578, now seen corresponding path program 2 times [2024-06-14 12:17:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:32,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970462275] [2024-06-14 12:17:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:32,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:33,817 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 12:17:33,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:33,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970462275] [2024-06-14 12:17:33,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970462275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:33,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:33,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:33,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043623042] [2024-06-14 12:17:33,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:33,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:33,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:33,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:33,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 591 transitions, 6221 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:33,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:33,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:33,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:35,768 INFO L124 PetriNetUnfolderBase]: 4293/6538 cut-off events. [2024-06-14 12:17:35,769 INFO L125 PetriNetUnfolderBase]: For 2294277/2294277 co-relation queries the response was YES. [2024-06-14 12:17:35,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67426 conditions, 6538 events. 4293/6538 cut-off events. For 2294277/2294277 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36782 event pairs, 847 based on Foata normal form. 2/6537 useless extension candidates. Maximal degree in co-relation 67207. Up to 6391 conditions per place. [2024-06-14 12:17:35,887 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 536 selfloop transitions, 79 changer transitions 0/618 dead transitions. [2024-06-14 12:17:35,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 618 transitions, 7581 flow [2024-06-14 12:17:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 12:17:35,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-14 12:17:35,889 INFO L175 Difference]: Start difference. First operand has 469 places, 591 transitions, 6221 flow. Second operand 9 states and 142 transitions. [2024-06-14 12:17:35,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 618 transitions, 7581 flow [2024-06-14 12:17:42,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 618 transitions, 7458 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-14 12:17:42,240 INFO L231 Difference]: Finished difference. Result has 475 places, 595 transitions, 6333 flow [2024-06-14 12:17:42,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6333, PETRI_PLACES=475, PETRI_TRANSITIONS=595} [2024-06-14 12:17:42,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 12:17:42,240 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 595 transitions, 6333 flow [2024-06-14 12:17:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:42,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:42,241 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 12:17:42,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:17:42,241 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:42,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash 803690028, now seen corresponding path program 3 times [2024-06-14 12:17:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:42,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266658026] [2024-06-14 12:17:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:42,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:17:43,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:43,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266658026] [2024-06-14 12:17:43,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266658026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:43,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:43,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802800970] [2024-06-14 12:17:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:43,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:43,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 595 transitions, 6333 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:43,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:43,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:43,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:45,205 INFO L124 PetriNetUnfolderBase]: 4303/6552 cut-off events. [2024-06-14 12:17:45,205 INFO L125 PetriNetUnfolderBase]: For 2322085/2322085 co-relation queries the response was YES. [2024-06-14 12:17:45,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67332 conditions, 6552 events. 4303/6552 cut-off events. For 2322085/2322085 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 36910 event pairs, 843 based on Foata normal form. 2/6551 useless extension candidates. Maximal degree in co-relation 67111. Up to 6391 conditions per place. [2024-06-14 12:17:45,307 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 535 selfloop transitions, 84 changer transitions 0/622 dead transitions. [2024-06-14 12:17:45,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 622 transitions, 7672 flow [2024-06-14 12:17:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:45,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:17:45,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:17:45,308 INFO L175 Difference]: Start difference. First operand has 475 places, 595 transitions, 6333 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:17:45,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 622 transitions, 7672 flow [2024-06-14 12:17:51,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 622 transitions, 7502 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:17:51,258 INFO L231 Difference]: Finished difference. Result has 478 places, 598 transitions, 6375 flow [2024-06-14 12:17:51,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6163, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6375, PETRI_PLACES=478, PETRI_TRANSITIONS=598} [2024-06-14 12:17:51,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-14 12:17:51,258 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 598 transitions, 6375 flow [2024-06-14 12:17:51,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:51,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:17:51,259 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 12:17:51,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:17:51,259 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:17:51,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:17:51,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1981498914, now seen corresponding path program 3 times [2024-06-14 12:17:51,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:17:51,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612570785] [2024-06-14 12:17:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:17:51,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:17:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:17:52,100 INFO 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 12:17:52,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:17:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612570785] [2024-06-14 12:17:52,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612570785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:17:52,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:17:52,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:17:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244506866] [2024-06-14 12:17:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:17:52,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:17:52,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:17:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:17:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:17:52,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:17:52,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 598 transitions, 6375 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:17:52,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:17:52,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:17:52,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:17:53,940 INFO L124 PetriNetUnfolderBase]: 4313/6566 cut-off events. [2024-06-14 12:17:53,940 INFO L125 PetriNetUnfolderBase]: For 2351778/2351778 co-relation queries the response was YES. [2024-06-14 12:17:54,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67701 conditions, 6566 events. 4313/6566 cut-off events. For 2351778/2351778 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36961 event pairs, 844 based on Foata normal form. 2/6565 useless extension candidates. Maximal degree in co-relation 67479. Up to 6465 conditions per place. [2024-06-14 12:17:54,059 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 46 changer transitions 0/625 dead transitions. [2024-06-14 12:17:54,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 625 transitions, 7762 flow [2024-06-14 12:17:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:17:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:17:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:17:54,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-14 12:17:54,060 INFO L175 Difference]: Start difference. First operand has 478 places, 598 transitions, 6375 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:17:54,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 625 transitions, 7762 flow [2024-06-14 12:18:00,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 625 transitions, 7578 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:00,464 INFO L231 Difference]: Finished difference. Result has 480 places, 601 transitions, 6369 flow [2024-06-14 12:18:00,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6191, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6369, PETRI_PLACES=480, PETRI_TRANSITIONS=601} [2024-06-14 12:18:00,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-14 12:18:00,464 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 601 transitions, 6369 flow [2024-06-14 12:18:00,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:00,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:00,465 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 12:18:00,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:18:00,465 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:00,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1068614680, now seen corresponding path program 1 times [2024-06-14 12:18:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:00,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630486722] [2024-06-14 12:18:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:01,513 INFO 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 12:18:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:01,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630486722] [2024-06-14 12:18:01,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630486722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:01,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:01,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983888535] [2024-06-14 12:18:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:01,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:01,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:01,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 601 transitions, 6369 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 12:18:01,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:01,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:01,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:03,493 INFO L124 PetriNetUnfolderBase]: 4321/6578 cut-off events. [2024-06-14 12:18:03,493 INFO L125 PetriNetUnfolderBase]: For 2381210/2381210 co-relation queries the response was YES. [2024-06-14 12:18:03,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67898 conditions, 6578 events. 4321/6578 cut-off events. For 2381210/2381210 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37002 event pairs, 718 based on Foata normal form. 2/6577 useless extension candidates. Maximal degree in co-relation 67675. Up to 6342 conditions per place. [2024-06-14 12:18:03,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 79 changer transitions 0/634 dead transitions. [2024-06-14 12:18:03,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 634 transitions, 8104 flow [2024-06-14 12:18:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:18:03,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:18:03,617 INFO L175 Difference]: Start difference. First operand has 480 places, 601 transitions, 6369 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:18:03,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 634 transitions, 8104 flow [2024-06-14 12:18:10,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 634 transitions, 7954 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:10,189 INFO L231 Difference]: Finished difference. Result has 482 places, 605 transitions, 6466 flow [2024-06-14 12:18:10,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6466, PETRI_PLACES=482, PETRI_TRANSITIONS=605} [2024-06-14 12:18:10,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-14 12:18:10,189 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 605 transitions, 6466 flow [2024-06-14 12:18:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 12:18:10,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:10,190 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 12:18:10,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:18:10,190 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:10,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1061205370, now seen corresponding path program 2 times [2024-06-14 12:18:10,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:10,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963534651] [2024-06-14 12:18:10,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:10,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:11,182 INFO 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 12:18:11,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:11,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963534651] [2024-06-14 12:18:11,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963534651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:11,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:11,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:11,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64827194] [2024-06-14 12:18:11,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:11,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:11,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:11,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 605 transitions, 6466 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 12:18:11,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:11,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:11,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:13,115 INFO L124 PetriNetUnfolderBase]: 4342/6609 cut-off events. [2024-06-14 12:18:13,116 INFO L125 PetriNetUnfolderBase]: For 2437199/2437199 co-relation queries the response was YES. [2024-06-14 12:18:13,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68798 conditions, 6609 events. 4342/6609 cut-off events. For 2437199/2437199 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 37266 event pairs, 848 based on Foata normal form. 2/6608 useless extension candidates. Maximal degree in co-relation 68574. Up to 6445 conditions per place. [2024-06-14 12:18:13,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 555 selfloop transitions, 76 changer transitions 0/634 dead transitions. [2024-06-14 12:18:13,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 634 transitions, 8201 flow [2024-06-14 12:18:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 12:18:13,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-14 12:18:13,443 INFO L175 Difference]: Start difference. First operand has 482 places, 605 transitions, 6466 flow. Second operand 9 states and 145 transitions. [2024-06-14 12:18:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 634 transitions, 8201 flow [2024-06-14 12:18:19,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 634 transitions, 8023 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:19,507 INFO L231 Difference]: Finished difference. Result has 486 places, 609 transitions, 6537 flow [2024-06-14 12:18:19,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6537, PETRI_PLACES=486, PETRI_TRANSITIONS=609} [2024-06-14 12:18:19,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-14 12:18:19,508 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 609 transitions, 6537 flow [2024-06-14 12:18:19,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 12:18:19,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:19,508 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 12:18:19,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:18:19,508 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:19,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1061196070, now seen corresponding path program 3 times [2024-06-14 12:18:19,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:19,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849969462] [2024-06-14 12:18:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:20,552 INFO 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 12:18:20,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:20,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849969462] [2024-06-14 12:18:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849969462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:20,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:20,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:20,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564354006] [2024-06-14 12:18:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:20,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:20,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:20,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:20,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:20,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:20,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 609 transitions, 6537 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 12:18:20,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:20,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:20,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:22,632 INFO L124 PetriNetUnfolderBase]: 4337/6602 cut-off events. [2024-06-14 12:18:22,632 INFO L125 PetriNetUnfolderBase]: For 2440379/2440379 co-relation queries the response was YES. [2024-06-14 12:18:22,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68573 conditions, 6602 events. 4337/6602 cut-off events. For 2440379/2440379 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 37205 event pairs, 849 based on Foata normal form. 2/6601 useless extension candidates. Maximal degree in co-relation 68347. Up to 6455 conditions per place. [2024-06-14 12:18:22,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 555 selfloop transitions, 74 changer transitions 0/632 dead transitions. [2024-06-14 12:18:22,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 632 transitions, 7858 flow [2024-06-14 12:18:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:18:22,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-14 12:18:22,752 INFO L175 Difference]: Start difference. First operand has 486 places, 609 transitions, 6537 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:18:22,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 632 transitions, 7858 flow [2024-06-14 12:18:29,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 632 transitions, 7745 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:18:29,753 INFO L231 Difference]: Finished difference. Result has 490 places, 609 transitions, 6577 flow [2024-06-14 12:18:29,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6577, PETRI_PLACES=490, PETRI_TRANSITIONS=609} [2024-06-14 12:18:29,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-14 12:18:29,754 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 609 transitions, 6577 flow [2024-06-14 12:18:29,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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 12:18:29,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:29,754 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 12:18:29,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:18:29,755 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:29,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:29,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1701017846, now seen corresponding path program 4 times [2024-06-14 12:18:29,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:29,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300870410] [2024-06-14 12:18:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:18:30,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:30,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300870410] [2024-06-14 12:18:30,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300870410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:30,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:30,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:30,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286676387] [2024-06-14 12:18:30,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:30,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:30,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:30,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 609 transitions, 6577 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:30,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:30,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:30,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:32,682 INFO L124 PetriNetUnfolderBase]: 4347/6616 cut-off events. [2024-06-14 12:18:32,682 INFO L125 PetriNetUnfolderBase]: For 2471304/2471304 co-relation queries the response was YES. [2024-06-14 12:18:32,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69062 conditions, 6616 events. 4347/6616 cut-off events. For 2471304/2471304 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37338 event pairs, 822 based on Foata normal form. 2/6615 useless extension candidates. Maximal degree in co-relation 68834. Up to 6339 conditions per place. [2024-06-14 12:18:32,805 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 591 selfloop transitions, 47 changer transitions 0/641 dead transitions. [2024-06-14 12:18:32,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 641 transitions, 8041 flow [2024-06-14 12:18:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:18:32,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-14 12:18:32,806 INFO L175 Difference]: Start difference. First operand has 490 places, 609 transitions, 6577 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:18:32,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 641 transitions, 8041 flow [2024-06-14 12:18:41,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 641 transitions, 7888 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:18:41,752 INFO L231 Difference]: Finished difference. Result has 491 places, 612 transitions, 6638 flow [2024-06-14 12:18:41,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6638, PETRI_PLACES=491, PETRI_TRANSITIONS=612} [2024-06-14 12:18:41,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-14 12:18:41,753 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 612 transitions, 6638 flow [2024-06-14 12:18:41,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:41,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:41,753 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 12:18:41,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:18:41,753 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:41,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:41,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1415395836, now seen corresponding path program 5 times [2024-06-14 12:18:41,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:41,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736957288] [2024-06-14 12:18:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:41,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:42,605 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 12:18:42,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:42,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736957288] [2024-06-14 12:18:42,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736957288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:42,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:42,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:42,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733694468] [2024-06-14 12:18:42,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:42,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:42,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:42,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:42,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 612 transitions, 6638 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:42,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:42,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:44,647 INFO L124 PetriNetUnfolderBase]: 4882/7383 cut-off events. [2024-06-14 12:18:44,647 INFO L125 PetriNetUnfolderBase]: For 2715557/2715557 co-relation queries the response was YES. [2024-06-14 12:18:44,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78398 conditions, 7383 events. 4882/7383 cut-off events. For 2715557/2715557 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 41873 event pairs, 867 based on Foata normal form. 2/7376 useless extension candidates. Maximal degree in co-relation 78169. Up to 6756 conditions per place. [2024-06-14 12:18:45,014 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 637 selfloop transitions, 135 changer transitions 0/775 dead transitions. [2024-06-14 12:18:45,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 775 transitions, 11380 flow [2024-06-14 12:18:45,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:18:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:18:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 12:18:45,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-14 12:18:45,015 INFO L175 Difference]: Start difference. First operand has 491 places, 612 transitions, 6638 flow. Second operand 10 states and 166 transitions. [2024-06-14 12:18:45,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 775 transitions, 11380 flow [2024-06-14 12:18:50,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 775 transitions, 10984 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-14 12:18:50,874 INFO L231 Difference]: Finished difference. Result has 497 places, 705 transitions, 8441 flow [2024-06-14 12:18:50,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8441, PETRI_PLACES=497, PETRI_TRANSITIONS=705} [2024-06-14 12:18:50,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 12:18:50,875 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 705 transitions, 8441 flow [2024-06-14 12:18:50,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:50,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:18:50,875 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 12:18:50,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:18:50,875 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:18:50,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:18:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1415396022, now seen corresponding path program 4 times [2024-06-14 12:18:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:18:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348461161] [2024-06-14 12:18:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:18:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:18:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:18:51,770 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 12:18:51,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:18:51,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348461161] [2024-06-14 12:18:51,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348461161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:18:51,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:18:51,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:18:51,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493384317] [2024-06-14 12:18:51,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:18:51,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:18:51,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:18:51,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:18:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:18:51,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:18:51,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 705 transitions, 8441 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:18:51,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:18:51,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:18:51,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:18:54,070 INFO L124 PetriNetUnfolderBase]: 4916/7430 cut-off events. [2024-06-14 12:18:54,070 INFO L125 PetriNetUnfolderBase]: For 2795329/2795329 co-relation queries the response was YES. [2024-06-14 12:18:54,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80380 conditions, 7430 events. 4916/7430 cut-off events. For 2795329/2795329 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 42221 event pairs, 867 based on Foata normal form. 2/7429 useless extension candidates. Maximal degree in co-relation 80148. Up to 6827 conditions per place. [2024-06-14 12:18:54,211 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 569 selfloop transitions, 170 changer transitions 0/742 dead transitions. [2024-06-14 12:18:54,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 742 transitions, 10833 flow [2024-06-14 12:18:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:18:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:18:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:18:54,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:18:54,212 INFO L175 Difference]: Start difference. First operand has 497 places, 705 transitions, 8441 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:18:54,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 742 transitions, 10833 flow [2024-06-14 12:19:02,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 742 transitions, 10579 flow, removed 124 selfloop flow, removed 2 redundant places. [2024-06-14 12:19:02,992 INFO L231 Difference]: Finished difference. Result has 504 places, 714 transitions, 8726 flow [2024-06-14 12:19:02,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8187, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8726, PETRI_PLACES=504, PETRI_TRANSITIONS=714} [2024-06-14 12:19:02,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-14 12:19:02,993 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 714 transitions, 8726 flow [2024-06-14 12:19:02,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:02,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:02,993 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 12:19:02,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 12:19:02,994 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:02,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1420638246, now seen corresponding path program 6 times [2024-06-14 12:19:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886169436] [2024-06-14 12:19:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:03,845 INFO 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 12:19:03,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:03,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886169436] [2024-06-14 12:19:03,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886169436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:03,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:03,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222589092] [2024-06-14 12:19:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:03,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:03,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:03,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:03,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 714 transitions, 8726 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:03,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:03,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:03,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:06,239 INFO L124 PetriNetUnfolderBase]: 5052/7618 cut-off events. [2024-06-14 12:19:06,240 INFO L125 PetriNetUnfolderBase]: For 3077513/3077513 co-relation queries the response was YES. [2024-06-14 12:19:06,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85266 conditions, 7618 events. 5052/7618 cut-off events. For 3077513/3077513 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 43265 event pairs, 839 based on Foata normal form. 8/7623 useless extension candidates. Maximal degree in co-relation 85032. Up to 6913 conditions per place. [2024-06-14 12:19:06,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 664 selfloop transitions, 104 changer transitions 0/771 dead transitions. [2024-06-14 12:19:06,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 771 transitions, 11726 flow [2024-06-14 12:19:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:19:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:19:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-14 12:19:06,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-14 12:19:06,398 INFO L175 Difference]: Start difference. First operand has 504 places, 714 transitions, 8726 flow. Second operand 11 states and 177 transitions. [2024-06-14 12:19:06,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 771 transitions, 11726 flow [2024-06-14 12:19:15,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 771 transitions, 11452 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-14 12:19:15,532 INFO L231 Difference]: Finished difference. Result has 513 places, 734 transitions, 9367 flow [2024-06-14 12:19:15,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8452, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9367, PETRI_PLACES=513, PETRI_TRANSITIONS=734} [2024-06-14 12:19:15,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-14 12:19:15,533 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 734 transitions, 9367 flow [2024-06-14 12:19:15,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:15,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:15,533 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 12:19:15,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 12:19:15,534 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:15,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:15,534 INFO L85 PathProgramCache]: Analyzing trace with hash 912726979, now seen corresponding path program 1 times [2024-06-14 12:19:15,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:15,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544261638] [2024-06-14 12:19:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:16,933 INFO 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 12:19:16,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544261638] [2024-06-14 12:19:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544261638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:16,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:16,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582687218] [2024-06-14 12:19:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:16,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:16,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:17,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:17,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 734 transitions, 9367 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:17,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:17,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:17,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:19,633 INFO L124 PetriNetUnfolderBase]: 5046/7606 cut-off events. [2024-06-14 12:19:19,634 INFO L125 PetriNetUnfolderBase]: For 3014376/3014384 co-relation queries the response was YES. [2024-06-14 12:19:19,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86240 conditions, 7606 events. 5046/7606 cut-off events. For 3014376/3014384 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 43191 event pairs, 907 based on Foata normal form. 10/7613 useless extension candidates. Maximal degree in co-relation 86002. Up to 7501 conditions per place. [2024-06-14 12:19:19,765 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 728 selfloop transitions, 34 changer transitions 0/765 dead transitions. [2024-06-14 12:19:19,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 765 transitions, 11097 flow [2024-06-14 12:19:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:19:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:19:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-14 12:19:19,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-14 12:19:19,767 INFO L175 Difference]: Start difference. First operand has 513 places, 734 transitions, 9367 flow. Second operand 10 states and 148 transitions. [2024-06-14 12:19:19,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 765 transitions, 11097 flow [2024-06-14 12:19:27,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 765 transitions, 10702 flow, removed 154 selfloop flow, removed 6 redundant places. [2024-06-14 12:19:27,210 INFO L231 Difference]: Finished difference. Result has 517 places, 738 transitions, 9190 flow [2024-06-14 12:19:27,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9190, PETRI_PLACES=517, PETRI_TRANSITIONS=738} [2024-06-14 12:19:27,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-14 12:19:27,211 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 738 transitions, 9190 flow [2024-06-14 12:19:27,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:27,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:27,211 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 12:19:27,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 12:19:27,211 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:27,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:27,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1695356564, now seen corresponding path program 1 times [2024-06-14 12:19:27,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:27,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549782244] [2024-06-14 12:19:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:28,120 INFO 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 12:19:28,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:28,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549782244] [2024-06-14 12:19:28,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549782244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:28,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:28,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:28,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940515074] [2024-06-14 12:19:28,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:28,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:28,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:28,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:28,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:28,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 738 transitions, 9190 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:28,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:28,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:28,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:30,724 INFO L124 PetriNetUnfolderBase]: 5051/7613 cut-off events. [2024-06-14 12:19:30,724 INFO L125 PetriNetUnfolderBase]: For 3025414/3025422 co-relation queries the response was YES. [2024-06-14 12:19:30,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85728 conditions, 7613 events. 5051/7613 cut-off events. For 3025414/3025422 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43245 event pairs, 906 based on Foata normal form. 9/7619 useless extension candidates. Maximal degree in co-relation 85488. Up to 7531 conditions per place. [2024-06-14 12:19:30,964 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 735 selfloop transitions, 26 changer transitions 0/764 dead transitions. [2024-06-14 12:19:30,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 764 transitions, 10876 flow [2024-06-14 12:19:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-14 12:19:30,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-14 12:19:30,966 INFO L175 Difference]: Start difference. First operand has 517 places, 738 transitions, 9190 flow. Second operand 9 states and 134 transitions. [2024-06-14 12:19:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 764 transitions, 10876 flow [2024-06-14 12:19:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 764 transitions, 10714 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-14 12:19:38,500 INFO L231 Difference]: Finished difference. Result has 518 places, 741 transitions, 9193 flow [2024-06-14 12:19:38,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9193, PETRI_PLACES=518, PETRI_TRANSITIONS=741} [2024-06-14 12:19:38,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-14 12:19:38,501 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 741 transitions, 9193 flow [2024-06-14 12:19:38,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:38,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:38,501 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 12:19:38,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 12:19:38,501 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:38,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1695356936, now seen corresponding path program 7 times [2024-06-14 12:19:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:38,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034548421] [2024-06-14 12:19:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:39,402 INFO 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 12:19:39,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:39,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034548421] [2024-06-14 12:19:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034548421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:39,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:39,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825038325] [2024-06-14 12:19:39,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:39,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:39,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:39,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 741 transitions, 9193 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:39,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:39,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:39,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:42,185 INFO L124 PetriNetUnfolderBase]: 5027/7585 cut-off events. [2024-06-14 12:19:42,185 INFO L125 PetriNetUnfolderBase]: For 3049731/3049731 co-relation queries the response was YES. [2024-06-14 12:19:42,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84463 conditions, 7585 events. 5027/7585 cut-off events. For 3049731/3049731 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 43105 event pairs, 852 based on Foata normal form. 8/7590 useless extension candidates. Maximal degree in co-relation 84222. Up to 6900 conditions per place. [2024-06-14 12:19:42,315 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 667 selfloop transitions, 100 changer transitions 0/770 dead transitions. [2024-06-14 12:19:42,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 770 transitions, 11231 flow [2024-06-14 12:19:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:19:42,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:19:42,316 INFO L175 Difference]: Start difference. First operand has 518 places, 741 transitions, 9193 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:19:42,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 770 transitions, 11231 flow [2024-06-14 12:19:50,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 770 transitions, 10946 flow, removed 119 selfloop flow, removed 7 redundant places. [2024-06-14 12:19:50,725 INFO L231 Difference]: Finished difference. Result has 520 places, 741 transitions, 9122 flow [2024-06-14 12:19:50,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8908, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9122, PETRI_PLACES=520, PETRI_TRANSITIONS=741} [2024-06-14 12:19:50,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-14 12:19:50,726 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 741 transitions, 9122 flow [2024-06-14 12:19:50,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:50,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:19:50,726 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 12:19:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 12:19:50,726 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:19:50,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:19:50,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1424650266, now seen corresponding path program 8 times [2024-06-14 12:19:50,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:19:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363668372] [2024-06-14 12:19:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:19:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:19:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:19:51,595 INFO 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 12:19:51,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:19:51,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363668372] [2024-06-14 12:19:51,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363668372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:19:51,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:19:51,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:19:51,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133143314] [2024-06-14 12:19:51,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:19:51,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:19:51,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:19:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:19:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:19:51,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:19:51,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 741 transitions, 9122 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:19:51,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:19:51,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:19:51,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:19:54,387 INFO L124 PetriNetUnfolderBase]: 5223/7855 cut-off events. [2024-06-14 12:19:54,388 INFO L125 PetriNetUnfolderBase]: For 3348547/3348547 co-relation queries the response was YES. [2024-06-14 12:19:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92217 conditions, 7855 events. 5223/7855 cut-off events. For 3348547/3348547 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44613 event pairs, 871 based on Foata normal form. 4/7856 useless extension candidates. Maximal degree in co-relation 91975. Up to 6659 conditions per place. [2024-06-14 12:19:54,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 565 selfloop transitions, 228 changer transitions 0/796 dead transitions. [2024-06-14 12:19:54,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 796 transitions, 12812 flow [2024-06-14 12:19:54,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:19:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:19:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:19:54,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-14 12:19:54,659 INFO L175 Difference]: Start difference. First operand has 520 places, 741 transitions, 9122 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:19:54,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 796 transitions, 12812 flow [2024-06-14 12:20:05,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 796 transitions, 12612 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:20:05,036 INFO L231 Difference]: Finished difference. Result has 523 places, 766 transitions, 10360 flow [2024-06-14 12:20:05,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8922, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10360, PETRI_PLACES=523, PETRI_TRANSITIONS=766} [2024-06-14 12:20:05,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-14 12:20:05,037 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 766 transitions, 10360 flow [2024-06-14 12:20:05,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:05,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:05,037 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 12:20:05,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 12:20:05,037 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:05,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1424650452, now seen corresponding path program 5 times [2024-06-14 12:20:05,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:05,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339044633] [2024-06-14 12:20:05,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:05,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:05,867 INFO 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 12:20:05,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:05,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339044633] [2024-06-14 12:20:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339044633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:05,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:05,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:05,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464221629] [2024-06-14 12:20:05,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:05,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:05,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:05,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:05,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 766 transitions, 10360 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:05,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:05,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:05,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:08,851 INFO L124 PetriNetUnfolderBase]: 5257/7902 cut-off events. [2024-06-14 12:20:08,851 INFO L125 PetriNetUnfolderBase]: For 3417102/3417102 co-relation queries the response was YES. [2024-06-14 12:20:08,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94811 conditions, 7902 events. 5257/7902 cut-off events. For 3417102/3417102 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 44913 event pairs, 869 based on Foata normal form. 2/7901 useless extension candidates. Maximal degree in co-relation 94566. Up to 7286 conditions per place. [2024-06-14 12:20:09,000 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 172 changer transitions 0/801 dead transitions. [2024-06-14 12:20:09,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 801 transitions, 13138 flow [2024-06-14 12:20:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:20:09,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:20:09,014 INFO L175 Difference]: Start difference. First operand has 523 places, 766 transitions, 10360 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:20:09,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 801 transitions, 13138 flow [2024-06-14 12:20:18,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 801 transitions, 12762 flow, removed 162 selfloop flow, removed 3 redundant places. [2024-06-14 12:20:18,280 INFO L231 Difference]: Finished difference. Result has 529 places, 775 transitions, 10433 flow [2024-06-14 12:20:18,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9984, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10433, PETRI_PLACES=529, PETRI_TRANSITIONS=775} [2024-06-14 12:20:18,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 486 predicate places. [2024-06-14 12:20:18,281 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 775 transitions, 10433 flow [2024-06-14 12:20:18,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:18,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:18,281 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 12:20:18,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 12:20:18,282 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:18,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1691637494, now seen corresponding path program 2 times [2024-06-14 12:20:18,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:18,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863873645] [2024-06-14 12:20:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:18,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:19,207 INFO 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 12:20:19,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863873645] [2024-06-14 12:20:19,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863873645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:19,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:19,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:19,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416701642] [2024-06-14 12:20:19,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:19,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:19,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:19,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:19,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 775 transitions, 10433 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:19,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:19,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:19,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:22,204 INFO L124 PetriNetUnfolderBase]: 5278/7927 cut-off events. [2024-06-14 12:20:22,204 INFO L125 PetriNetUnfolderBase]: For 3457219/3457227 co-relation queries the response was YES. [2024-06-14 12:20:22,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95023 conditions, 7927 events. 5278/7927 cut-off events. For 3457219/3457227 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 45071 event pairs, 917 based on Foata normal form. 9/7933 useless extension candidates. Maximal degree in co-relation 94776. Up to 7740 conditions per place. [2024-06-14 12:20:22,350 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 725 selfloop transitions, 78 changer transitions 0/806 dead transitions. [2024-06-14 12:20:22,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 806 transitions, 13115 flow [2024-06-14 12:20:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:20:22,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-14 12:20:22,352 INFO L175 Difference]: Start difference. First operand has 529 places, 775 transitions, 10433 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:20:22,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 806 transitions, 13115 flow [2024-06-14 12:20:34,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 806 transitions, 12894 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:34,697 INFO L231 Difference]: Finished difference. Result has 534 places, 784 transitions, 10717 flow [2024-06-14 12:20:34,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10212, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10717, PETRI_PLACES=534, PETRI_TRANSITIONS=784} [2024-06-14 12:20:34,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-14 12:20:34,698 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 784 transitions, 10717 flow [2024-06-14 12:20:34,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:34,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:34,698 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 12:20:34,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 12:20:34,698 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:34,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash -628241877, now seen corresponding path program 2 times [2024-06-14 12:20:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:34,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371140025] [2024-06-14 12:20:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:34,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:35,872 INFO 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 12:20:35,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:35,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371140025] [2024-06-14 12:20:35,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371140025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:35,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:35,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:35,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627938827] [2024-06-14 12:20:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:35,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:35,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:35,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:35,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 784 transitions, 10717 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:35,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:35,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:35,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:38,805 INFO L124 PetriNetUnfolderBase]: 5272/7919 cut-off events. [2024-06-14 12:20:38,806 INFO L125 PetriNetUnfolderBase]: For 3485926/3485934 co-relation queries the response was YES. [2024-06-14 12:20:38,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94874 conditions, 7919 events. 5272/7919 cut-off events. For 3485926/3485934 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45024 event pairs, 914 based on Foata normal form. 10/7926 useless extension candidates. Maximal degree in co-relation 94626. Up to 7794 conditions per place. [2024-06-14 12:20:38,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 744 selfloop transitions, 61 changer transitions 0/808 dead transitions. [2024-06-14 12:20:38,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 808 transitions, 12499 flow [2024-06-14 12:20:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-14 12:20:38,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-14 12:20:38,977 INFO L175 Difference]: Start difference. First operand has 534 places, 784 transitions, 10717 flow. Second operand 9 states and 136 transitions. [2024-06-14 12:20:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 808 transitions, 12499 flow [2024-06-14 12:20:51,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 808 transitions, 12279 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-06-14 12:20:51,371 INFO L231 Difference]: Finished difference. Result has 539 places, 788 transitions, 10752 flow [2024-06-14 12:20:51,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10497, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10752, PETRI_PLACES=539, PETRI_TRANSITIONS=788} [2024-06-14 12:20:51,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-14 12:20:51,372 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 788 transitions, 10752 flow [2024-06-14 12:20:51,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:51,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:20:51,373 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 12:20:51,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 12:20:51,373 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:20:51,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:20:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1424655846, now seen corresponding path program 9 times [2024-06-14 12:20:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:20:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211508511] [2024-06-14 12:20:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:20:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:20:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:20:52,284 INFO 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 12:20:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:20:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211508511] [2024-06-14 12:20:52,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211508511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:20:52,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:20:52,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:20:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505875303] [2024-06-14 12:20:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:20:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:20:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:20:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:20:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:20:52,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-14 12:20:52,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 788 transitions, 10752 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:20:52,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:20:52,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-14 12:20:52,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:20:55,230 INFO L124 PetriNetUnfolderBase]: 5248/7891 cut-off events. [2024-06-14 12:20:55,230 INFO L125 PetriNetUnfolderBase]: For 3493542/3493542 co-relation queries the response was YES. [2024-06-14 12:20:55,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93368 conditions, 7891 events. 5248/7891 cut-off events. For 3493542/3493542 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44828 event pairs, 869 based on Foata normal form. 8/7896 useless extension candidates. Maximal degree in co-relation 93118. Up to 6715 conditions per place. [2024-06-14 12:20:55,387 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 590 selfloop transitions, 227 changer transitions 0/820 dead transitions. [2024-06-14 12:20:55,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 820 transitions, 13792 flow [2024-06-14 12:20:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:20:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:20:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:20:55,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-14 12:20:55,392 INFO L175 Difference]: Start difference. First operand has 539 places, 788 transitions, 10752 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:20:55,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 820 transitions, 13792 flow Killed by 15