./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 bcb38a6f 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-bcb38a6-m [2024-06-04 14:53:07,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:53:07,583 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:53:07,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:53:07,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:53:07,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:53:07,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:53:07,614 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:53:07,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:53:07,618 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:53:07,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:53:07,619 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:53:07,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:53:07,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:53:07,621 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:53:07,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:53:07,621 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:53:07,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:53:07,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:53:07,622 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:53:07,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:53:07,623 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:53:07,623 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:53:07,624 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:53:07,624 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:53:07,624 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:53:07,624 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:53:07,625 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:53:07,625 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:53:07,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:53:07,626 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:53:07,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:53:07,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:53:07,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:53:07,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:53:07,627 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:53:07,627 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:53:07,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:53:07,627 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:53:07,628 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:53:07,628 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:53:07,628 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:53:07,628 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:53:07,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:53:07,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:53:07,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:53:07,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:53:07,834 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:53:07,836 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:53:07,836 INFO L431 ainManager$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 [2024-06-04 14:53:07,988 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:53:07,989 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:53:07,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019_tso.oepc.i [2024-06-04 14:53:08,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:53:09,197 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:53:09,201 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_tso.oepc.i [2024-06-04 14:53:09,249 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd245586e/ffb460ea4d23415882aee1344ac2d7a5/FLAG9b6c3b4be [2024-06-04 14:53:09,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd245586e/ffb460ea4d23415882aee1344ac2d7a5 [2024-06-04 14:53:09,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:53:09,265 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:53:09,266 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:53:09,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:53:09,270 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:53:09,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:53:07" (1/2) ... [2024-06-04 14:53:09,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d851341 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:09, skipping insertion in model container [2024-06-04 14:53:09,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:53:07" (1/2) ... [2024-06-04 14:53:09,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@501171c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:53:09, skipping insertion in model container [2024-06-04 14:53:09,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:53:09" (2/2) ... [2024-06-04 14:53:09,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d851341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09, skipping insertion in model container [2024-06-04 14:53:09,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:53:09" (2/2) ... [2024-06-04 14:53:09,273 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:53:09,352 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:53:09,352 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 14:53:09,353 INFO L97 edCorrectnessWitness]: Location invariant before [L831-L831] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$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))) [2024-06-04 14:53:09,353 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))) [2024-06-04 14:53:09,353 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:53:09,353 INFO L106 edCorrectnessWitness]: ghost_update [L826-L826] multithreaded = 1; [2024-06-04 14:53:09,387 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:53:09,665 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:53:09,683 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:53:09,806 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:53:09,834 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:53:09,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09 WrapperNode [2024-06-04 14:53:09,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:53:09,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:53:09,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:53:09,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:53:09,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,896 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 145 [2024-06-04 14:53:09,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:53:09,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:53:09,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:53:09,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:53:09,907 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,909 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,921 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]. [2024-06-04 14:53:09,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,938 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,948 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:53:09,958 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:53:09,958 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:53:09,958 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:53:09,959 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (1/1) ... [2024-06-04 14:53:09,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:53:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:53:09,994 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) [2024-06-04 14:53:10,013 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 [2024-06-04 14:53:10,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:53:10,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:53:10,024 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:53:10,024 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:53:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:53:10,025 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:53:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:53:10,025 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:53:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:53:10,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:53:10,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:53:10,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:53:10,027 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:53:10,138 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:53:10,140 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:53:10,484 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:53:10,485 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:53:10,812 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:53:10,812 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:53:10,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:53:10 BoogieIcfgContainer [2024-06-04 14:53:10,813 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:53:10,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:53:10,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:53:10,818 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:53:10,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:53:07" (1/4) ... [2024-06-04 14:53:10,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b83e43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:53:10, skipping insertion in model container [2024-06-04 14:53:10,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:53:09" (2/4) ... [2024-06-04 14:53:10,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b83e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:53:10, skipping insertion in model container [2024-06-04 14:53:10,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:53:09" (3/4) ... [2024-06-04 14:53:10,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b83e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:53:10, skipping insertion in model container [2024-06-04 14:53:10,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:53:10" (4/4) ... [2024-06-04 14:53:10,821 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_tso.oepc.i [2024-06-04 14:53:10,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:53:10,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:53:10,834 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:53:10,885 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:53:10,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:53:10,951 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 14:53:10,952 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:53:10,953 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. [2024-06-04 14:53:10,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 14:53:10,957 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 14:53:10,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:53:10,976 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;@6d62ce2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:53:10,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:53:10,983 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:53:10,984 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:53:10,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:53:10,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:10,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:53:10,985 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)] === [2024-06-04 14:53:10,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1277020543, now seen corresponding path program 1 times [2024-06-04 14:53:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:10,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140239974] [2024-06-04 14:53:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:10,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:12,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:12,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140239974] [2024-06-04 14:53:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140239974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:12,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:12,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:53:12,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097955214] [2024-06-04 14:53:12,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:12,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:53:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:53:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:53:12,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-04 14:53:12,150 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) [2024-06-04 14:53:12,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:12,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-04 14:53:12,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:12,424 INFO L124 PetriNetUnfolderBase]: 1156/1874 cut-off events. [2024-06-04 14:53:12,424 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-04 14:53:12,429 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. [2024-06-04 14:53:12,436 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 14:53:12,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-04 14:53:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:53:12,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:53:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-04 14:53:12,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 14:53:12,447 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-04 14:53:12,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-04 14:53:12,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:12,451 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 14:53:12,452 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} [2024-06-04 14:53:12,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 14:53:12,455 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 14:53:12,455 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) [2024-06-04 14:53:12,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:12,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:53:12,456 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)] === [2024-06-04 14:53:12,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:12,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1143930976, now seen corresponding path program 1 times [2024-06-04 14:53:12,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:12,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968052426] [2024-06-04 14:53:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:12,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:13,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:13,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968052426] [2024-06-04 14:53:13,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968052426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:13,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:13,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:53:13,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442009429] [2024-06-04 14:53:13,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:13,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:53:13,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:53:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:53:13,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:13,087 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) [2024-06-04 14:53:13,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:13,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:13,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:13,347 INFO L124 PetriNetUnfolderBase]: 1357/2119 cut-off events. [2024-06-04 14:53:13,347 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-04 14:53:13,349 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. [2024-06-04 14:53:13,355 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-04 14:53:13,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-04 14:53:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:53:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:53:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-04 14:53:13,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 14:53:13,357 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-04 14:53:13,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-04 14:53:13,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:53:13,359 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-04 14:53:13,359 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} [2024-06-04 14:53:13,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-04 14:53:13,360 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-04 14:53:13,360 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) [2024-06-04 14:53:13,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:13,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:13,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:53:13,361 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)] === [2024-06-04 14:53:13,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:13,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1102122766, now seen corresponding path program 1 times [2024-06-04 14:53:13,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:13,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946789925] [2024-06-04 14:53:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:13,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:13,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946789925] [2024-06-04 14:53:13,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946789925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:13,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:53:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790034305] [2024-06-04 14:53:13,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:13,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:53:13,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:53:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:53:13,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:13,981 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) [2024-06-04 14:53:13,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:13,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:13,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:14,289 INFO L124 PetriNetUnfolderBase]: 1345/2103 cut-off events. [2024-06-04 14:53:14,289 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2024-06-04 14:53:14,293 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. [2024-06-04 14:53:14,301 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 49 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-04 14:53:14,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 326 flow [2024-06-04 14:53:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:53:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:53:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-04 14:53:14,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 14:53:14,306 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 112 transitions. [2024-06-04 14:53:14,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 326 flow [2024-06-04 14:53:14,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:14,309 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-04 14:53:14,309 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} [2024-06-04 14:53:14,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-04 14:53:14,310 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-04 14:53:14,310 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) [2024-06-04 14:53:14,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:14,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:14,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:53:14,311 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)] === [2024-06-04 14:53:14,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1716914867, now seen corresponding path program 1 times [2024-06-04 14:53:14,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:14,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885949788] [2024-06-04 14:53:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:14,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:15,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:15,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885949788] [2024-06-04 14:53:15,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885949788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:15,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:15,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:15,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410556125] [2024-06-04 14:53:15,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:15,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:15,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:15,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:15,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:15,355 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) [2024-06-04 14:53:15,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:15,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:15,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:15,826 INFO L124 PetriNetUnfolderBase]: 1336/2086 cut-off events. [2024-06-04 14:53:15,827 INFO L125 PetriNetUnfolderBase]: For 2056/2056 co-relation queries the response was YES. [2024-06-04 14:53:15,829 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. [2024-06-04 14:53:15,835 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-04 14:53:15,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 380 flow [2024-06-04 14:53:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-04 14:53:15,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-04 14:53:15,837 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 128 transitions. [2024-06-04 14:53:15,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 380 flow [2024-06-04 14:53:15,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 356 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:15,839 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-04 14:53:15,839 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} [2024-06-04 14:53:15,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-04 14:53:15,840 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-04 14:53:15,840 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) [2024-06-04 14:53:15,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:15,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:15,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:53:15,841 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)] === [2024-06-04 14:53:15,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2100828532, now seen corresponding path program 1 times [2024-06-04 14:53:15,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:15,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234620527] [2024-06-04 14:53:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:15,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:16,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234620527] [2024-06-04 14:53:16,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234620527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:16,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:16,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:53:16,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061706872] [2024-06-04 14:53:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:16,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:53:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:53:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:53:16,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-04 14:53:16,562 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) [2024-06-04 14:53:16,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:16,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-04 14:53:16,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:16,821 INFO L124 PetriNetUnfolderBase]: 1124/1900 cut-off events. [2024-06-04 14:53:16,821 INFO L125 PetriNetUnfolderBase]: For 2652/2652 co-relation queries the response was YES. [2024-06-04 14:53:16,825 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. [2024-06-04 14:53:16,832 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-04 14:53:16,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 339 flow [2024-06-04 14:53:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:53:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:53:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-04 14:53:16,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:53:16,834 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 95 transitions. [2024-06-04 14:53:16,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 339 flow [2024-06-04 14:53:16,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 306 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:16,841 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-04 14:53:16,842 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} [2024-06-04 14:53:16,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 14:53:16,844 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-04 14:53:16,845 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) [2024-06-04 14:53:16,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:16,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:16,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:53:16,849 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)] === [2024-06-04 14:53:16,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 476472641, now seen corresponding path program 1 times [2024-06-04 14:53:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500783805] [2024-06-04 14:53:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:17,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:17,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500783805] [2024-06-04 14:53:17,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500783805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:17,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:17,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384879098] [2024-06-04 14:53:17,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:17,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:17,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:17,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:17,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:17,581 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) [2024-06-04 14:53:17,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:17,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:17,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:17,945 INFO L124 PetriNetUnfolderBase]: 1342/2120 cut-off events. [2024-06-04 14:53:17,945 INFO L125 PetriNetUnfolderBase]: For 4395/4395 co-relation queries the response was YES. [2024-06-04 14:53:17,948 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. [2024-06-04 14:53:17,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-04 14:53:17,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 396 flow [2024-06-04 14:53:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:17,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 14:53:17,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-04 14:53:17,957 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 110 transitions. [2024-06-04 14:53:17,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 396 flow [2024-06-04 14:53:17,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 374 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:17,962 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 240 flow [2024-06-04 14:53:17,962 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} [2024-06-04 14:53:17,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-04 14:53:17,962 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 240 flow [2024-06-04 14:53:17,963 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) [2024-06-04 14:53:17,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:17,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:17,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:53:17,963 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)] === [2024-06-04 14:53:17,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:17,964 INFO L85 PathProgramCache]: Analyzing trace with hash -996192821, now seen corresponding path program 2 times [2024-06-04 14:53:17,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:17,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443216728] [2024-06-04 14:53:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:18,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:18,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443216728] [2024-06-04 14:53:18,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443216728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:18,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:18,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:18,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526957963] [2024-06-04 14:53:18,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:18,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:18,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:18,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:18,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:18,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:18,670 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) [2024-06-04 14:53:18,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:18,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:18,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:18,999 INFO L124 PetriNetUnfolderBase]: 1337/2124 cut-off events. [2024-06-04 14:53:18,999 INFO L125 PetriNetUnfolderBase]: For 5954/5966 co-relation queries the response was YES. [2024-06-04 14:53:19,002 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. [2024-06-04 14:53:19,011 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 46 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2024-06-04 14:53:19,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 428 flow [2024-06-04 14:53:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-04 14:53:19,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-04 14:53:19,012 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 240 flow. Second operand 6 states and 109 transitions. [2024-06-04 14:53:19,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 428 flow [2024-06-04 14:53:19,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 396 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:19,016 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 280 flow [2024-06-04 14:53:19,016 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} [2024-06-04 14:53:19,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-04 14:53:19,017 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 280 flow [2024-06-04 14:53:19,017 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) [2024-06-04 14:53:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:19,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:53:19,017 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)] === [2024-06-04 14:53:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 458813367, now seen corresponding path program 1 times [2024-06-04 14:53:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562096134] [2024-06-04 14:53:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:19,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:19,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562096134] [2024-06-04 14:53:19,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562096134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:19,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:19,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:19,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214076507] [2024-06-04 14:53:19,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:19,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:19,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:19,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:20,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:20,045 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) [2024-06-04 14:53:20,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:20,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:20,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:20,419 INFO L124 PetriNetUnfolderBase]: 1377/2267 cut-off events. [2024-06-04 14:53:20,420 INFO L125 PetriNetUnfolderBase]: For 7558/7558 co-relation queries the response was YES. [2024-06-04 14:53:20,423 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. [2024-06-04 14:53:20,435 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2024-06-04 14:53:20,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 511 flow [2024-06-04 14:53:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-04 14:53:20,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-04 14:53:20,438 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 280 flow. Second operand 7 states and 123 transitions. [2024-06-04 14:53:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 511 flow [2024-06-04 14:53:20,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 460 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:20,442 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 316 flow [2024-06-04 14:53:20,442 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} [2024-06-04 14:53:20,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-04 14:53:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 316 flow [2024-06-04 14:53:20,444 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) [2024-06-04 14:53:20,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:20,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:20,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:53:20,444 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)] === [2024-06-04 14:53:20,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:20,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1542312761, now seen corresponding path program 1 times [2024-06-04 14:53:20,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:20,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143247757] [2024-06-04 14:53:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:21,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143247757] [2024-06-04 14:53:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143247757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:21,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212454670] [2024-06-04 14:53:21,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:21,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:21,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:21,188 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) [2024-06-04 14:53:21,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:21,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:21,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:21,657 INFO L124 PetriNetUnfolderBase]: 1589/2489 cut-off events. [2024-06-04 14:53:21,657 INFO L125 PetriNetUnfolderBase]: For 11563/11563 co-relation queries the response was YES. [2024-06-04 14:53:21,662 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. [2024-06-04 14:53:21,714 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 67 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-04 14:53:21,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 590 flow [2024-06-04 14:53:21,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 14:53:21,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-04 14:53:21,716 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 316 flow. Second operand 7 states and 131 transitions. [2024-06-04 14:53:21,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 590 flow [2024-06-04 14:53:21,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 550 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:21,720 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 370 flow [2024-06-04 14:53:21,720 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} [2024-06-04 14:53:21,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-04 14:53:21,721 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 370 flow [2024-06-04 14:53:21,721 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) [2024-06-04 14:53:21,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:21,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:21,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:53:21,722 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)] === [2024-06-04 14:53:21,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash 305035251, now seen corresponding path program 2 times [2024-06-04 14:53:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:21,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736472761] [2024-06-04 14:53:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:21,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:22,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736472761] [2024-06-04 14:53:22,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736472761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:22,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:22,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:22,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547691893] [2024-06-04 14:53:22,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:22,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:22,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:22,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:22,633 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) [2024-06-04 14:53:22,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:22,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:22,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:23,103 INFO L124 PetriNetUnfolderBase]: 1669/2589 cut-off events. [2024-06-04 14:53:23,103 INFO L125 PetriNetUnfolderBase]: For 15268/15268 co-relation queries the response was YES. [2024-06-04 14:53:23,108 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. [2024-06-04 14:53:23,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-04 14:53:23,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 748 flow [2024-06-04 14:53:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 14:53:23,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-04 14:53:23,119 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 370 flow. Second operand 7 states and 135 transitions. [2024-06-04 14:53:23,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 748 flow [2024-06-04 14:53:23,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 706 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:23,127 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 486 flow [2024-06-04 14:53:23,127 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} [2024-06-04 14:53:23,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 14:53:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 486 flow [2024-06-04 14:53:23,128 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) [2024-06-04 14:53:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:23,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:23,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:53:23,129 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)] === [2024-06-04 14:53:23,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash 482166771, now seen corresponding path program 3 times [2024-06-04 14:53:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993324021] [2024-06-04 14:53:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:23,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:23,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993324021] [2024-06-04 14:53:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993324021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:23,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:23,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:23,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313063285] [2024-06-04 14:53:23,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:23,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:23,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:24,020 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) [2024-06-04 14:53:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:24,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:24,410 INFO L124 PetriNetUnfolderBase]: 1687/2625 cut-off events. [2024-06-04 14:53:24,410 INFO L125 PetriNetUnfolderBase]: For 20168/20203 co-relation queries the response was YES. [2024-06-04 14:53:24,415 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. [2024-06-04 14:53:24,425 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2024-06-04 14:53:24,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 942 flow [2024-06-04 14:53:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-04 14:53:24,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-04 14:53:24,427 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 486 flow. Second operand 7 states and 139 transitions. [2024-06-04 14:53:24,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 942 flow [2024-06-04 14:53:24,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 896 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:24,436 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 638 flow [2024-06-04 14:53:24,437 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} [2024-06-04 14:53:24,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-04 14:53:24,437 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 638 flow [2024-06-04 14:53:24,437 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) [2024-06-04 14:53:24,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:24,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:53:24,438 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)] === [2024-06-04 14:53:24,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:24,438 INFO L85 PathProgramCache]: Analyzing trace with hash 482413035, now seen corresponding path program 1 times [2024-06-04 14:53:24,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:24,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622117875] [2024-06-04 14:53:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:25,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:25,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622117875] [2024-06-04 14:53:25,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622117875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:25,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:25,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:25,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956213581] [2024-06-04 14:53:25,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:25,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:25,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:25,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:25,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:25,564 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) [2024-06-04 14:53:25,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:25,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:25,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:25,983 INFO L124 PetriNetUnfolderBase]: 1573/2546 cut-off events. [2024-06-04 14:53:25,984 INFO L125 PetriNetUnfolderBase]: For 20164/20164 co-relation queries the response was YES. [2024-06-04 14:53:25,990 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. [2024-06-04 14:53:26,000 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 85 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-04 14:53:26,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 106 transitions, 932 flow [2024-06-04 14:53:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-04 14:53:26,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-04 14:53:26,002 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 638 flow. Second operand 8 states and 139 transitions. [2024-06-04 14:53:26,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 106 transitions, 932 flow [2024-06-04 14:53:26,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 828 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:26,016 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 609 flow [2024-06-04 14:53:26,016 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} [2024-06-04 14:53:26,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-04 14:53:26,016 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 609 flow [2024-06-04 14:53:26,017 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) [2024-06-04 14:53:26,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:26,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:26,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:53:26,017 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)] === [2024-06-04 14:53:26,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -762430686, now seen corresponding path program 1 times [2024-06-04 14:53:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557657477] [2024-06-04 14:53:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:26,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:26,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557657477] [2024-06-04 14:53:26,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557657477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:26,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:26,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:53:26,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251777726] [2024-06-04 14:53:26,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:26,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:53:26,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:26,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:53:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:53:26,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:26,614 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) [2024-06-04 14:53:26,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:26,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:26,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:27,003 INFO L124 PetriNetUnfolderBase]: 1822/2809 cut-off events. [2024-06-04 14:53:27,004 INFO L125 PetriNetUnfolderBase]: For 23970/23970 co-relation queries the response was YES. [2024-06-04 14:53:27,009 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. [2024-06-04 14:53:27,018 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 81 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2024-06-04 14:53:27,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 93 transitions, 829 flow [2024-06-04 14:53:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:53:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:53:27,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-04 14:53:27,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-04 14:53:27,019 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 609 flow. Second operand 5 states and 83 transitions. [2024-06-04 14:53:27,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 93 transitions, 829 flow [2024-06-04 14:53:27,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 774 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:27,033 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 604 flow [2024-06-04 14:53:27,033 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} [2024-06-04 14:53:27,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-04 14:53:27,033 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 604 flow [2024-06-04 14:53:27,034 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) [2024-06-04 14:53:27,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:27,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:27,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:53:27,034 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)] === [2024-06-04 14:53:27,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 862350538, now seen corresponding path program 1 times [2024-06-04 14:53:27,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:27,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280079010] [2024-06-04 14:53:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:27,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:28,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:28,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280079010] [2024-06-04 14:53:28,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280079010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:28,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:28,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501660106] [2024-06-04 14:53:28,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:28,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:28,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:28,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:28,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:28,130 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) [2024-06-04 14:53:28,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:28,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:28,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:28,730 INFO L124 PetriNetUnfolderBase]: 1761/2722 cut-off events. [2024-06-04 14:53:28,730 INFO L125 PetriNetUnfolderBase]: For 31240/31266 co-relation queries the response was YES. [2024-06-04 14:53:28,737 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. [2024-06-04 14:53:28,747 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-06-04 14:53:28,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 932 flow [2024-06-04 14:53:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-04 14:53:28,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-04 14:53:28,749 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 604 flow. Second operand 7 states and 131 transitions. [2024-06-04 14:53:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 932 flow [2024-06-04 14:53:28,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 904 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 14:53:28,761 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 678 flow [2024-06-04 14:53:28,761 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} [2024-06-04 14:53:28,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-04 14:53:28,762 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 678 flow [2024-06-04 14:53:28,763 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) [2024-06-04 14:53:28,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:28,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:28,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:53:28,763 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)] === [2024-06-04 14:53:28,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 866165770, now seen corresponding path program 1 times [2024-06-04 14:53:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863074799] [2024-06-04 14:53:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:29,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:29,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863074799] [2024-06-04 14:53:29,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863074799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:29,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:29,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:29,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942354768] [2024-06-04 14:53:29,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:29,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:29,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:29,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:29,833 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) [2024-06-04 14:53:29,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:29,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:29,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:30,351 INFO L124 PetriNetUnfolderBase]: 1895/2887 cut-off events. [2024-06-04 14:53:30,351 INFO L125 PetriNetUnfolderBase]: For 34471/34471 co-relation queries the response was YES. [2024-06-04 14:53:30,359 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. [2024-06-04 14:53:30,368 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 17 changer transitions 0/119 dead transitions. [2024-06-04 14:53:30,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 119 transitions, 1023 flow [2024-06-04 14:53:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:53:30,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 14:53:30,370 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 678 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:53:30,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 119 transitions, 1023 flow [2024-06-04 14:53:30,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 965 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:30,387 INFO L231 Difference]: Finished difference. Result has 86 places, 93 transitions, 723 flow [2024-06-04 14:53:30,388 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} [2024-06-04 14:53:30,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-04 14:53:30,388 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 93 transitions, 723 flow [2024-06-04 14:53:30,388 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) [2024-06-04 14:53:30,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:30,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:30,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:53:30,389 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)] === [2024-06-04 14:53:30,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash 436463146, now seen corresponding path program 2 times [2024-06-04 14:53:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:30,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623903242] [2024-06-04 14:53:30,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:31,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:31,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623903242] [2024-06-04 14:53:31,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623903242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:31,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:31,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559632993] [2024-06-04 14:53:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:31,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:31,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:31,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:31,521 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) [2024-06-04 14:53:31,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:31,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:31,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:32,006 INFO L124 PetriNetUnfolderBase]: 1917/2921 cut-off events. [2024-06-04 14:53:32,006 INFO L125 PetriNetUnfolderBase]: For 38609/38624 co-relation queries the response was YES. [2024-06-04 14:53:32,013 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. [2024-06-04 14:53:32,021 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 27 changer transitions 0/123 dead transitions. [2024-06-04 14:53:32,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 1084 flow [2024-06-04 14:53:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-04 14:53:32,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:53:32,023 INFO L175 Difference]: Start difference. First operand has 86 places, 93 transitions, 723 flow. Second operand 8 states and 136 transitions. [2024-06-04 14:53:32,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 1084 flow [2024-06-04 14:53:32,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 1026 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:32,041 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 808 flow [2024-06-04 14:53:32,041 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} [2024-06-04 14:53:32,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-04 14:53:32,042 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 808 flow [2024-06-04 14:53:32,042 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) [2024-06-04 14:53:32,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:32,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:32,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:53:32,043 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)] === [2024-06-04 14:53:32,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2069627244, now seen corresponding path program 3 times [2024-06-04 14:53:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:32,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695342208] [2024-06-04 14:53:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:32,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:32,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695342208] [2024-06-04 14:53:32,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695342208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:32,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:32,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:32,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111963659] [2024-06-04 14:53:32,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:32,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:33,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:33,051 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) [2024-06-04 14:53:33,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:33,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:33,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:33,595 INFO L124 PetriNetUnfolderBase]: 1972/3005 cut-off events. [2024-06-04 14:53:33,595 INFO L125 PetriNetUnfolderBase]: For 44026/44032 co-relation queries the response was YES. [2024-06-04 14:53:33,602 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. [2024-06-04 14:53:33,610 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 92 selfloop transitions, 56 changer transitions 0/153 dead transitions. [2024-06-04 14:53:33,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 1387 flow [2024-06-04 14:53:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:53:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:53:33,613 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 808 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:53:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 1387 flow [2024-06-04 14:53:33,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1303 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:33,636 INFO L231 Difference]: Finished difference. Result has 96 places, 123 transitions, 1069 flow [2024-06-04 14:53:33,636 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} [2024-06-04 14:53:33,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-04 14:53:33,636 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 123 transitions, 1069 flow [2024-06-04 14:53:33,636 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) [2024-06-04 14:53:33,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:33,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:33,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:53:33,637 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)] === [2024-06-04 14:53:33,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2069894154, now seen corresponding path program 4 times [2024-06-04 14:53:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:33,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942681424] [2024-06-04 14:53:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:33,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:34,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:34,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942681424] [2024-06-04 14:53:34,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942681424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:34,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:34,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:34,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264240329] [2024-06-04 14:53:34,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:34,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:34,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:34,674 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) [2024-06-04 14:53:34,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:34,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:34,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:35,194 INFO L124 PetriNetUnfolderBase]: 1961/2984 cut-off events. [2024-06-04 14:53:35,195 INFO L125 PetriNetUnfolderBase]: For 47975/47990 co-relation queries the response was YES. [2024-06-04 14:53:35,202 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. [2024-06-04 14:53:35,212 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 108 selfloop transitions, 42 changer transitions 0/155 dead transitions. [2024-06-04 14:53:35,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1527 flow [2024-06-04 14:53:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:53:35,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:53:35,214 INFO L175 Difference]: Start difference. First operand has 96 places, 123 transitions, 1069 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:53:35,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1527 flow [2024-06-04 14:53:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 155 transitions, 1461 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-04 14:53:35,249 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1194 flow [2024-06-04 14:53:35,249 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} [2024-06-04 14:53:35,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-04 14:53:35,250 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1194 flow [2024-06-04 14:53:35,250 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) [2024-06-04 14:53:35,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:35,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:35,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:53:35,251 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)] === [2024-06-04 14:53:35,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2134453610, now seen corresponding path program 1 times [2024-06-04 14:53:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:35,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325663656] [2024-06-04 14:53:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:35,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:35,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325663656] [2024-06-04 14:53:35,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325663656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:35,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:35,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870678459] [2024-06-04 14:53:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:35,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:35,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:35,939 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) [2024-06-04 14:53:35,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:35,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:35,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:36,464 INFO L124 PetriNetUnfolderBase]: 1861/2862 cut-off events. [2024-06-04 14:53:36,465 INFO L125 PetriNetUnfolderBase]: For 43188/43188 co-relation queries the response was YES. [2024-06-04 14:53:36,472 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. [2024-06-04 14:53:36,480 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 126 selfloop transitions, 11 changer transitions 0/141 dead transitions. [2024-06-04 14:53:36,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 141 transitions, 1521 flow [2024-06-04 14:53:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 14:53:36,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:53:36,482 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1194 flow. Second operand 6 states and 96 transitions. [2024-06-04 14:53:36,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 141 transitions, 1521 flow [2024-06-04 14:53:36,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1427 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:36,513 INFO L231 Difference]: Finished difference. Result has 105 places, 131 transitions, 1160 flow [2024-06-04 14:53:36,513 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} [2024-06-04 14:53:36,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 14:53:36,514 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 131 transitions, 1160 flow [2024-06-04 14:53:36,514 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) [2024-06-04 14:53:36,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:36,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:36,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:53:36,514 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)] === [2024-06-04 14:53:36,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash -199728068, now seen corresponding path program 1 times [2024-06-04 14:53:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:36,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562590316] [2024-06-04 14:53:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562590316] [2024-06-04 14:53:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562590316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:37,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:37,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109272332] [2024-06-04 14:53:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:37,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:37,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:37,669 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) [2024-06-04 14:53:37,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:37,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:37,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:38,261 INFO L124 PetriNetUnfolderBase]: 1860/2888 cut-off events. [2024-06-04 14:53:38,262 INFO L125 PetriNetUnfolderBase]: For 55390/55400 co-relation queries the response was YES. [2024-06-04 14:53:38,271 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. [2024-06-04 14:53:38,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 18 changer transitions 0/163 dead transitions. [2024-06-04 14:53:38,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 163 transitions, 1588 flow [2024-06-04 14:53:38,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:53:38,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-04 14:53:38,283 INFO L175 Difference]: Start difference. First operand has 105 places, 131 transitions, 1160 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:53:38,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 163 transitions, 1588 flow [2024-06-04 14:53:38,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 163 transitions, 1550 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:53:38,379 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1209 flow [2024-06-04 14:53:38,379 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} [2024-06-04 14:53:38,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-04 14:53:38,380 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1209 flow [2024-06-04 14:53:38,380 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) [2024-06-04 14:53:38,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:38,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:53:38,381 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)] === [2024-06-04 14:53:38,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash -273461382, now seen corresponding path program 2 times [2024-06-04 14:53:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026961786] [2024-06-04 14:53:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:39,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:39,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026961786] [2024-06-04 14:53:39,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026961786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:39,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:39,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:39,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033618942] [2024-06-04 14:53:39,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:39,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:39,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:39,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:39,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:39,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:39,464 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) [2024-06-04 14:53:39,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:39,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:40,027 INFO L124 PetriNetUnfolderBase]: 1891/2937 cut-off events. [2024-06-04 14:53:40,028 INFO L125 PetriNetUnfolderBase]: For 62863/62868 co-relation queries the response was YES. [2024-06-04 14:53:40,037 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. [2024-06-04 14:53:40,047 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 129 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-06-04 14:53:40,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 165 transitions, 1647 flow [2024-06-04 14:53:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:40,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:53:40,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 14:53:40,049 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1209 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:53:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 165 transitions, 1647 flow [2024-06-04 14:53:40,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 1578 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:40,078 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1250 flow [2024-06-04 14:53:40,079 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} [2024-06-04 14:53:40,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-04 14:53:40,079 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1250 flow [2024-06-04 14:53:40,079 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) [2024-06-04 14:53:40,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:40,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:40,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:53:40,080 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)] === [2024-06-04 14:53:40,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash -287966562, now seen corresponding path program 1 times [2024-06-04 14:53:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:40,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395092202] [2024-06-04 14:53:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:40,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395092202] [2024-06-04 14:53:40,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395092202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:40,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:40,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234014507] [2024-06-04 14:53:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:40,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:41,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:41,021 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) [2024-06-04 14:53:41,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:41,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:41,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:41,545 INFO L124 PetriNetUnfolderBase]: 2020/3074 cut-off events. [2024-06-04 14:53:41,546 INFO L125 PetriNetUnfolderBase]: For 67653/67653 co-relation queries the response was YES. [2024-06-04 14:53:41,554 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. [2024-06-04 14:53:41,564 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 39 changer transitions 0/164 dead transitions. [2024-06-04 14:53:41,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 164 transitions, 1658 flow [2024-06-04 14:53:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-04 14:53:41,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-04 14:53:41,565 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1250 flow. Second operand 8 states and 143 transitions. [2024-06-04 14:53:41,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 164 transitions, 1658 flow [2024-06-04 14:53:41,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 164 transitions, 1554 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:41,606 INFO L231 Difference]: Finished difference. Result has 114 places, 136 transitions, 1263 flow [2024-06-04 14:53:41,606 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} [2024-06-04 14:53:41,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-04 14:53:41,607 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 136 transitions, 1263 flow [2024-06-04 14:53:41,607 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) [2024-06-04 14:53:41,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:41,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:41,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:53:41,608 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)] === [2024-06-04 14:53:41,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1081152242, now seen corresponding path program 3 times [2024-06-04 14:53:41,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:41,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094348054] [2024-06-04 14:53:41,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:41,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:42,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094348054] [2024-06-04 14:53:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094348054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834278741] [2024-06-04 14:53:42,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:42,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:42,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:42,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:42,884 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) [2024-06-04 14:53:42,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:42,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:42,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:43,497 INFO L124 PetriNetUnfolderBase]: 1915/2979 cut-off events. [2024-06-04 14:53:43,497 INFO L125 PetriNetUnfolderBase]: For 75066/75071 co-relation queries the response was YES. [2024-06-04 14:53:43,505 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. [2024-06-04 14:53:43,513 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 35 changer transitions 0/166 dead transitions. [2024-06-04 14:53:43,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 166 transitions, 1698 flow [2024-06-04 14:53:43,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-04 14:53:43,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-04 14:53:43,515 INFO L175 Difference]: Start difference. First operand has 114 places, 136 transitions, 1263 flow. Second operand 8 states and 147 transitions. [2024-06-04 14:53:43,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 166 transitions, 1698 flow [2024-06-04 14:53:43,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1613 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:43,554 INFO L231 Difference]: Finished difference. Result has 117 places, 138 transitions, 1308 flow [2024-06-04 14:53:43,554 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} [2024-06-04 14:53:43,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-04 14:53:43,555 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 138 transitions, 1308 flow [2024-06-04 14:53:43,555 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) [2024-06-04 14:53:43,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:43,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:53:43,556 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)] === [2024-06-04 14:53:43,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:43,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1081336940, now seen corresponding path program 1 times [2024-06-04 14:53:43,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673152553] [2024-06-04 14:53:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:43,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:44,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:44,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673152553] [2024-06-04 14:53:44,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673152553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:44,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:44,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10929138] [2024-06-04 14:53:44,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:44,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:44,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:44,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:44,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:44,590 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) [2024-06-04 14:53:44,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:44,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:44,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:45,252 INFO L124 PetriNetUnfolderBase]: 2164/3298 cut-off events. [2024-06-04 14:53:45,252 INFO L125 PetriNetUnfolderBase]: For 82884/82884 co-relation queries the response was YES. [2024-06-04 14:53:45,262 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. [2024-06-04 14:53:45,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 131 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2024-06-04 14:53:45,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1805 flow [2024-06-04 14:53:45,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:53:45,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:53:45,275 INFO L175 Difference]: Start difference. First operand has 117 places, 138 transitions, 1308 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:53:45,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1805 flow [2024-06-04 14:53:45,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 177 transitions, 1702 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:45,325 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1342 flow [2024-06-04 14:53:45,325 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} [2024-06-04 14:53:45,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-04 14:53:45,326 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1342 flow [2024-06-04 14:53:45,326 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) [2024-06-04 14:53:45,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:45,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:45,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:53:45,326 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)] === [2024-06-04 14:53:45,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:45,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1732111873, now seen corresponding path program 1 times [2024-06-04 14:53:45,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:45,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698236333] [2024-06-04 14:53:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:45,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698236333] [2024-06-04 14:53:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698236333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:45,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:45,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638174749] [2024-06-04 14:53:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:45,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:46,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:53:46,005 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) [2024-06-04 14:53:46,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:46,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:53:46,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:46,593 INFO L124 PetriNetUnfolderBase]: 2299/3435 cut-off events. [2024-06-04 14:53:46,594 INFO L125 PetriNetUnfolderBase]: For 81903/81903 co-relation queries the response was YES. [2024-06-04 14:53:46,604 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. [2024-06-04 14:53:46,616 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 143 selfloop transitions, 16 changer transitions 0/162 dead transitions. [2024-06-04 14:53:46,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 162 transitions, 1816 flow [2024-06-04 14:53:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-04 14:53:46,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:53:46,617 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1342 flow. Second operand 6 states and 99 transitions. [2024-06-04 14:53:46,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 162 transitions, 1816 flow [2024-06-04 14:53:46,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 162 transitions, 1709 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:46,669 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1343 flow [2024-06-04 14:53:46,669 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} [2024-06-04 14:53:46,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 14:53:46,669 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1343 flow [2024-06-04 14:53:46,670 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) [2024-06-04 14:53:46,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:46,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:46,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:53:46,670 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)] === [2024-06-04 14:53:46,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:46,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1253232184, now seen corresponding path program 2 times [2024-06-04 14:53:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:46,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669315752] [2024-06-04 14:53:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:47,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669315752] [2024-06-04 14:53:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669315752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:47,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:47,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278133266] [2024-06-04 14:53:47,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:47,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:47,783 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) [2024-06-04 14:53:47,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:47,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:47,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:48,447 INFO L124 PetriNetUnfolderBase]: 2264/3464 cut-off events. [2024-06-04 14:53:48,448 INFO L125 PetriNetUnfolderBase]: For 96137/96155 co-relation queries the response was YES. [2024-06-04 14:53:48,459 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. [2024-06-04 14:53:48,471 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 60 changer transitions 0/183 dead transitions. [2024-06-04 14:53:48,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 183 transitions, 1847 flow [2024-06-04 14:53:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:53:48,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-04 14:53:48,473 INFO L175 Difference]: Start difference. First operand has 120 places, 146 transitions, 1343 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:53:48,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 183 transitions, 1847 flow [2024-06-04 14:53:48,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 183 transitions, 1809 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:53:48,526 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1486 flow [2024-06-04 14:53:48,526 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} [2024-06-04 14:53:48,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 14:53:48,526 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1486 flow [2024-06-04 14:53:48,527 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) [2024-06-04 14:53:48,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:48,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:48,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:53:48,527 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)] === [2024-06-04 14:53:48,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash -257492150, now seen corresponding path program 3 times [2024-06-04 14:53:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:48,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857167427] [2024-06-04 14:53:48,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:48,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:49,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:49,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857167427] [2024-06-04 14:53:49,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857167427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:49,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:49,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:49,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096221983] [2024-06-04 14:53:49,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:49,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:49,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:49,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:49,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:49,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:49,738 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) [2024-06-04 14:53:49,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:49,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:49,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:50,462 INFO L124 PetriNetUnfolderBase]: 2392/3672 cut-off events. [2024-06-04 14:53:50,462 INFO L125 PetriNetUnfolderBase]: For 107719/107737 co-relation queries the response was YES. [2024-06-04 14:53:50,474 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. [2024-06-04 14:53:50,487 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 84 changer transitions 0/191 dead transitions. [2024-06-04 14:53:50,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 191 transitions, 2256 flow [2024-06-04 14:53:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:53:50,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:53:50,489 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1486 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:53:50,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 191 transitions, 2256 flow [2024-06-04 14:53:50,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 191 transitions, 2105 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:50,548 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 1618 flow [2024-06-04 14:53:50,548 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} [2024-06-04 14:53:50,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-04 14:53:50,548 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 1618 flow [2024-06-04 14:53:50,549 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) [2024-06-04 14:53:50,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:50,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:50,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:53:50,549 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)] === [2024-06-04 14:53:50,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash -257788820, now seen corresponding path program 4 times [2024-06-04 14:53:50,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:50,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796388044] [2024-06-04 14:53:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:50,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:51,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:51,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796388044] [2024-06-04 14:53:51,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796388044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:51,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:51,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:51,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706706628] [2024-06-04 14:53:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:51,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:51,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:51,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:51,624 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) [2024-06-04 14:53:51,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:51,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:51,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:52,254 INFO L124 PetriNetUnfolderBase]: 2409/3699 cut-off events. [2024-06-04 14:53:52,254 INFO L125 PetriNetUnfolderBase]: For 115000/115018 co-relation queries the response was YES. [2024-06-04 14:53:52,269 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. [2024-06-04 14:53:52,284 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 102 selfloop transitions, 77 changer transitions 0/186 dead transitions. [2024-06-04 14:53:52,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 186 transitions, 2214 flow [2024-06-04 14:53:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:53:52,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-04 14:53:52,285 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 1618 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:53:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 186 transitions, 2214 flow [2024-06-04 14:53:52,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 186 transitions, 2041 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:52,377 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1666 flow [2024-06-04 14:53:52,378 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} [2024-06-04 14:53:52,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 14:53:52,378 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1666 flow [2024-06-04 14:53:52,378 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) [2024-06-04 14:53:52,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:52,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:52,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:53:52,379 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)] === [2024-06-04 14:53:52,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash -493970938, now seen corresponding path program 2 times [2024-06-04 14:53:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928309212] [2024-06-04 14:53:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:52,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:53,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:53,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928309212] [2024-06-04 14:53:53,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928309212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:53,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:53,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:53:53,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341776079] [2024-06-04 14:53:53,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:53,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:53:53,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:53:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:53:53,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:53,376 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) [2024-06-04 14:53:53,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:53,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:53,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:53,959 INFO L124 PetriNetUnfolderBase]: 2399/3685 cut-off events. [2024-06-04 14:53:53,960 INFO L125 PetriNetUnfolderBase]: For 118355/118373 co-relation queries the response was YES. [2024-06-04 14:53:53,972 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. [2024-06-04 14:53:53,984 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 56 changer transitions 0/180 dead transitions. [2024-06-04 14:53:53,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 180 transitions, 2084 flow [2024-06-04 14:53:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:53:53,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-04 14:53:53,986 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1666 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:53:53,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 180 transitions, 2084 flow [2024-06-04 14:53:54,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 180 transitions, 1863 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 14:53:54,078 INFO L231 Difference]: Finished difference. Result has 134 places, 154 transitions, 1569 flow [2024-06-04 14:53:54,078 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} [2024-06-04 14:53:54,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 14:53:54,079 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 154 transitions, 1569 flow [2024-06-04 14:53:54,079 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) [2024-06-04 14:53:54,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:54,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:54,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:53:54,080 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)] === [2024-06-04 14:53:54,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -493964180, now seen corresponding path program 5 times [2024-06-04 14:53:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:54,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707060969] [2024-06-04 14:53:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:55,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:55,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707060969] [2024-06-04 14:53:55,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707060969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:55,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:55,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:55,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424725513] [2024-06-04 14:53:55,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:55,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:55,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:55,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:55,088 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) [2024-06-04 14:53:55,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:55,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:55,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:55,616 INFO L124 PetriNetUnfolderBase]: 2391/3671 cut-off events. [2024-06-04 14:53:55,616 INFO L125 PetriNetUnfolderBase]: For 122791/122809 co-relation queries the response was YES. [2024-06-04 14:53:55,629 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. [2024-06-04 14:53:55,641 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2024-06-04 14:53:55,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 183 transitions, 2032 flow [2024-06-04 14:53:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:53:55,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:53:55,644 INFO L175 Difference]: Start difference. First operand has 134 places, 154 transitions, 1569 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:53:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 183 transitions, 2032 flow [2024-06-04 14:53:55,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 183 transitions, 1833 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 14:53:55,714 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1479 flow [2024-06-04 14:53:55,714 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} [2024-06-04 14:53:55,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 14:53:55,715 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1479 flow [2024-06-04 14:53:55,715 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) [2024-06-04 14:53:55,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:55,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:53:55,716 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)] === [2024-06-04 14:53:55,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1688246886, now seen corresponding path program 4 times [2024-06-04 14:53:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:55,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179326881] [2024-06-04 14:53:55,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:56,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:56,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179326881] [2024-06-04 14:53:56,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179326881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:56,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:56,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:56,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239412431] [2024-06-04 14:53:56,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:56,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:56,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:56,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:56,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:56,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-04 14:53:56,939 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) [2024-06-04 14:53:56,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:56,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-04 14:53:56,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:57,548 INFO L124 PetriNetUnfolderBase]: 2232/3491 cut-off events. [2024-06-04 14:53:57,548 INFO L125 PetriNetUnfolderBase]: For 123138/123171 co-relation queries the response was YES. [2024-06-04 14:53:57,562 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. [2024-06-04 14:53:57,574 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 116 selfloop transitions, 53 changer transitions 0/182 dead transitions. [2024-06-04 14:53:57,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 182 transitions, 1941 flow [2024-06-04 14:53:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:53:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:53:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:53:57,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-04 14:53:57,576 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1479 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:53:57,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 182 transitions, 1941 flow [2024-06-04 14:53:57,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 1836 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:57,655 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1551 flow [2024-06-04 14:53:57,655 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} [2024-06-04 14:53:57,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-04 14:53:57,655 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1551 flow [2024-06-04 14:53:57,656 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) [2024-06-04 14:53:57,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:57,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:57,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:53:57,656 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)] === [2024-06-04 14:53:57,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1743539713, now seen corresponding path program 2 times [2024-06-04 14:53:57,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:57,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325856892] [2024-06-04 14:53:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:58,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:58,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325856892] [2024-06-04 14:53:58,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325856892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:58,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:58,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:58,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117540447] [2024-06-04 14:53:58,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:58,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:58,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:58,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:58,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:53:58,397 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) [2024-06-04 14:53:58,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:58,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:53:58,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:59,014 INFO L124 PetriNetUnfolderBase]: 2499/3770 cut-off events. [2024-06-04 14:53:59,014 INFO L125 PetriNetUnfolderBase]: For 126392/126410 co-relation queries the response was YES. [2024-06-04 14:53:59,027 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. [2024-06-04 14:53:59,039 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 147 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-04 14:53:59,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 166 transitions, 1902 flow [2024-06-04 14:53:59,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:53:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:53:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-04 14:53:59,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-04 14:53:59,041 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1551 flow. Second operand 6 states and 92 transitions. [2024-06-04 14:53:59,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 166 transitions, 1902 flow [2024-06-04 14:53:59,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1740 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:59,106 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1427 flow [2024-06-04 14:53:59,106 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} [2024-06-04 14:53:59,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-04 14:53:59,106 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1427 flow [2024-06-04 14:53:59,106 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) [2024-06-04 14:53:59,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:59,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:59,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:53:59,107 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)] === [2024-06-04 14:53:59,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:59,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1072226979, now seen corresponding path program 1 times [2024-06-04 14:53:59,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:59,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810149682] [2024-06-04 14:53:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:59,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810149682] [2024-06-04 14:53:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810149682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:59,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:53:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668685202] [2024-06-04 14:53:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:53:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:53:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:53:59,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:53:59,868 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) [2024-06-04 14:53:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:59,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:53:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:00,320 INFO L124 PetriNetUnfolderBase]: 2255/3497 cut-off events. [2024-06-04 14:54:00,320 INFO L125 PetriNetUnfolderBase]: For 111997/111997 co-relation queries the response was YES. [2024-06-04 14:54:00,333 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. [2024-06-04 14:54:00,344 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 156 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-04 14:54:00,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 176 transitions, 1918 flow [2024-06-04 14:54:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-04 14:54:00,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-04 14:54:00,346 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1427 flow. Second operand 6 states and 101 transitions. [2024-06-04 14:54:00,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 176 transitions, 1918 flow [2024-06-04 14:54:00,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 176 transitions, 1878 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:00,418 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1483 flow [2024-06-04 14:54:00,418 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} [2024-06-04 14:54:00,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-04 14:54:00,419 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1483 flow [2024-06-04 14:54:00,419 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) [2024-06-04 14:54:00,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:00,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:00,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:54:00,419 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)] === [2024-06-04 14:54:00,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:00,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1606749021, now seen corresponding path program 2 times [2024-06-04 14:54:00,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:00,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016480577] [2024-06-04 14:54:00,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:00,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:01,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016480577] [2024-06-04 14:54:01,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016480577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:01,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:01,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:01,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605067876] [2024-06-04 14:54:01,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:01,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:01,152 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) [2024-06-04 14:54:01,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:01,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:01,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:01,676 INFO L124 PetriNetUnfolderBase]: 2252/3493 cut-off events. [2024-06-04 14:54:01,676 INFO L125 PetriNetUnfolderBase]: For 118210/118210 co-relation queries the response was YES. [2024-06-04 14:54:01,688 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. [2024-06-04 14:54:01,700 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 157 selfloop transitions, 11 changer transitions 0/172 dead transitions. [2024-06-04 14:54:01,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 172 transitions, 1844 flow [2024-06-04 14:54:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-04 14:54:01,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-04 14:54:01,702 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1483 flow. Second operand 6 states and 95 transitions. [2024-06-04 14:54:01,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 172 transitions, 1844 flow [2024-06-04 14:54:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 172 transitions, 1800 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:01,773 INFO L231 Difference]: Finished difference. Result has 141 places, 163 transitions, 1467 flow [2024-06-04 14:54:01,773 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} [2024-06-04 14:54:01,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 14:54:01,774 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 163 transitions, 1467 flow [2024-06-04 14:54:01,774 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) [2024-06-04 14:54:01,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:01,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:54:01,774 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)] === [2024-06-04 14:54:01,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2139116287, now seen corresponding path program 1 times [2024-06-04 14:54:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940983227] [2024-06-04 14:54:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940983227] [2024-06-04 14:54:02,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940983227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:02,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:02,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:02,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485533759] [2024-06-04 14:54:02,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:02,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:02,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:02,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:02,504 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) [2024-06-04 14:54:02,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:02,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:02,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:03,301 INFO L124 PetriNetUnfolderBase]: 2511/3785 cut-off events. [2024-06-04 14:54:03,301 INFO L125 PetriNetUnfolderBase]: For 144746/144746 co-relation queries the response was YES. [2024-06-04 14:54:03,314 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. [2024-06-04 14:54:03,326 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 163 selfloop transitions, 27 changer transitions 0/193 dead transitions. [2024-06-04 14:54:03,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 193 transitions, 2045 flow [2024-06-04 14:54:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-04 14:54:03,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:54:03,328 INFO L175 Difference]: Start difference. First operand has 141 places, 163 transitions, 1467 flow. Second operand 7 states and 119 transitions. [2024-06-04 14:54:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 193 transitions, 2045 flow [2024-06-04 14:54:03,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 193 transitions, 2015 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:03,402 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1568 flow [2024-06-04 14:54:03,403 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} [2024-06-04 14:54:03,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-04 14:54:03,403 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1568 flow [2024-06-04 14:54:03,403 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) [2024-06-04 14:54:03,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:03,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:03,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:54:03,404 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)] === [2024-06-04 14:54:03,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:03,404 INFO L85 PathProgramCache]: Analyzing trace with hash -838299070, now seen corresponding path program 1 times [2024-06-04 14:54:03,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:03,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859639548] [2024-06-04 14:54:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:03,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:04,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859639548] [2024-06-04 14:54:04,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859639548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104992265] [2024-06-04 14:54:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:04,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:04,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:04,401 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) [2024-06-04 14:54:04,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:04,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:04,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:05,138 INFO L124 PetriNetUnfolderBase]: 2520/3864 cut-off events. [2024-06-04 14:54:05,139 INFO L125 PetriNetUnfolderBase]: For 164905/164905 co-relation queries the response was YES. [2024-06-04 14:54:05,154 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. [2024-06-04 14:54:05,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 156 selfloop transitions, 45 changer transitions 0/212 dead transitions. [2024-06-04 14:54:05,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 212 transitions, 2158 flow [2024-06-04 14:54:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-04 14:54:05,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-04 14:54:05,170 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1568 flow. Second operand 9 states and 163 transitions. [2024-06-04 14:54:05,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 212 transitions, 2158 flow [2024-06-04 14:54:05,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 212 transitions, 2108 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:05,260 INFO L231 Difference]: Finished difference. Result has 150 places, 175 transitions, 1709 flow [2024-06-04 14:54:05,261 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} [2024-06-04 14:54:05,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 14:54:05,261 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 175 transitions, 1709 flow [2024-06-04 14:54:05,261 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) [2024-06-04 14:54:05,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:05,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:54:05,262 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)] === [2024-06-04 14:54:05,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1035224830, now seen corresponding path program 2 times [2024-06-04 14:54:05,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:05,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28648043] [2024-06-04 14:54:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:05,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:06,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:06,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28648043] [2024-06-04 14:54:06,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28648043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:06,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:06,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:06,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834232933] [2024-06-04 14:54:06,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:06,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:06,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:06,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:06,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:06,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:06,202 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) [2024-06-04 14:54:06,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:06,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:06,925 INFO L124 PetriNetUnfolderBase]: 2684/4130 cut-off events. [2024-06-04 14:54:06,925 INFO L125 PetriNetUnfolderBase]: For 185957/185957 co-relation queries the response was YES. [2024-06-04 14:54:06,942 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. [2024-06-04 14:54:06,955 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 47 changer transitions 0/223 dead transitions. [2024-06-04 14:54:06,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 223 transitions, 2486 flow [2024-06-04 14:54:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:54:06,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 14:54:06,957 INFO L175 Difference]: Start difference. First operand has 150 places, 175 transitions, 1709 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:54:06,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 223 transitions, 2486 flow [2024-06-04 14:54:07,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 223 transitions, 2387 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:07,076 INFO L231 Difference]: Finished difference. Result has 154 places, 179 transitions, 1822 flow [2024-06-04 14:54:07,077 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} [2024-06-04 14:54:07,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 14:54:07,077 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 179 transitions, 1822 flow [2024-06-04 14:54:07,077 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) [2024-06-04 14:54:07,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:07,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:07,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:54:07,078 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)] === [2024-06-04 14:54:07,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1358066477, now seen corresponding path program 2 times [2024-06-04 14:54:07,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:07,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218462392] [2024-06-04 14:54:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:07,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:07,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218462392] [2024-06-04 14:54:07,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218462392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:07,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:07,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:07,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952781684] [2024-06-04 14:54:07,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:07,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:07,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:07,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:07,735 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) [2024-06-04 14:54:07,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:07,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:07,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:08,617 INFO L124 PetriNetUnfolderBase]: 2788/4238 cut-off events. [2024-06-04 14:54:08,617 INFO L125 PetriNetUnfolderBase]: For 183642/183642 co-relation queries the response was YES. [2024-06-04 14:54:08,635 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. [2024-06-04 14:54:08,652 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 169 selfloop transitions, 29 changer transitions 0/201 dead transitions. [2024-06-04 14:54:08,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2375 flow [2024-06-04 14:54:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:54:08,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-04 14:54:08,655 INFO L175 Difference]: Start difference. First operand has 154 places, 179 transitions, 1822 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:54:08,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2375 flow [2024-06-04 14:54:08,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 201 transitions, 2297 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:08,804 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 1840 flow [2024-06-04 14:54:08,804 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} [2024-06-04 14:54:08,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-04 14:54:08,805 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 1840 flow [2024-06-04 14:54:08,805 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) [2024-06-04 14:54:08,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:08,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:08,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:54:08,805 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)] === [2024-06-04 14:54:08,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:08,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2139105685, now seen corresponding path program 1 times [2024-06-04 14:54:08,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:08,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778611981] [2024-06-04 14:54:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:08,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:09,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:09,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778611981] [2024-06-04 14:54:09,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778611981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:09,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:09,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:09,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324856673] [2024-06-04 14:54:09,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:09,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:09,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:09,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:09,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:09,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:09,553 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) [2024-06-04 14:54:09,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:09,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:09,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:10,439 INFO L124 PetriNetUnfolderBase]: 2793/4245 cut-off events. [2024-06-04 14:54:10,439 INFO L125 PetriNetUnfolderBase]: For 188382/188382 co-relation queries the response was YES. [2024-06-04 14:54:10,454 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. [2024-06-04 14:54:10,467 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 23 changer transitions 0/208 dead transitions. [2024-06-04 14:54:10,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 208 transitions, 2452 flow [2024-06-04 14:54:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:10,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-04 14:54:10,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:54:10,468 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 1840 flow. Second operand 7 states and 112 transitions. [2024-06-04 14:54:10,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 208 transitions, 2452 flow [2024-06-04 14:54:10,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 208 transitions, 2393 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:10,593 INFO L231 Difference]: Finished difference. Result has 160 places, 191 transitions, 1933 flow [2024-06-04 14:54:10,593 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} [2024-06-04 14:54:10,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-04 14:54:10,594 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 191 transitions, 1933 flow [2024-06-04 14:54:10,594 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) [2024-06-04 14:54:10,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:10,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:10,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:54:10,594 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)] === [2024-06-04 14:54:10,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:10,595 INFO L85 PathProgramCache]: Analyzing trace with hash -4017402, now seen corresponding path program 3 times [2024-06-04 14:54:10,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:10,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724691151] [2024-06-04 14:54:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:10,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:11,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:11,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:11,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724691151] [2024-06-04 14:54:11,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724691151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:11,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:11,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:11,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064306416] [2024-06-04 14:54:11,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:11,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:11,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:11,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:11,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:11,873 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) [2024-06-04 14:54:11,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:11,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:11,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:12,835 INFO L124 PetriNetUnfolderBase]: 2821/4357 cut-off events. [2024-06-04 14:54:12,835 INFO L125 PetriNetUnfolderBase]: For 213095/213110 co-relation queries the response was YES. [2024-06-04 14:54:12,854 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. [2024-06-04 14:54:12,869 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-04 14:54:12,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 239 transitions, 2602 flow [2024-06-04 14:54:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:12,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-04 14:54:12,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-04 14:54:12,871 INFO L175 Difference]: Start difference. First operand has 160 places, 191 transitions, 1933 flow. Second operand 10 states and 178 transitions. [2024-06-04 14:54:12,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 239 transitions, 2602 flow [2024-06-04 14:54:13,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 239 transitions, 2566 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:13,031 INFO L231 Difference]: Finished difference. Result has 169 places, 200 transitions, 2150 flow [2024-06-04 14:54:13,031 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} [2024-06-04 14:54:13,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 14:54:13,031 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 200 transitions, 2150 flow [2024-06-04 14:54:13,032 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) [2024-06-04 14:54:13,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:13,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:54:13,032 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)] === [2024-06-04 14:54:13,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1866771952, now seen corresponding path program 4 times [2024-06-04 14:54:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:13,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961378101] [2024-06-04 14:54:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:14,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:14,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961378101] [2024-06-04 14:54:14,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961378101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:14,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:14,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298846028] [2024-06-04 14:54:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:14,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:14,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:14,385 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) [2024-06-04 14:54:14,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:14,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:14,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:15,175 INFO L124 PetriNetUnfolderBase]: 2802/4330 cut-off events. [2024-06-04 14:54:15,175 INFO L125 PetriNetUnfolderBase]: For 213407/213413 co-relation queries the response was YES. [2024-06-04 14:54:15,195 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. [2024-06-04 14:54:15,209 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 169 selfloop transitions, 64 changer transitions 0/245 dead transitions. [2024-06-04 14:54:15,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 245 transitions, 2778 flow [2024-06-04 14:54:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:54:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:54:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-04 14:54:15,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-04 14:54:15,211 INFO L175 Difference]: Start difference. First operand has 169 places, 200 transitions, 2150 flow. Second operand 11 states and 192 transitions. [2024-06-04 14:54:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 245 transitions, 2778 flow [2024-06-04 14:54:15,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 245 transitions, 2610 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:15,383 INFO L231 Difference]: Finished difference. Result has 174 places, 202 transitions, 2136 flow [2024-06-04 14:54:15,383 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} [2024-06-04 14:54:15,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-04 14:54:15,384 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 202 transitions, 2136 flow [2024-06-04 14:54:15,384 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) [2024-06-04 14:54:15,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:15,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:15,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:54:15,384 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)] === [2024-06-04 14:54:15,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1866973762, now seen corresponding path program 5 times [2024-06-04 14:54:15,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:15,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551521974] [2024-06-04 14:54:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:15,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551521974] [2024-06-04 14:54:16,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551521974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:16,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:16,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:16,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888914917] [2024-06-04 14:54:16,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:16,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:16,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:16,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:16,376 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) [2024-06-04 14:54:16,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:16,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:17,177 INFO L124 PetriNetUnfolderBase]: 2899/4485 cut-off events. [2024-06-04 14:54:17,177 INFO L125 PetriNetUnfolderBase]: For 221417/221432 co-relation queries the response was YES. [2024-06-04 14:54:17,199 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. [2024-06-04 14:54:17,215 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 146 selfloop transitions, 83 changer transitions 0/241 dead transitions. [2024-06-04 14:54:17,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 2761 flow [2024-06-04 14:54:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:54:17,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:54:17,217 INFO L175 Difference]: Start difference. First operand has 174 places, 202 transitions, 2136 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:54:17,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 2761 flow [2024-06-04 14:54:17,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 241 transitions, 2591 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-04 14:54:17,390 INFO L231 Difference]: Finished difference. Result has 172 places, 206 transitions, 2205 flow [2024-06-04 14:54:17,390 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} [2024-06-04 14:54:17,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-04 14:54:17,391 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 206 transitions, 2205 flow [2024-06-04 14:54:17,391 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) [2024-06-04 14:54:17,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:17,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:17,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:54:17,391 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)] === [2024-06-04 14:54:17,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:17,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1866981202, now seen corresponding path program 6 times [2024-06-04 14:54:17,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834380000] [2024-06-04 14:54:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:18,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834380000] [2024-06-04 14:54:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834380000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:18,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:18,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:18,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338994318] [2024-06-04 14:54:18,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:18,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:18,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:18,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:18,344 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) [2024-06-04 14:54:18,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:18,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:18,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:19,185 INFO L124 PetriNetUnfolderBase]: 3018/4686 cut-off events. [2024-06-04 14:54:19,186 INFO L125 PetriNetUnfolderBase]: For 242197/242212 co-relation queries the response was YES. [2024-06-04 14:54:19,207 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. [2024-06-04 14:54:19,223 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 86 changer transitions 0/248 dead transitions. [2024-06-04 14:54:19,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 248 transitions, 3031 flow [2024-06-04 14:54:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:54:19,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-04 14:54:19,225 INFO L175 Difference]: Start difference. First operand has 172 places, 206 transitions, 2205 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:54:19,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 248 transitions, 3031 flow [2024-06-04 14:54:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 248 transitions, 2870 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:19,391 INFO L231 Difference]: Finished difference. Result has 176 places, 208 transitions, 2312 flow [2024-06-04 14:54:19,391 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} [2024-06-04 14:54:19,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-04 14:54:19,392 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 208 transitions, 2312 flow [2024-06-04 14:54:19,392 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) [2024-06-04 14:54:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:19,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:19,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:54:19,392 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)] === [2024-06-04 14:54:19,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash 607679540, now seen corresponding path program 7 times [2024-06-04 14:54:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404597220] [2024-06-04 14:54:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:20,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:20,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404597220] [2024-06-04 14:54:20,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404597220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:20,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:20,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:20,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560764821] [2024-06-04 14:54:20,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:20,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:20,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:20,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:20,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:20,383 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) [2024-06-04 14:54:20,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:20,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:20,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:21,349 INFO L124 PetriNetUnfolderBase]: 3154/4914 cut-off events. [2024-06-04 14:54:21,349 INFO L125 PetriNetUnfolderBase]: For 265133/265148 co-relation queries the response was YES. [2024-06-04 14:54:21,372 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. [2024-06-04 14:54:21,391 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 101 changer transitions 0/254 dead transitions. [2024-06-04 14:54:21,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 254 transitions, 3182 flow [2024-06-04 14:54:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:54:21,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-04 14:54:21,393 INFO L175 Difference]: Start difference. First operand has 176 places, 208 transitions, 2312 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:54:21,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 254 transitions, 3182 flow [2024-06-04 14:54:21,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 254 transitions, 3057 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:21,622 INFO L231 Difference]: Finished difference. Result has 181 places, 211 transitions, 2546 flow [2024-06-04 14:54:21,622 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} [2024-06-04 14:54:21,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-04 14:54:21,622 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 211 transitions, 2546 flow [2024-06-04 14:54:21,623 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) [2024-06-04 14:54:21,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:21,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:54:21,623 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)] === [2024-06-04 14:54:21,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash 341982260, now seen corresponding path program 8 times [2024-06-04 14:54:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:21,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142408564] [2024-06-04 14:54:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:21,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142408564] [2024-06-04 14:54:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142408564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:22,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:22,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721488144] [2024-06-04 14:54:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:22,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:22,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:22,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:22,620 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) [2024-06-04 14:54:22,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:22,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:22,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:23,488 INFO L124 PetriNetUnfolderBase]: 3212/5012 cut-off events. [2024-06-04 14:54:23,489 INFO L125 PetriNetUnfolderBase]: For 279279/279294 co-relation queries the response was YES. [2024-06-04 14:54:23,586 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. [2024-06-04 14:54:23,601 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 86 changer transitions 0/253 dead transitions. [2024-06-04 14:54:23,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 253 transitions, 3359 flow [2024-06-04 14:54:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 14:54:23,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-04 14:54:23,606 INFO L175 Difference]: Start difference. First operand has 181 places, 211 transitions, 2546 flow. Second operand 9 states and 169 transitions. [2024-06-04 14:54:23,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 253 transitions, 3359 flow [2024-06-04 14:54:23,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 253 transitions, 3281 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:23,800 INFO L231 Difference]: Finished difference. Result has 186 places, 212 transitions, 2696 flow [2024-06-04 14:54:23,800 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} [2024-06-04 14:54:23,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-04 14:54:23,801 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 212 transitions, 2696 flow [2024-06-04 14:54:23,801 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) [2024-06-04 14:54:23,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:23,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:23,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:54:23,802 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)] === [2024-06-04 14:54:23,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:23,802 INFO L85 PathProgramCache]: Analyzing trace with hash 840850624, now seen corresponding path program 9 times [2024-06-04 14:54:23,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:23,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655382926] [2024-06-04 14:54:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:23,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:24,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655382926] [2024-06-04 14:54:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655382926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:24,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:24,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:24,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931896587] [2024-06-04 14:54:24,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:24,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:24,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:24,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:24,761 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) [2024-06-04 14:54:24,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:24,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:24,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:25,662 INFO L124 PetriNetUnfolderBase]: 3237/5059 cut-off events. [2024-06-04 14:54:25,663 INFO L125 PetriNetUnfolderBase]: For 288576/288591 co-relation queries the response was YES. [2024-06-04 14:54:25,690 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. [2024-06-04 14:54:25,709 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 86 changer transitions 0/249 dead transitions. [2024-06-04 14:54:25,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 249 transitions, 3335 flow [2024-06-04 14:54:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:54:25,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-04 14:54:25,711 INFO L175 Difference]: Start difference. First operand has 186 places, 212 transitions, 2696 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:54:25,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 249 transitions, 3335 flow [2024-06-04 14:54:25,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 249 transitions, 2927 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-04 14:54:25,986 INFO L231 Difference]: Finished difference. Result has 185 places, 214 transitions, 2533 flow [2024-06-04 14:54:25,987 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} [2024-06-04 14:54:25,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-04 14:54:25,987 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 214 transitions, 2533 flow [2024-06-04 14:54:25,987 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) [2024-06-04 14:54:25,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:25,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:25,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:54:25,988 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)] === [2024-06-04 14:54:25,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash -531382269, now seen corresponding path program 3 times [2024-06-04 14:54:25,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:25,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024100734] [2024-06-04 14:54:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:25,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024100734] [2024-06-04 14:54:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024100734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:26,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:26,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885476100] [2024-06-04 14:54:26,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:26,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:26,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:26,770 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) [2024-06-04 14:54:26,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:26,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:26,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:27,631 INFO L124 PetriNetUnfolderBase]: 3339/5159 cut-off events. [2024-06-04 14:54:27,632 INFO L125 PetriNetUnfolderBase]: For 275418/275433 co-relation queries the response was YES. [2024-06-04 14:54:27,658 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. [2024-06-04 14:54:27,676 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 29 changer transitions 0/225 dead transitions. [2024-06-04 14:54:27,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 225 transitions, 3007 flow [2024-06-04 14:54:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-04 14:54:27,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-04 14:54:27,678 INFO L175 Difference]: Start difference. First operand has 185 places, 214 transitions, 2533 flow. Second operand 7 states and 108 transitions. [2024-06-04 14:54:27,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 225 transitions, 3007 flow [2024-06-04 14:54:27,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 225 transitions, 2760 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 14:54:27,931 INFO L231 Difference]: Finished difference. Result has 184 places, 214 transitions, 2350 flow [2024-06-04 14:54:27,931 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} [2024-06-04 14:54:27,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 14:54:27,932 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 214 transitions, 2350 flow [2024-06-04 14:54:27,932 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) [2024-06-04 14:54:27,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:27,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:27,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:54:27,932 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)] === [2024-06-04 14:54:27,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1784842645, now seen corresponding path program 2 times [2024-06-04 14:54:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:27,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543081872] [2024-06-04 14:54:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:27,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:28,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543081872] [2024-06-04 14:54:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543081872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:28,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652387041] [2024-06-04 14:54:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:28,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:28,663 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) [2024-06-04 14:54:28,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:28,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:28,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:29,612 INFO L124 PetriNetUnfolderBase]: 3344/5164 cut-off events. [2024-06-04 14:54:29,612 INFO L125 PetriNetUnfolderBase]: For 279037/279049 co-relation queries the response was YES. [2024-06-04 14:54:29,640 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. [2024-06-04 14:54:29,658 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 199 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-04 14:54:29,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2961 flow [2024-06-04 14:54:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-04 14:54:29,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-04 14:54:29,660 INFO L175 Difference]: Start difference. First operand has 184 places, 214 transitions, 2350 flow. Second operand 7 states and 106 transitions. [2024-06-04 14:54:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2961 flow [2024-06-04 14:54:29,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 228 transitions, 2871 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:29,909 INFO L231 Difference]: Finished difference. Result has 184 places, 217 transitions, 2360 flow [2024-06-04 14:54:29,909 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} [2024-06-04 14:54:29,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 14:54:29,910 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 217 transitions, 2360 flow [2024-06-04 14:54:29,910 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) [2024-06-04 14:54:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:29,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:54:29,910 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)] === [2024-06-04 14:54:29,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1784426935, now seen corresponding path program 3 times [2024-06-04 14:54:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264564439] [2024-06-04 14:54:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264564439] [2024-06-04 14:54:30,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264564439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:30,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:30,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:30,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037946972] [2024-06-04 14:54:30,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:30,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:30,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:30,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:30,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:30,602 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) [2024-06-04 14:54:30,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:30,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:30,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:31,503 INFO L124 PetriNetUnfolderBase]: 3341/5160 cut-off events. [2024-06-04 14:54:31,503 INFO L125 PetriNetUnfolderBase]: For 288047/288059 co-relation queries the response was YES. [2024-06-04 14:54:31,528 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. [2024-06-04 14:54:31,544 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 27 changer transitions 0/227 dead transitions. [2024-06-04 14:54:31,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 227 transitions, 2835 flow [2024-06-04 14:54:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-04 14:54:31,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-04 14:54:31,546 INFO L175 Difference]: Start difference. First operand has 184 places, 217 transitions, 2360 flow. Second operand 7 states and 104 transitions. [2024-06-04 14:54:31,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 227 transitions, 2835 flow [2024-06-04 14:54:31,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 227 transitions, 2739 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:31,800 INFO L231 Difference]: Finished difference. Result has 187 places, 217 transitions, 2324 flow [2024-06-04 14:54:31,800 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} [2024-06-04 14:54:31,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 14:54:31,801 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 217 transitions, 2324 flow [2024-06-04 14:54:31,801 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) [2024-06-04 14:54:31,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:31,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:31,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:54:31,802 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)] === [2024-06-04 14:54:31,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1530015665, now seen corresponding path program 1 times [2024-06-04 14:54:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:31,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278410220] [2024-06-04 14:54:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:32,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:32,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278410220] [2024-06-04 14:54:32,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278410220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:32,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:32,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698997770] [2024-06-04 14:54:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:32,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:32,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:32,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:32,703 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) [2024-06-04 14:54:32,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:32,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:32,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:33,594 INFO L124 PetriNetUnfolderBase]: 3175/4989 cut-off events. [2024-06-04 14:54:33,595 INFO L125 PetriNetUnfolderBase]: For 259467/259467 co-relation queries the response was YES. [2024-06-04 14:54:33,616 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. [2024-06-04 14:54:33,630 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 214 selfloop transitions, 14 changer transitions 0/236 dead transitions. [2024-06-04 14:54:33,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 236 transitions, 2873 flow [2024-06-04 14:54:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:33,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-04 14:54:33,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-04 14:54:33,631 INFO L175 Difference]: Start difference. First operand has 187 places, 217 transitions, 2324 flow. Second operand 7 states and 113 transitions. [2024-06-04 14:54:33,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 236 transitions, 2873 flow [2024-06-04 14:54:33,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 236 transitions, 2821 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:33,881 INFO L231 Difference]: Finished difference. Result has 189 places, 220 transitions, 2362 flow [2024-06-04 14:54:33,881 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} [2024-06-04 14:54:33,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-04 14:54:33,882 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 220 transitions, 2362 flow [2024-06-04 14:54:33,882 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) [2024-06-04 14:54:33,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:33,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:54:33,883 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)] === [2024-06-04 14:54:33,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:33,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1120700919, now seen corresponding path program 1 times [2024-06-04 14:54:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417873544] [2024-06-04 14:54:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:34,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:34,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417873544] [2024-06-04 14:54:34,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417873544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:34,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:34,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:34,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538148490] [2024-06-04 14:54:34,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:34,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:34,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:34,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:34,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:34,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:34,661 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) [2024-06-04 14:54:34,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:34,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:34,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:35,371 INFO L124 PetriNetUnfolderBase]: 3193/5016 cut-off events. [2024-06-04 14:54:35,371 INFO L125 PetriNetUnfolderBase]: For 271194/271194 co-relation queries the response was YES. [2024-06-04 14:54:35,400 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. [2024-06-04 14:54:35,420 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 25 changer transitions 0/245 dead transitions. [2024-06-04 14:54:35,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 245 transitions, 3047 flow [2024-06-04 14:54:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-04 14:54:35,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-04 14:54:35,421 INFO L175 Difference]: Start difference. First operand has 189 places, 220 transitions, 2362 flow. Second operand 7 states and 117 transitions. [2024-06-04 14:54:35,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 245 transitions, 3047 flow [2024-06-04 14:54:35,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 245 transitions, 2979 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:35,670 INFO L231 Difference]: Finished difference. Result has 192 places, 229 transitions, 2446 flow [2024-06-04 14:54:35,670 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} [2024-06-04 14:54:35,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-04 14:54:35,679 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 229 transitions, 2446 flow [2024-06-04 14:54:35,680 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) [2024-06-04 14:54:35,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:35,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:35,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:54:35,680 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)] === [2024-06-04 14:54:35,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1961789839, now seen corresponding path program 2 times [2024-06-04 14:54:35,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:35,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807063930] [2024-06-04 14:54:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:36,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:36,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807063930] [2024-06-04 14:54:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807063930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:36,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125047011] [2024-06-04 14:54:36,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:36,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:36,528 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) [2024-06-04 14:54:36,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:36,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:37,282 INFO L124 PetriNetUnfolderBase]: 3198/5023 cut-off events. [2024-06-04 14:54:37,282 INFO L125 PetriNetUnfolderBase]: For 280721/280721 co-relation queries the response was YES. [2024-06-04 14:54:37,310 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. [2024-06-04 14:54:37,328 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 26 changer transitions 0/249 dead transitions. [2024-06-04 14:54:37,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 249 transitions, 3179 flow [2024-06-04 14:54:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-04 14:54:37,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-04 14:54:37,330 INFO L175 Difference]: Start difference. First operand has 192 places, 229 transitions, 2446 flow. Second operand 7 states and 115 transitions. [2024-06-04 14:54:37,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 249 transitions, 3179 flow [2024-06-04 14:54:37,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 249 transitions, 3143 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:37,607 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2590 flow [2024-06-04 14:54:37,607 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} [2024-06-04 14:54:37,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 14:54:37,608 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2590 flow [2024-06-04 14:54:37,608 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) [2024-06-04 14:54:37,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:37,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:37,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:54:37,608 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)] === [2024-06-04 14:54:37,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:37,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1730388815, now seen corresponding path program 3 times [2024-06-04 14:54:37,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:37,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111161719] [2024-06-04 14:54:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:37,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:38,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:38,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111161719] [2024-06-04 14:54:38,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111161719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:38,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:38,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:38,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993870800] [2024-06-04 14:54:38,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:38,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:38,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:38,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:38,454 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) [2024-06-04 14:54:38,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:38,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:38,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:39,268 INFO L124 PetriNetUnfolderBase]: 3209/5038 cut-off events. [2024-06-04 14:54:39,268 INFO L125 PetriNetUnfolderBase]: For 292438/292438 co-relation queries the response was YES. [2024-06-04 14:54:39,294 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. [2024-06-04 14:54:39,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 223 selfloop transitions, 14 changer transitions 0/245 dead transitions. [2024-06-04 14:54:39,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 245 transitions, 3091 flow [2024-06-04 14:54:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-04 14:54:39,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-04 14:54:39,311 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2590 flow. Second operand 7 states and 107 transitions. [2024-06-04 14:54:39,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 245 transitions, 3091 flow [2024-06-04 14:54:39,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 245 transitions, 2981 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:39,620 INFO L231 Difference]: Finished difference. Result has 201 places, 235 transitions, 2514 flow [2024-06-04 14:54:39,621 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} [2024-06-04 14:54:39,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-04 14:54:39,621 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 235 transitions, 2514 flow [2024-06-04 14:54:39,621 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) [2024-06-04 14:54:39,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:39,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:39,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:54:39,622 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)] === [2024-06-04 14:54:39,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1957141513, now seen corresponding path program 2 times [2024-06-04 14:54:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883152947] [2024-06-04 14:54:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:39,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883152947] [2024-06-04 14:54:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883152947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:40,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:40,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:40,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382591170] [2024-06-04 14:54:40,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:40,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:40,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:40,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:40,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:40,517 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) [2024-06-04 14:54:40,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:40,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:40,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:41,331 INFO L124 PetriNetUnfolderBase]: 3210/5040 cut-off events. [2024-06-04 14:54:41,332 INFO L125 PetriNetUnfolderBase]: For 303098/303098 co-relation queries the response was YES. [2024-06-04 14:54:41,361 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. [2024-06-04 14:54:41,379 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 224 selfloop transitions, 18 changer transitions 0/250 dead transitions. [2024-06-04 14:54:41,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 250 transitions, 3079 flow [2024-06-04 14:54:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-04 14:54:41,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-04 14:54:41,382 INFO L175 Difference]: Start difference. First operand has 201 places, 235 transitions, 2514 flow. Second operand 8 states and 117 transitions. [2024-06-04 14:54:41,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 250 transitions, 3079 flow [2024-06-04 14:54:41,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 250 transitions, 3031 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:41,733 INFO L231 Difference]: Finished difference. Result has 204 places, 240 transitions, 2575 flow [2024-06-04 14:54:41,733 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} [2024-06-04 14:54:41,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-04 14:54:41,734 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 240 transitions, 2575 flow [2024-06-04 14:54:41,734 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) [2024-06-04 14:54:41,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:41,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:54:41,745 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)] === [2024-06-04 14:54:41,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1784658133, now seen corresponding path program 3 times [2024-06-04 14:54:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:41,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875215592] [2024-06-04 14:54:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:41,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:42,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875215592] [2024-06-04 14:54:42,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875215592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:42,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113770994] [2024-06-04 14:54:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:42,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:42,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:42,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:42,589 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) [2024-06-04 14:54:42,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:42,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:42,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:43,368 INFO L124 PetriNetUnfolderBase]: 3204/5032 cut-off events. [2024-06-04 14:54:43,369 INFO L125 PetriNetUnfolderBase]: For 309129/309129 co-relation queries the response was YES. [2024-06-04 14:54:43,396 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. [2024-06-04 14:54:43,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 22 changer transitions 0/251 dead transitions. [2024-06-04 14:54:43,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 251 transitions, 3091 flow [2024-06-04 14:54:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-04 14:54:43,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-04 14:54:43,415 INFO L175 Difference]: Start difference. First operand has 204 places, 240 transitions, 2575 flow. Second operand 7 states and 111 transitions. [2024-06-04 14:54:43,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 251 transitions, 3091 flow [2024-06-04 14:54:43,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 251 transitions, 3021 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:43,747 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 2555 flow [2024-06-04 14:54:43,747 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} [2024-06-04 14:54:43,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-04 14:54:43,748 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 2555 flow [2024-06-04 14:54:43,748 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) [2024-06-04 14:54:43,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:43,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:43,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:54:43,749 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)] === [2024-06-04 14:54:43,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:43,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2029040111, now seen corresponding path program 1 times [2024-06-04 14:54:43,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:43,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52493949] [2024-06-04 14:54:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:43,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52493949] [2024-06-04 14:54:45,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52493949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:45,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:45,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:54:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416094332] [2024-06-04 14:54:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:54:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:54:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:54:45,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:45,166 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) [2024-06-04 14:54:45,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:45,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:45,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:46,088 INFO L124 PetriNetUnfolderBase]: 3333/5195 cut-off events. [2024-06-04 14:54:46,089 INFO L125 PetriNetUnfolderBase]: For 385219/385219 co-relation queries the response was YES. [2024-06-04 14:54:46,132 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. [2024-06-04 14:54:46,153 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 22 changer transitions 0/284 dead transitions. [2024-06-04 14:54:46,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 284 transitions, 3262 flow [2024-06-04 14:54:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-04 14:54:46,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-04 14:54:46,173 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 2555 flow. Second operand 10 states and 170 transitions. [2024-06-04 14:54:46,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 284 transitions, 3262 flow [2024-06-04 14:54:46,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 284 transitions, 3193 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:46,561 INFO L231 Difference]: Finished difference. Result has 211 places, 243 transitions, 2601 flow [2024-06-04 14:54:46,561 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} [2024-06-04 14:54:46,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-04 14:54:46,562 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 243 transitions, 2601 flow [2024-06-04 14:54:46,562 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) [2024-06-04 14:54:46,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:46,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:46,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:54:46,562 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)] === [2024-06-04 14:54:46,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2087247881, now seen corresponding path program 2 times [2024-06-04 14:54:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836684831] [2024-06-04 14:54:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:47,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836684831] [2024-06-04 14:54:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836684831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:47,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:47,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:54:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438662213] [2024-06-04 14:54:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:47,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:54:47,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:54:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:54:48,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:48,076 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) [2024-06-04 14:54:48,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:48,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:48,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:49,084 INFO L124 PetriNetUnfolderBase]: 3369/5261 cut-off events. [2024-06-04 14:54:49,085 INFO L125 PetriNetUnfolderBase]: For 397012/397012 co-relation queries the response was YES. [2024-06-04 14:54:49,116 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. [2024-06-04 14:54:49,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 29 changer transitions 0/287 dead transitions. [2024-06-04 14:54:49,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 3317 flow [2024-06-04 14:54:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-04 14:54:49,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-04 14:54:49,137 INFO L175 Difference]: Start difference. First operand has 211 places, 243 transitions, 2601 flow. Second operand 10 states and 172 transitions. [2024-06-04 14:54:49,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 3317 flow [2024-06-04 14:54:49,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 287 transitions, 3231 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:49,567 INFO L231 Difference]: Finished difference. Result has 216 places, 246 transitions, 2653 flow [2024-06-04 14:54:49,568 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} [2024-06-04 14:54:49,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 14:54:49,568 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 246 transitions, 2653 flow [2024-06-04 14:54:49,568 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) [2024-06-04 14:54:49,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:49,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:49,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:54:49,569 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)] === [2024-06-04 14:54:49,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash 618593287, now seen corresponding path program 3 times [2024-06-04 14:54:49,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:49,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476273731] [2024-06-04 14:54:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:49,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:50,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:50,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476273731] [2024-06-04 14:54:50,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476273731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:50,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:50,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:54:50,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130777348] [2024-06-04 14:54:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:50,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:54:50,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:54:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:54:51,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:54:51,006 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) [2024-06-04 14:54:51,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:51,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:54:51,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:52,125 INFO L124 PetriNetUnfolderBase]: 3410/5332 cut-off events. [2024-06-04 14:54:52,125 INFO L125 PetriNetUnfolderBase]: For 415743/415743 co-relation queries the response was YES. [2024-06-04 14:54:52,159 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. [2024-06-04 14:54:52,179 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 243 selfloop transitions, 32 changer transitions 0/290 dead transitions. [2024-06-04 14:54:52,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 290 transitions, 3380 flow [2024-06-04 14:54:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-04 14:54:52,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-04 14:54:52,181 INFO L175 Difference]: Start difference. First operand has 216 places, 246 transitions, 2653 flow. Second operand 10 states and 173 transitions. [2024-06-04 14:54:52,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 290 transitions, 3380 flow [2024-06-04 14:54:52,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 290 transitions, 3294 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:52,636 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2713 flow [2024-06-04 14:54:52,637 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} [2024-06-04 14:54:52,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-04 14:54:52,637 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2713 flow [2024-06-04 14:54:52,637 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) [2024-06-04 14:54:52,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:52,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:52,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:54:52,638 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)] === [2024-06-04 14:54:52,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:52,639 INFO L85 PathProgramCache]: Analyzing trace with hash -849928203, now seen corresponding path program 1 times [2024-06-04 14:54:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730622968] [2024-06-04 14:54:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:52,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:53,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:53,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730622968] [2024-06-04 14:54:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730622968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:53,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189193081] [2024-06-04 14:54:53,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:53,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:53,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:53,404 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) [2024-06-04 14:54:53,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:53,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:53,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:54,527 INFO L124 PetriNetUnfolderBase]: 3510/5436 cut-off events. [2024-06-04 14:54:54,528 INFO L125 PetriNetUnfolderBase]: For 415910/415910 co-relation queries the response was YES. [2024-06-04 14:54:54,560 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. [2024-06-04 14:54:54,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 44 changer transitions 0/280 dead transitions. [2024-06-04 14:54:54,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 280 transitions, 3520 flow [2024-06-04 14:54:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:54:54,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 14:54:54,580 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2713 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:54:54,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 280 transitions, 3520 flow [2024-06-04 14:54:54,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 280 transitions, 3402 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-04 14:54:54,990 INFO L231 Difference]: Finished difference. Result has 221 places, 255 transitions, 2763 flow [2024-06-04 14:54:54,990 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} [2024-06-04 14:54:54,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-04 14:54:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 255 transitions, 2763 flow [2024-06-04 14:54:54,991 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) [2024-06-04 14:54:54,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:54,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:54,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:54:54,991 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)] === [2024-06-04 14:54:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1893487520, now seen corresponding path program 1 times [2024-06-04 14:54:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822826003] [2024-06-04 14:54:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:55,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:55,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822826003] [2024-06-04 14:54:55,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822826003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:55,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:55,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:55,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593321345] [2024-06-04 14:54:55,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:55,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:55,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:55,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:55,754 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) [2024-06-04 14:54:55,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:55,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:55,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:56,635 INFO L124 PetriNetUnfolderBase]: 3523/5454 cut-off events. [2024-06-04 14:54:56,635 INFO L125 PetriNetUnfolderBase]: For 427247/427247 co-relation queries the response was YES. [2024-06-04 14:54:56,668 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. [2024-06-04 14:54:56,687 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 252 selfloop transitions, 25 changer transitions 0/280 dead transitions. [2024-06-04 14:54:56,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 280 transitions, 3576 flow [2024-06-04 14:54:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 14:54:56,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-04 14:54:56,689 INFO L175 Difference]: Start difference. First operand has 221 places, 255 transitions, 2763 flow. Second operand 7 states and 114 transitions. [2024-06-04 14:54:56,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 280 transitions, 3576 flow [2024-06-04 14:54:57,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 280 transitions, 3507 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:57,200 INFO L231 Difference]: Finished difference. Result has 224 places, 261 transitions, 2848 flow [2024-06-04 14:54:57,200 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} [2024-06-04 14:54:57,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-04 14:54:57,201 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 261 transitions, 2848 flow [2024-06-04 14:54:57,201 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) [2024-06-04 14:54:57,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:57,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:57,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:54:57,201 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)] === [2024-06-04 14:54:57,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash 133548098, now seen corresponding path program 2 times [2024-06-04 14:54:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:57,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142762775] [2024-06-04 14:54:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142762775] [2024-06-04 14:54:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142762775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:57,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272122699] [2024-06-04 14:54:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:57,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:54:57,985 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) [2024-06-04 14:54:57,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:57,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:54:57,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:58,918 INFO L124 PetriNetUnfolderBase]: 3528/5461 cut-off events. [2024-06-04 14:54:58,918 INFO L125 PetriNetUnfolderBase]: For 442136/442136 co-relation queries the response was YES. [2024-06-04 14:54:58,955 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. [2024-06-04 14:54:58,976 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 20 changer transitions 0/279 dead transitions. [2024-06-04 14:54:58,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 279 transitions, 3495 flow [2024-06-04 14:54:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-04 14:54:58,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-04 14:54:58,978 INFO L175 Difference]: Start difference. First operand has 224 places, 261 transitions, 2848 flow. Second operand 7 states and 109 transitions. [2024-06-04 14:54:58,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 279 transitions, 3495 flow [2024-06-04 14:54:59,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 279 transitions, 3391 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:59,571 INFO L231 Difference]: Finished difference. Result has 228 places, 264 transitions, 2848 flow [2024-06-04 14:54:59,572 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} [2024-06-04 14:54:59,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 14:54:59,572 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 2848 flow [2024-06-04 14:54:59,572 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) [2024-06-04 14:54:59,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:59,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:59,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:54:59,573 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)] === [2024-06-04 14:54:59,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:59,573 INFO L85 PathProgramCache]: Analyzing trace with hash -394608631, now seen corresponding path program 4 times [2024-06-04 14:54:59,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:59,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680768705] [2024-06-04 14:54:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:59,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:00,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:00,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680768705] [2024-06-04 14:55:00,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680768705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:00,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:00,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552812816] [2024-06-04 14:55:00,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:00,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:00,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:00,797 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) [2024-06-04 14:55:00,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:00,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:00,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:01,816 INFO L124 PetriNetUnfolderBase]: 3416/5335 cut-off events. [2024-06-04 14:55:01,817 INFO L125 PetriNetUnfolderBase]: For 456244/456246 co-relation queries the response was YES. [2024-06-04 14:55:01,851 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. [2024-06-04 14:55:01,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 46 changer transitions 0/299 dead transitions. [2024-06-04 14:55:01,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 299 transitions, 3508 flow [2024-06-04 14:55:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:55:01,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:55:01,872 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 2848 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:55:01,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 299 transitions, 3508 flow [2024-06-04 14:55:02,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 299 transitions, 3434 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:02,328 INFO L231 Difference]: Finished difference. Result has 233 places, 265 transitions, 2893 flow [2024-06-04 14:55:02,328 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} [2024-06-04 14:55:02,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-04 14:55:02,329 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 265 transitions, 2893 flow [2024-06-04 14:55:02,329 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) [2024-06-04 14:55:02,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:02,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:02,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:55:02,329 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)] === [2024-06-04 14:55:02,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1447821155, now seen corresponding path program 5 times [2024-06-04 14:55:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881599138] [2024-06-04 14:55:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:03,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881599138] [2024-06-04 14:55:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881599138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:03,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:03,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:03,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213079506] [2024-06-04 14:55:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:03,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:03,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:03,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:03,598 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) [2024-06-04 14:55:03,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:03,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:03,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:04,697 INFO L124 PetriNetUnfolderBase]: 3459/5410 cut-off events. [2024-06-04 14:55:04,697 INFO L125 PetriNetUnfolderBase]: For 472271/472271 co-relation queries the response was YES. [2024-06-04 14:55:04,734 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. [2024-06-04 14:55:04,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 51 changer transitions 0/302 dead transitions. [2024-06-04 14:55:04,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 302 transitions, 3623 flow [2024-06-04 14:55:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-04 14:55:04,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-04 14:55:04,756 INFO L175 Difference]: Start difference. First operand has 233 places, 265 transitions, 2893 flow. Second operand 9 states and 157 transitions. [2024-06-04 14:55:04,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 302 transitions, 3623 flow [2024-06-04 14:55:05,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 302 transitions, 3511 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:05,211 INFO L231 Difference]: Finished difference. Result has 236 places, 268 transitions, 2984 flow [2024-06-04 14:55:05,211 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} [2024-06-04 14:55:05,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-04 14:55:05,212 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 268 transitions, 2984 flow [2024-06-04 14:55:05,212 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) [2024-06-04 14:55:05,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:05,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:55:05,212 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)] === [2024-06-04 14:55:05,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2113456400, now seen corresponding path program 1 times [2024-06-04 14:55:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032367186] [2024-06-04 14:55:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:05,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:05,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032367186] [2024-06-04 14:55:05,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032367186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:05,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:05,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:05,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582580621] [2024-06-04 14:55:05,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:05,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:05,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:05,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:05,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:06,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:06,035 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) [2024-06-04 14:55:06,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:06,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:06,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:07,262 INFO L124 PetriNetUnfolderBase]: 3559/5514 cut-off events. [2024-06-04 14:55:07,263 INFO L125 PetriNetUnfolderBase]: For 459488/459488 co-relation queries the response was YES. [2024-06-04 14:55:07,298 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. [2024-06-04 14:55:07,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 35 changer transitions 0/293 dead transitions. [2024-06-04 14:55:07,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 293 transitions, 3835 flow [2024-06-04 14:55:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:55:07,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:55:07,320 INFO L175 Difference]: Start difference. First operand has 236 places, 268 transitions, 2984 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:55:07,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 293 transitions, 3835 flow [2024-06-04 14:55:07,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 293 transitions, 3680 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:07,763 INFO L231 Difference]: Finished difference. Result has 238 places, 274 transitions, 3009 flow [2024-06-04 14:55:07,763 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} [2024-06-04 14:55:07,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 14:55:07,764 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 274 transitions, 3009 flow [2024-06-04 14:55:07,764 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) [2024-06-04 14:55:07,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:07,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:07,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:55:07,764 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)] === [2024-06-04 14:55:07,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1887766067, now seen corresponding path program 2 times [2024-06-04 14:55:07,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:07,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006459256] [2024-06-04 14:55:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:07,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:08,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:08,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006459256] [2024-06-04 14:55:08,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006459256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:08,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:08,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:08,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757046693] [2024-06-04 14:55:08,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:08,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:08,618 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) [2024-06-04 14:55:08,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:08,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:08,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:09,644 INFO L124 PetriNetUnfolderBase]: 3585/5550 cut-off events. [2024-06-04 14:55:09,644 INFO L125 PetriNetUnfolderBase]: For 458912/458912 co-relation queries the response was YES. [2024-06-04 14:55:09,681 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. [2024-06-04 14:55:09,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 48 changer transitions 0/301 dead transitions. [2024-06-04 14:55:09,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 301 transitions, 3971 flow [2024-06-04 14:55:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:55:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 14:55:09,702 INFO L175 Difference]: Start difference. First operand has 238 places, 274 transitions, 3009 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:55:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 301 transitions, 3971 flow [2024-06-04 14:55:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 301 transitions, 3904 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:55:10,178 INFO L231 Difference]: Finished difference. Result has 242 places, 280 transitions, 3112 flow [2024-06-04 14:55:10,178 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} [2024-06-04 14:55:10,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-04 14:55:10,178 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 280 transitions, 3112 flow [2024-06-04 14:55:10,179 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) [2024-06-04 14:55:10,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:10,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:10,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:55:10,179 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)] === [2024-06-04 14:55:10,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1887777227, now seen corresponding path program 3 times [2024-06-04 14:55:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:10,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461392976] [2024-06-04 14:55:10,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:10,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:10,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461392976] [2024-06-04 14:55:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461392976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:10,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249298157] [2024-06-04 14:55:10,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:10,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:10,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:10,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:10,949 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) [2024-06-04 14:55:10,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:10,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:10,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:12,145 INFO L124 PetriNetUnfolderBase]: 3579/5542 cut-off events. [2024-06-04 14:55:12,145 INFO L125 PetriNetUnfolderBase]: For 468741/468741 co-relation queries the response was YES. [2024-06-04 14:55:12,183 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. [2024-06-04 14:55:12,205 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-04 14:55:12,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 300 transitions, 3884 flow [2024-06-04 14:55:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-04 14:55:12,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-04 14:55:12,213 INFO L175 Difference]: Start difference. First operand has 242 places, 280 transitions, 3112 flow. Second operand 8 states and 131 transitions. [2024-06-04 14:55:12,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 300 transitions, 3884 flow [2024-06-04 14:55:12,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 300 transitions, 3782 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 14:55:12,819 INFO L231 Difference]: Finished difference. Result has 246 places, 280 transitions, 3110 flow [2024-06-04 14:55:12,820 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} [2024-06-04 14:55:12,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 14:55:12,820 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 280 transitions, 3110 flow [2024-06-04 14:55:12,820 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) [2024-06-04 14:55:12,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:12,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:12,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:55:12,821 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)] === [2024-06-04 14:55:12,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:12,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2043342222, now seen corresponding path program 3 times [2024-06-04 14:55:12,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:12,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657031243] [2024-06-04 14:55:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:12,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:13,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:13,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657031243] [2024-06-04 14:55:13,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657031243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:13,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:13,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:55:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229199848] [2024-06-04 14:55:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:55:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:55:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:55:13,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:13,590 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) [2024-06-04 14:55:13,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:13,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:13,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:14,441 INFO L124 PetriNetUnfolderBase]: 3584/5550 cut-off events. [2024-06-04 14:55:14,441 INFO L125 PetriNetUnfolderBase]: For 481071/481077 co-relation queries the response was YES. [2024-06-04 14:55:14,479 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. [2024-06-04 14:55:14,498 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 41 changer transitions 0/304 dead transitions. [2024-06-04 14:55:14,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 304 transitions, 4117 flow [2024-06-04 14:55:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:55:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:55:14,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-04 14:55:14,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-04 14:55:14,499 INFO L175 Difference]: Start difference. First operand has 246 places, 280 transitions, 3110 flow. Second operand 7 states and 114 transitions. [2024-06-04 14:55:14,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 304 transitions, 4117 flow [2024-06-04 14:55:15,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 304 transitions, 4015 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:15,048 INFO L231 Difference]: Finished difference. Result has 246 places, 286 transitions, 3210 flow [2024-06-04 14:55:15,049 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} [2024-06-04 14:55:15,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 14:55:15,049 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 286 transitions, 3210 flow [2024-06-04 14:55:15,049 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) [2024-06-04 14:55:15,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:15,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:15,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:55:15,050 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)] === [2024-06-04 14:55:15,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:15,050 INFO L85 PathProgramCache]: Analyzing trace with hash -685949856, now seen corresponding path program 4 times [2024-06-04 14:55:15,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:15,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781305989] [2024-06-04 14:55:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:15,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781305989] [2024-06-04 14:55:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781305989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:15,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:15,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:55:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673566731] [2024-06-04 14:55:15,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:55:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:55:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:55:15,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:15,835 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) [2024-06-04 14:55:15,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:15,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:15,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:16,760 INFO L124 PetriNetUnfolderBase]: 3589/5558 cut-off events. [2024-06-04 14:55:16,761 INFO L125 PetriNetUnfolderBase]: For 496871/496883 co-relation queries the response was YES. [2024-06-04 14:55:16,799 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. [2024-06-04 14:55:16,820 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 44 changer transitions 0/303 dead transitions. [2024-06-04 14:55:16,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 303 transitions, 4035 flow [2024-06-04 14:55:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:55:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:55:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-04 14:55:16,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-04 14:55:16,821 INFO L175 Difference]: Start difference. First operand has 246 places, 286 transitions, 3210 flow. Second operand 7 states and 110 transitions. [2024-06-04 14:55:16,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 303 transitions, 4035 flow [2024-06-04 14:55:17,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 303 transitions, 3893 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-04 14:55:17,404 INFO L231 Difference]: Finished difference. Result has 250 places, 289 transitions, 3222 flow [2024-06-04 14:55:17,404 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} [2024-06-04 14:55:17,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-04 14:55:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 289 transitions, 3222 flow [2024-06-04 14:55:17,405 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) [2024-06-04 14:55:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:17,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:55:17,405 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)] === [2024-06-04 14:55:17,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1649014992, now seen corresponding path program 5 times [2024-06-04 14:55:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742165870] [2024-06-04 14:55:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:18,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742165870] [2024-06-04 14:55:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742165870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:18,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:18,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:55:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375854940] [2024-06-04 14:55:18,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:55:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:55:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:55:18,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:18,077 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) [2024-06-04 14:55:18,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:18,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:18,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:19,089 INFO L124 PetriNetUnfolderBase]: 3586/5554 cut-off events. [2024-06-04 14:55:19,090 INFO L125 PetriNetUnfolderBase]: For 508855/508867 co-relation queries the response was YES. [2024-06-04 14:55:19,124 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. [2024-06-04 14:55:19,142 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 19 changer transitions 0/299 dead transitions. [2024-06-04 14:55:19,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 299 transitions, 3843 flow [2024-06-04 14:55:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:55:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:55:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-04 14:55:19,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-04 14:55:19,143 INFO L175 Difference]: Start difference. First operand has 250 places, 289 transitions, 3222 flow. Second operand 7 states and 103 transitions. [2024-06-04 14:55:19,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 299 transitions, 3843 flow [2024-06-04 14:55:19,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 299 transitions, 3751 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:55:19,679 INFO L231 Difference]: Finished difference. Result has 253 places, 289 transitions, 3174 flow [2024-06-04 14:55:19,679 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} [2024-06-04 14:55:19,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-04 14:55:19,680 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 289 transitions, 3174 flow [2024-06-04 14:55:19,680 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) [2024-06-04 14:55:19,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:19,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:19,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:55:19,681 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)] === [2024-06-04 14:55:19,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:19,681 INFO L85 PathProgramCache]: Analyzing trace with hash -238112348, now seen corresponding path program 6 times [2024-06-04 14:55:19,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:19,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364243678] [2024-06-04 14:55:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:19,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364243678] [2024-06-04 14:55:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364243678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:20,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:20,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:55:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549882220] [2024-06-04 14:55:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:20,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:55:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:20,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:55:20,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:55:20,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:20,501 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) [2024-06-04 14:55:20,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:20,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:20,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:21,445 INFO L124 PetriNetUnfolderBase]: 3583/5550 cut-off events. [2024-06-04 14:55:21,445 INFO L125 PetriNetUnfolderBase]: For 520971/520983 co-relation queries the response was YES. [2024-06-04 14:55:21,488 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. [2024-06-04 14:55:21,510 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 27 changer transitions 0/299 dead transitions. [2024-06-04 14:55:21,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 299 transitions, 3795 flow [2024-06-04 14:55:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:55:21,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:55:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-04 14:55:21,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-04 14:55:21,518 INFO L175 Difference]: Start difference. First operand has 253 places, 289 transitions, 3174 flow. Second operand 7 states and 104 transitions. [2024-06-04 14:55:21,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 299 transitions, 3795 flow [2024-06-04 14:55:22,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 299 transitions, 3725 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:22,213 INFO L231 Difference]: Finished difference. Result has 254 places, 289 transitions, 3164 flow [2024-06-04 14:55:22,213 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} [2024-06-04 14:55:22,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-04 14:55:22,214 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 289 transitions, 3164 flow [2024-06-04 14:55:22,214 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) [2024-06-04 14:55:22,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:22,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:22,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:55:22,214 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)] === [2024-06-04 14:55:22,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:22,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2004846021, now seen corresponding path program 6 times [2024-06-04 14:55:22,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:22,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020421550] [2024-06-04 14:55:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:22,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:23,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:23,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020421550] [2024-06-04 14:55:23,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020421550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:23,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:23,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:23,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675966908] [2024-06-04 14:55:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:23,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:23,555 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) [2024-06-04 14:55:23,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:23,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:23,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:24,693 INFO L124 PetriNetUnfolderBase]: 3471/5426 cut-off events. [2024-06-04 14:55:24,693 INFO L125 PetriNetUnfolderBase]: For 536290/536304 co-relation queries the response was YES. [2024-06-04 14:55:24,736 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. [2024-06-04 14:55:24,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 62 changer transitions 0/322 dead transitions. [2024-06-04 14:55:24,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 322 transitions, 3856 flow [2024-06-04 14:55:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:55:24,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-04 14:55:24,768 INFO L175 Difference]: Start difference. First operand has 254 places, 289 transitions, 3164 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:55:24,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 322 transitions, 3856 flow [2024-06-04 14:55:25,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 322 transitions, 3748 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:25,456 INFO L231 Difference]: Finished difference. Result has 257 places, 289 transitions, 3186 flow [2024-06-04 14:55:25,457 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} [2024-06-04 14:55:25,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-04 14:55:25,457 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 289 transitions, 3186 flow [2024-06-04 14:55:25,457 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) [2024-06-04 14:55:25,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:25,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:25,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:55:25,458 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)] === [2024-06-04 14:55:25,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:25,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1864470537, now seen corresponding path program 7 times [2024-06-04 14:55:25,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:25,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229199855] [2024-06-04 14:55:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:26,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:26,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229199855] [2024-06-04 14:55:26,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229199855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:26,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:26,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229150067] [2024-06-04 14:55:26,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:26,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:26,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:26,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:26,874 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) [2024-06-04 14:55:26,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:26,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:26,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:27,990 INFO L124 PetriNetUnfolderBase]: 3449/5390 cut-off events. [2024-06-04 14:55:27,990 INFO L125 PetriNetUnfolderBase]: For 532466/532482 co-relation queries the response was YES. [2024-06-04 14:55:28,030 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. [2024-06-04 14:55:28,052 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 61 changer transitions 0/322 dead transitions. [2024-06-04 14:55:28,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 322 transitions, 3878 flow [2024-06-04 14:55:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-04 14:55:28,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-04 14:55:28,056 INFO L175 Difference]: Start difference. First operand has 257 places, 289 transitions, 3186 flow. Second operand 9 states and 160 transitions. [2024-06-04 14:55:28,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 322 transitions, 3878 flow [2024-06-04 14:55:28,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 322 transitions, 3707 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:28,666 INFO L231 Difference]: Finished difference. Result has 259 places, 289 transitions, 3144 flow [2024-06-04 14:55:28,667 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} [2024-06-04 14:55:28,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-04 14:55:28,667 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 289 transitions, 3144 flow [2024-06-04 14:55:28,667 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) [2024-06-04 14:55:28,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:28,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:28,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:55:28,668 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)] === [2024-06-04 14:55:28,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1597845403, now seen corresponding path program 8 times [2024-06-04 14:55:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662702963] [2024-06-04 14:55:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:28,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662702963] [2024-06-04 14:55:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662702963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928492235] [2024-06-04 14:55:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:30,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:30,258 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) [2024-06-04 14:55:30,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:30,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:30,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:31,352 INFO L124 PetriNetUnfolderBase]: 3429/5358 cut-off events. [2024-06-04 14:55:31,352 INFO L125 PetriNetUnfolderBase]: For 526516/526532 co-relation queries the response was YES. [2024-06-04 14:55:31,393 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. [2024-06-04 14:55:31,414 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 97 changer transitions 0/332 dead transitions. [2024-06-04 14:55:31,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 332 transitions, 3838 flow [2024-06-04 14:55:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-04 14:55:31,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-04 14:55:31,416 INFO L175 Difference]: Start difference. First operand has 259 places, 289 transitions, 3144 flow. Second operand 10 states and 182 transitions. [2024-06-04 14:55:31,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 332 transitions, 3838 flow [2024-06-04 14:55:31,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 332 transitions, 3698 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:31,968 INFO L231 Difference]: Finished difference. Result has 262 places, 290 transitions, 3168 flow [2024-06-04 14:55:31,968 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} [2024-06-04 14:55:31,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 14:55:31,969 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 290 transitions, 3168 flow [2024-06-04 14:55:31,969 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) [2024-06-04 14:55:31,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:31,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:31,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:55:31,969 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)] === [2024-06-04 14:55:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:31,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1335209069, now seen corresponding path program 4 times [2024-06-04 14:55:31,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:31,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480947325] [2024-06-04 14:55:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:31,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:32,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480947325] [2024-06-04 14:55:32,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480947325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:32,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:32,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:32,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272900943] [2024-06-04 14:55:32,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:32,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:32,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:32,825 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) [2024-06-04 14:55:32,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:32,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:32,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:33,976 INFO L124 PetriNetUnfolderBase]: 3533/5470 cut-off events. [2024-06-04 14:55:33,976 INFO L125 PetriNetUnfolderBase]: For 525245/525254 co-relation queries the response was YES. [2024-06-04 14:55:34,019 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. [2024-06-04 14:55:34,040 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 254 selfloop transitions, 50 changer transitions 0/307 dead transitions. [2024-06-04 14:55:34,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 307 transitions, 3989 flow [2024-06-04 14:55:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 14:55:34,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-04 14:55:34,042 INFO L175 Difference]: Start difference. First operand has 262 places, 290 transitions, 3168 flow. Second operand 8 states and 123 transitions. [2024-06-04 14:55:34,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 307 transitions, 3989 flow [2024-06-04 14:55:34,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 307 transitions, 3682 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:34,681 INFO L231 Difference]: Finished difference. Result has 263 places, 293 transitions, 3004 flow [2024-06-04 14:55:34,681 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} [2024-06-04 14:55:34,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-04 14:55:34,682 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 293 transitions, 3004 flow [2024-06-04 14:55:34,682 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) [2024-06-04 14:55:34,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:34,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:34,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:55:34,682 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)] === [2024-06-04 14:55:34,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:34,683 INFO L85 PathProgramCache]: Analyzing trace with hash 504453581, now seen corresponding path program 5 times [2024-06-04 14:55:34,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:34,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214244732] [2024-06-04 14:55:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:34,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214244732] [2024-06-04 14:55:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214244732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:35,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:35,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:35,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599572345] [2024-06-04 14:55:35,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:35,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:35,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:35,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:35,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:35,514 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) [2024-06-04 14:55:35,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:35,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:35,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:36,622 INFO L124 PetriNetUnfolderBase]: 3543/5484 cut-off events. [2024-06-04 14:55:36,623 INFO L125 PetriNetUnfolderBase]: For 535363/535372 co-relation queries the response was YES. [2024-06-04 14:55:36,667 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. [2024-06-04 14:55:36,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 52 changer transitions 0/311 dead transitions. [2024-06-04 14:55:36,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 311 transitions, 3845 flow [2024-06-04 14:55:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:55:36,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:55:36,688 INFO L175 Difference]: Start difference. First operand has 263 places, 293 transitions, 3004 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:55:36,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 311 transitions, 3845 flow [2024-06-04 14:55:37,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 311 transitions, 3670 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:37,315 INFO L231 Difference]: Finished difference. Result has 264 places, 296 transitions, 2982 flow [2024-06-04 14:55:37,315 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} [2024-06-04 14:55:37,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-04 14:55:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 296 transitions, 2982 flow [2024-06-04 14:55:37,316 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) [2024-06-04 14:55:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:37,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:37,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:55:37,316 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)] === [2024-06-04 14:55:37,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1335197506, now seen corresponding path program 2 times [2024-06-04 14:55:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:37,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553624130] [2024-06-04 14:55:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553624130] [2024-06-04 14:55:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553624130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:38,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:38,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36055087] [2024-06-04 14:55:38,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:38,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:38,113 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) [2024-06-04 14:55:38,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:38,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:38,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:39,295 INFO L124 PetriNetUnfolderBase]: 3553/5496 cut-off events. [2024-06-04 14:55:39,296 INFO L125 PetriNetUnfolderBase]: For 549292/549304 co-relation queries the response was YES. [2024-06-04 14:55:39,332 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. [2024-06-04 14:55:39,349 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 37 changer transitions 0/314 dead transitions. [2024-06-04 14:55:39,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 314 transitions, 3843 flow [2024-06-04 14:55:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:55:39,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-04 14:55:39,350 INFO L175 Difference]: Start difference. First operand has 264 places, 296 transitions, 2982 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:55:39,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 314 transitions, 3843 flow [2024-06-04 14:55:40,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 314 transitions, 3735 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:40,020 INFO L231 Difference]: Finished difference. Result has 267 places, 299 transitions, 3006 flow [2024-06-04 14:55:40,021 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} [2024-06-04 14:55:40,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-04 14:55:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 299 transitions, 3006 flow [2024-06-04 14:55:40,021 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) [2024-06-04 14:55:40,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:40,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:55:40,022 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)] === [2024-06-04 14:55:40,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash 517786464, now seen corresponding path program 3 times [2024-06-04 14:55:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243309461] [2024-06-04 14:55:40,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:40,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:40,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243309461] [2024-06-04 14:55:40,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243309461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:40,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:40,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753864985] [2024-06-04 14:55:40,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:40,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:40,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:40,837 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) [2024-06-04 14:55:40,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:40,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:40,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:41,957 INFO L124 PetriNetUnfolderBase]: 3563/5508 cut-off events. [2024-06-04 14:55:41,957 INFO L125 PetriNetUnfolderBase]: For 564027/564027 co-relation queries the response was YES. [2024-06-04 14:55:41,999 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. [2024-06-04 14:55:42,019 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 290 selfloop transitions, 20 changer transitions 0/313 dead transitions. [2024-06-04 14:55:42,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 313 transitions, 3712 flow [2024-06-04 14:55:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:42,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-04 14:55:42,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-04 14:55:42,021 INFO L175 Difference]: Start difference. First operand has 267 places, 299 transitions, 3006 flow. Second operand 8 states and 113 transitions. [2024-06-04 14:55:42,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 313 transitions, 3712 flow [2024-06-04 14:55:42,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 313 transitions, 3583 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:42,796 INFO L231 Difference]: Finished difference. Result has 269 places, 302 transitions, 2988 flow [2024-06-04 14:55:42,796 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} [2024-06-04 14:55:42,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-04 14:55:42,797 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 302 transitions, 2988 flow [2024-06-04 14:55:42,797 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) [2024-06-04 14:55:42,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:42,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:42,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:55:42,797 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)] === [2024-06-04 14:55:42,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash 517340994, now seen corresponding path program 4 times [2024-06-04 14:55:42,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:42,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282793328] [2024-06-04 14:55:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:42,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:43,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:43,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282793328] [2024-06-04 14:55:43,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282793328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:43,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:43,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021903223] [2024-06-04 14:55:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:43,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:43,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:43,638 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) [2024-06-04 14:55:43,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:43,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:43,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:44,790 INFO L124 PetriNetUnfolderBase]: 3557/5501 cut-off events. [2024-06-04 14:55:44,791 INFO L125 PetriNetUnfolderBase]: For 572918/572924 co-relation queries the response was YES. [2024-06-04 14:55:44,832 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. [2024-06-04 14:55:44,852 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 41 changer transitions 0/316 dead transitions. [2024-06-04 14:55:44,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 316 transitions, 3657 flow [2024-06-04 14:55:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 14:55:44,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-04 14:55:44,854 INFO L175 Difference]: Start difference. First operand has 269 places, 302 transitions, 2988 flow. Second operand 8 states and 119 transitions. [2024-06-04 14:55:44,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 316 transitions, 3657 flow [2024-06-04 14:55:45,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 316 transitions, 3516 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:45,596 INFO L231 Difference]: Finished difference. Result has 268 places, 302 transitions, 2935 flow [2024-06-04 14:55:45,596 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} [2024-06-04 14:55:45,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-04 14:55:45,596 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 302 transitions, 2935 flow [2024-06-04 14:55:45,596 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) [2024-06-04 14:55:45,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:45,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:45,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:55:45,597 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)] === [2024-06-04 14:55:45,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:45,597 INFO L85 PathProgramCache]: Analyzing trace with hash 517340591, now seen corresponding path program 6 times [2024-06-04 14:55:45,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:45,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925013796] [2024-06-04 14:55:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:45,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:46,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925013796] [2024-06-04 14:55:46,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925013796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:46,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044139718] [2024-06-04 14:55:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:46,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:46,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:55:46,458 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) [2024-06-04 14:55:46,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:46,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:55:46,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:47,598 INFO L124 PetriNetUnfolderBase]: 3551/5495 cut-off events. [2024-06-04 14:55:47,599 INFO L125 PetriNetUnfolderBase]: For 581625/581628 co-relation queries the response was YES. [2024-06-04 14:55:47,642 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. [2024-06-04 14:55:47,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 55 changer transitions 0/315 dead transitions. [2024-06-04 14:55:47,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 315 transitions, 3595 flow [2024-06-04 14:55:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:55:47,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-04 14:55:47,664 INFO L175 Difference]: Start difference. First operand has 268 places, 302 transitions, 2935 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:55:47,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 315 transitions, 3595 flow [2024-06-04 14:55:48,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 315 transitions, 3466 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:48,285 INFO L231 Difference]: Finished difference. Result has 269 places, 302 transitions, 2922 flow [2024-06-04 14:55:48,285 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} [2024-06-04 14:55:48,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-04 14:55:48,286 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 302 transitions, 2922 flow [2024-06-04 14:55:48,286 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) [2024-06-04 14:55:48,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:48,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:48,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:55:48,286 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)] === [2024-06-04 14:55:48,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -382142812, now seen corresponding path program 1 times [2024-06-04 14:55:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:48,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47633896] [2024-06-04 14:55:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:49,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47633896] [2024-06-04 14:55:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47633896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:49,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:49,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:49,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959655078] [2024-06-04 14:55:49,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:49,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:49,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:49,411 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) [2024-06-04 14:55:49,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:49,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:49,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:50,396 INFO L124 PetriNetUnfolderBase]: 3393/5330 cut-off events. [2024-06-04 14:55:50,396 INFO L125 PetriNetUnfolderBase]: For 506709/506713 co-relation queries the response was YES. [2024-06-04 14:55:50,436 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. [2024-06-04 14:55:50,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 24 changer transitions 0/329 dead transitions. [2024-06-04 14:55:50,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 329 transitions, 3846 flow [2024-06-04 14:55:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 14:55:50,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-04 14:55:50,456 INFO L175 Difference]: Start difference. First operand has 269 places, 302 transitions, 2922 flow. Second operand 9 states and 141 transitions. [2024-06-04 14:55:50,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 329 transitions, 3846 flow [2024-06-04 14:55:51,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 329 transitions, 3682 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:51,199 INFO L231 Difference]: Finished difference. Result has 269 places, 308 transitions, 2910 flow [2024-06-04 14:55:51,200 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} [2024-06-04 14:55:51,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-04 14:55:51,200 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 308 transitions, 2910 flow [2024-06-04 14:55:51,200 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) [2024-06-04 14:55:51,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:51,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:51,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:55:51,201 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)] === [2024-06-04 14:55:51,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash -385713857, now seen corresponding path program 1 times [2024-06-04 14:55:51,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:51,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52943644] [2024-06-04 14:55:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:52,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52943644] [2024-06-04 14:55:52,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52943644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:52,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:52,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783820034] [2024-06-04 14:55:52,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:52,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:52,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:52,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:52,161 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) [2024-06-04 14:55:52,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:52,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:52,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:53,199 INFO L124 PetriNetUnfolderBase]: 3408/5351 cut-off events. [2024-06-04 14:55:53,199 INFO L125 PetriNetUnfolderBase]: For 522022/522026 co-relation queries the response was YES. [2024-06-04 14:55:53,237 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. [2024-06-04 14:55:53,255 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 18 changer transitions 0/328 dead transitions. [2024-06-04 14:55:53,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 328 transitions, 3642 flow [2024-06-04 14:55:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:55:53,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:55:53,256 INFO L175 Difference]: Start difference. First operand has 269 places, 308 transitions, 2910 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:55:53,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 328 transitions, 3642 flow [2024-06-04 14:55:53,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 328 transitions, 3569 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:55:53,907 INFO L231 Difference]: Finished difference. Result has 272 places, 311 transitions, 2945 flow [2024-06-04 14:55:53,908 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} [2024-06-04 14:55:53,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-04 14:55:53,908 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 311 transitions, 2945 flow [2024-06-04 14:55:53,908 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) [2024-06-04 14:55:53,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:53,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:55:53,909 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)] === [2024-06-04 14:55:53,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash -686086070, now seen corresponding path program 2 times [2024-06-04 14:55:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:53,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104254333] [2024-06-04 14:55:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:53,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:54,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104254333] [2024-06-04 14:55:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104254333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:54,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:54,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11873897] [2024-06-04 14:55:54,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:54,930 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) [2024-06-04 14:55:54,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:54,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:54,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:55,938 INFO L124 PetriNetUnfolderBase]: 3405/5347 cut-off events. [2024-06-04 14:55:55,939 INFO L125 PetriNetUnfolderBase]: For 528062/528066 co-relation queries the response was YES. [2024-06-04 14:55:55,977 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. [2024-06-04 14:55:55,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 18 changer transitions 0/327 dead transitions. [2024-06-04 14:55:55,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 327 transitions, 3611 flow [2024-06-04 14:55:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:55,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:55:55,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:55:55,996 INFO L175 Difference]: Start difference. First operand has 272 places, 311 transitions, 2945 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:55:55,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 327 transitions, 3611 flow [2024-06-04 14:55:56,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 327 transitions, 3509 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:56,705 INFO L231 Difference]: Finished difference. Result has 274 places, 311 transitions, 2885 flow [2024-06-04 14:55:56,705 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} [2024-06-04 14:55:56,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-04 14:55:56,706 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 311 transitions, 2885 flow [2024-06-04 14:55:56,706 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) [2024-06-04 14:55:56,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:56,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:56,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:55:56,706 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)] === [2024-06-04 14:55:56,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:56,707 INFO L85 PathProgramCache]: Analyzing trace with hash -381994942, now seen corresponding path program 3 times [2024-06-04 14:55:56,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:56,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104704522] [2024-06-04 14:55:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:56,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:57,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:57,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104704522] [2024-06-04 14:55:57,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104704522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:57,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:57,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:55:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035834434] [2024-06-04 14:55:57,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:57,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:55:57,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:57,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:55:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:55:57,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:55:57,729 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) [2024-06-04 14:55:57,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:57,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:55:57,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:58,717 INFO L124 PetriNetUnfolderBase]: 3410/5354 cut-off events. [2024-06-04 14:55:58,717 INFO L125 PetriNetUnfolderBase]: For 540757/540761 co-relation queries the response was YES. [2024-06-04 14:55:58,752 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. [2024-06-04 14:55:58,767 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 30 changer transitions 0/327 dead transitions. [2024-06-04 14:55:58,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 327 transitions, 3595 flow [2024-06-04 14:55:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:55:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:55:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-04 14:55:58,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-04 14:55:58,769 INFO L175 Difference]: Start difference. First operand has 274 places, 311 transitions, 2885 flow. Second operand 8 states and 125 transitions. [2024-06-04 14:55:58,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 327 transitions, 3595 flow [2024-06-04 14:55:59,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 327 transitions, 3549 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:59,551 INFO L231 Difference]: Finished difference. Result has 275 places, 314 transitions, 2963 flow [2024-06-04 14:55:59,552 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} [2024-06-04 14:55:59,552 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 14:55:59,552 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 314 transitions, 2963 flow [2024-06-04 14:55:59,552 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) [2024-06-04 14:55:59,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:59,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:59,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:55:59,553 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)] === [2024-06-04 14:55:59,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -685941765, now seen corresponding path program 2 times [2024-06-04 14:55:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896973370] [2024-06-04 14:55:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:59,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:00,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896973370] [2024-06-04 14:56:00,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896973370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:00,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:00,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:00,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452709644] [2024-06-04 14:56:00,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:00,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:00,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:00,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:00,400 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) [2024-06-04 14:56:00,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:00,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:00,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:01,333 INFO L124 PetriNetUnfolderBase]: 3464/5431 cut-off events. [2024-06-04 14:56:01,333 INFO L125 PetriNetUnfolderBase]: For 571616/571620 co-relation queries the response was YES. [2024-06-04 14:56:01,376 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. [2024-06-04 14:56:01,396 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 46 changer transitions 0/342 dead transitions. [2024-06-04 14:56:01,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 342 transitions, 4191 flow [2024-06-04 14:56:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:56:01,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 14:56:01,397 INFO L175 Difference]: Start difference. First operand has 275 places, 314 transitions, 2963 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:56:01,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 342 transitions, 4191 flow [2024-06-04 14:56:02,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 342 transitions, 4089 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:02,384 INFO L231 Difference]: Finished difference. Result has 277 places, 323 transitions, 3169 flow [2024-06-04 14:56:02,385 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} [2024-06-04 14:56:02,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-04 14:56:02,385 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 323 transitions, 3169 flow [2024-06-04 14:56:02,385 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) [2024-06-04 14:56:02,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:02,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:56:02,386 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)] === [2024-06-04 14:56:02,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:02,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1528779641, now seen corresponding path program 3 times [2024-06-04 14:56:02,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:02,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386360429] [2024-06-04 14:56:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:02,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:03,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386360429] [2024-06-04 14:56:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386360429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:03,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:03,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:03,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495541514] [2024-06-04 14:56:03,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:03,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:03,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:03,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:03,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:03,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:03,286 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) [2024-06-04 14:56:03,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:03,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:03,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:04,208 INFO L124 PetriNetUnfolderBase]: 3433/5388 cut-off events. [2024-06-04 14:56:04,208 INFO L125 PetriNetUnfolderBase]: For 576737/576741 co-relation queries the response was YES. [2024-06-04 14:56:04,249 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. [2024-06-04 14:56:04,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 47 changer transitions 0/340 dead transitions. [2024-06-04 14:56:04,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 340 transitions, 4027 flow [2024-06-04 14:56:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:04,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:04,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:56:04,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:56:04,270 INFO L175 Difference]: Start difference. First operand has 277 places, 323 transitions, 3169 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:56:04,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 340 transitions, 4027 flow [2024-06-04 14:56:05,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 340 transitions, 3880 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-04 14:56:05,136 INFO L231 Difference]: Finished difference. Result has 282 places, 323 transitions, 3122 flow [2024-06-04 14:56:05,137 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} [2024-06-04 14:56:05,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-04 14:56:05,137 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 323 transitions, 3122 flow [2024-06-04 14:56:05,138 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) [2024-06-04 14:56:05,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:05,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:05,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:56:05,138 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)] === [2024-06-04 14:56:05,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:05,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1444462893, now seen corresponding path program 4 times [2024-06-04 14:56:05,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412076958] [2024-06-04 14:56:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:05,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:06,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:06,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412076958] [2024-06-04 14:56:06,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412076958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:06,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:06,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:06,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193053895] [2024-06-04 14:56:06,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:06,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:06,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:06,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:06,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:06,102 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) [2024-06-04 14:56:06,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:06,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:06,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:07,056 INFO L124 PetriNetUnfolderBase]: 3481/5458 cut-off events. [2024-06-04 14:56:07,056 INFO L125 PetriNetUnfolderBase]: For 601946/601950 co-relation queries the response was YES. [2024-06-04 14:56:07,100 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. [2024-06-04 14:56:07,120 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 297 selfloop transitions, 33 changer transitions 0/344 dead transitions. [2024-06-04 14:56:07,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 344 transitions, 4302 flow [2024-06-04 14:56:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-04 14:56:07,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-04 14:56:07,122 INFO L175 Difference]: Start difference. First operand has 282 places, 323 transitions, 3122 flow. Second operand 9 states and 136 transitions. [2024-06-04 14:56:07,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 344 transitions, 4302 flow [2024-06-04 14:56:07,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 344 transitions, 4188 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:08,002 INFO L231 Difference]: Finished difference. Result has 284 places, 329 transitions, 3236 flow [2024-06-04 14:56:08,002 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} [2024-06-04 14:56:08,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-04 14:56:08,003 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 329 transitions, 3236 flow [2024-06-04 14:56:08,003 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) [2024-06-04 14:56:08,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:08,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:08,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:56:08,004 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)] === [2024-06-04 14:56:08,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:08,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1329483586, now seen corresponding path program 4 times [2024-06-04 14:56:08,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:08,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70938705] [2024-06-04 14:56:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:08,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:08,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:08,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70938705] [2024-06-04 14:56:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70938705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:08,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:08,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:08,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764586803] [2024-06-04 14:56:08,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:08,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:08,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:08,938 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) [2024-06-04 14:56:08,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:08,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:08,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:09,921 INFO L124 PetriNetUnfolderBase]: 3456/5422 cut-off events. [2024-06-04 14:56:09,922 INFO L125 PetriNetUnfolderBase]: For 604659/604663 co-relation queries the response was YES. [2024-06-04 14:56:09,965 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. [2024-06-04 14:56:09,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 18 changer transitions 0/342 dead transitions. [2024-06-04 14:56:09,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 342 transitions, 3976 flow [2024-06-04 14:56:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-04 14:56:09,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-04 14:56:09,987 INFO L175 Difference]: Start difference. First operand has 284 places, 329 transitions, 3236 flow. Second operand 8 states and 118 transitions. [2024-06-04 14:56:09,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 342 transitions, 3976 flow [2024-06-04 14:56:11,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 342 transitions, 3840 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:11,064 INFO L231 Difference]: Finished difference. Result has 286 places, 332 transitions, 3208 flow [2024-06-04 14:56:11,064 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} [2024-06-04 14:56:11,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 14:56:11,065 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 332 transitions, 3208 flow [2024-06-04 14:56:11,065 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) [2024-06-04 14:56:11,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:11,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:11,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:56:11,065 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)] === [2024-06-04 14:56:11,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 517525289, now seen corresponding path program 5 times [2024-06-04 14:56:11,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:11,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633013663] [2024-06-04 14:56:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:11,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:11,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633013663] [2024-06-04 14:56:11,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633013663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:11,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:11,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142830964] [2024-06-04 14:56:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:11,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:11,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:11,942 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) [2024-06-04 14:56:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:11,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:12,965 INFO L124 PetriNetUnfolderBase]: 3458/5424 cut-off events. [2024-06-04 14:56:12,965 INFO L125 PetriNetUnfolderBase]: For 617396/617400 co-relation queries the response was YES. [2024-06-04 14:56:13,007 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. [2024-06-04 14:56:13,026 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 20 changer transitions 0/344 dead transitions. [2024-06-04 14:56:13,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 344 transitions, 3900 flow [2024-06-04 14:56:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-04 14:56:13,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-04 14:56:13,027 INFO L175 Difference]: Start difference. First operand has 286 places, 332 transitions, 3208 flow. Second operand 8 states and 120 transitions. [2024-06-04 14:56:13,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 344 transitions, 3900 flow [2024-06-04 14:56:14,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 344 transitions, 3766 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:14,088 INFO L231 Difference]: Finished difference. Result has 288 places, 332 transitions, 3120 flow [2024-06-04 14:56:14,089 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} [2024-06-04 14:56:14,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 14:56:14,089 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 332 transitions, 3120 flow [2024-06-04 14:56:14,089 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) [2024-06-04 14:56:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:56:14,090 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)] === [2024-06-04 14:56:14,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash 510168059, now seen corresponding path program 6 times [2024-06-04 14:56:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:14,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657436709] [2024-06-04 14:56:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:14,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657436709] [2024-06-04 14:56:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657436709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:14,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:14,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596092191] [2024-06-04 14:56:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:14,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:14,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 14:56:14,998 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) [2024-06-04 14:56:14,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:14,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 14:56:14,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:16,115 INFO L124 PetriNetUnfolderBase]: 3452/5416 cut-off events. [2024-06-04 14:56:16,115 INFO L125 PetriNetUnfolderBase]: For 617402/617406 co-relation queries the response was YES. [2024-06-04 14:56:16,155 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. [2024-06-04 14:56:16,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 298 selfloop transitions, 33 changer transitions 0/345 dead transitions. [2024-06-04 14:56:16,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 345 transitions, 3818 flow [2024-06-04 14:56:16,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:56:16,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:56:16,172 INFO L175 Difference]: Start difference. First operand has 288 places, 332 transitions, 3120 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:56:16,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 345 transitions, 3818 flow [2024-06-04 14:56:17,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 345 transitions, 3711 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:17,295 INFO L231 Difference]: Finished difference. Result has 289 places, 332 transitions, 3085 flow [2024-06-04 14:56:17,295 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} [2024-06-04 14:56:17,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-04 14:56:17,295 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 332 transitions, 3085 flow [2024-06-04 14:56:17,295 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) [2024-06-04 14:56:17,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:17,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:17,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:56:17,296 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)] === [2024-06-04 14:56:17,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 517802336, now seen corresponding path program 1 times [2024-06-04 14:56:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:17,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614670511] [2024-06-04 14:56:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:17,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:18,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:18,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614670511] [2024-06-04 14:56:18,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614670511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:18,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:18,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290161708] [2024-06-04 14:56:18,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:18,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:18,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:18,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:18,291 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) [2024-06-04 14:56:18,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:18,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:18,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:19,436 INFO L124 PetriNetUnfolderBase]: 3632/5606 cut-off events. [2024-06-04 14:56:19,436 INFO L125 PetriNetUnfolderBase]: For 736702/736702 co-relation queries the response was YES. [2024-06-04 14:56:19,477 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. [2024-06-04 14:56:19,495 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 323 selfloop transitions, 19 changer transitions 0/345 dead transitions. [2024-06-04 14:56:19,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 345 transitions, 3851 flow [2024-06-04 14:56:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-04 14:56:19,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-04 14:56:19,496 INFO L175 Difference]: Start difference. First operand has 289 places, 332 transitions, 3085 flow. Second operand 8 states and 112 transitions. [2024-06-04 14:56:19,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 345 transitions, 3851 flow [2024-06-04 14:56:20,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 345 transitions, 3777 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:20,498 INFO L231 Difference]: Finished difference. Result has 290 places, 334 transitions, 3114 flow [2024-06-04 14:56:20,498 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} [2024-06-04 14:56:20,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-04 14:56:20,499 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 334 transitions, 3114 flow [2024-06-04 14:56:20,499 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) [2024-06-04 14:56:20,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:20,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:20,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:56:20,499 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)] === [2024-06-04 14:56:20,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1199605016, now seen corresponding path program 1 times [2024-06-04 14:56:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780971890] [2024-06-04 14:56:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:21,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:21,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780971890] [2024-06-04 14:56:21,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780971890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:21,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241063708] [2024-06-04 14:56:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:21,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:21,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:21,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:21,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:21,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:21,262 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) [2024-06-04 14:56:21,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:21,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:21,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:22,377 INFO L124 PetriNetUnfolderBase]: 3658/5642 cut-off events. [2024-06-04 14:56:22,377 INFO L125 PetriNetUnfolderBase]: For 760567/760567 co-relation queries the response was YES. [2024-06-04 14:56:22,424 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. [2024-06-04 14:56:22,443 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 46 changer transitions 0/375 dead transitions. [2024-06-04 14:56:22,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 375 transitions, 4264 flow [2024-06-04 14:56:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:56:22,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 14:56:22,445 INFO L175 Difference]: Start difference. First operand has 290 places, 334 transitions, 3114 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:56:22,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 375 transitions, 4264 flow [2024-06-04 14:56:23,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 375 transitions, 4177 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:23,680 INFO L231 Difference]: Finished difference. Result has 294 places, 348 transitions, 3314 flow [2024-06-04 14:56:23,680 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} [2024-06-04 14:56:23,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 14:56:23,681 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 348 transitions, 3314 flow [2024-06-04 14:56:23,681 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) [2024-06-04 14:56:23,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:23,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:23,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:56:23,681 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)] === [2024-06-04 14:56:23,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:23,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1359547872, now seen corresponding path program 2 times [2024-06-04 14:56:23,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:23,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566995658] [2024-06-04 14:56:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:23,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:24,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:24,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566995658] [2024-06-04 14:56:24,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566995658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:24,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:24,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:24,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288579572] [2024-06-04 14:56:24,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:24,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:24,454 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) [2024-06-04 14:56:24,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:24,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:24,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:25,575 INFO L124 PetriNetUnfolderBase]: 3668/5656 cut-off events. [2024-06-04 14:56:25,576 INFO L125 PetriNetUnfolderBase]: For 780690/780690 co-relation queries the response was YES. [2024-06-04 14:56:25,626 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. [2024-06-04 14:56:25,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 42 changer transitions 0/374 dead transitions. [2024-06-04 14:56:25,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 374 transitions, 4189 flow [2024-06-04 14:56:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:56:25,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:56:25,647 INFO L175 Difference]: Start difference. First operand has 294 places, 348 transitions, 3314 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:56:25,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 374 transitions, 4189 flow [2024-06-04 14:56:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 374 transitions, 4070 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-04 14:56:26,870 INFO L231 Difference]: Finished difference. Result has 300 places, 352 transitions, 3361 flow [2024-06-04 14:56:26,870 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} [2024-06-04 14:56:26,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-04 14:56:26,871 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 352 transitions, 3361 flow [2024-06-04 14:56:26,871 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) [2024-06-04 14:56:26,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:26,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:56:26,871 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)] === [2024-06-04 14:56:26,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1312980116, now seen corresponding path program 1 times [2024-06-04 14:56:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507157029] [2024-06-04 14:56:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:26,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507157029] [2024-06-04 14:56:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507157029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:27,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979287381] [2024-06-04 14:56:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:27,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:28,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:28,073 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) [2024-06-04 14:56:28,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:28,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:28,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:29,311 INFO L124 PetriNetUnfolderBase]: 3676/5668 cut-off events. [2024-06-04 14:56:29,312 INFO L125 PetriNetUnfolderBase]: For 797345/797345 co-relation queries the response was YES. [2024-06-04 14:56:29,365 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. [2024-06-04 14:56:29,386 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 339 selfloop transitions, 41 changer transitions 0/383 dead transitions. [2024-06-04 14:56:29,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 383 transitions, 4470 flow [2024-06-04 14:56:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:56:29,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:56:29,387 INFO L175 Difference]: Start difference. First operand has 300 places, 352 transitions, 3361 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:56:29,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 383 transitions, 4470 flow [2024-06-04 14:56:30,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 383 transitions, 4374 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:30,561 INFO L231 Difference]: Finished difference. Result has 303 places, 356 transitions, 3456 flow [2024-06-04 14:56:30,562 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} [2024-06-04 14:56:30,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 14:56:30,563 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 356 transitions, 3456 flow [2024-06-04 14:56:30,564 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) [2024-06-04 14:56:30,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:30,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:30,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:56:30,564 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)] === [2024-06-04 14:56:30,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1189071842, now seen corresponding path program 2 times [2024-06-04 14:56:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:30,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17627082] [2024-06-04 14:56:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:31,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17627082] [2024-06-04 14:56:31,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17627082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:31,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170386130] [2024-06-04 14:56:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:31,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:31,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:31,626 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) [2024-06-04 14:56:31,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:31,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:31,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:32,904 INFO L124 PetriNetUnfolderBase]: 3684/5680 cut-off events. [2024-06-04 14:56:32,904 INFO L125 PetriNetUnfolderBase]: For 816630/816630 co-relation queries the response was YES. [2024-06-04 14:56:32,959 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. [2024-06-04 14:56:32,980 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 338 selfloop transitions, 39 changer transitions 0/380 dead transitions. [2024-06-04 14:56:32,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 380 transitions, 4325 flow [2024-06-04 14:56:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:56:32,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:56:32,982 INFO L175 Difference]: Start difference. First operand has 303 places, 356 transitions, 3456 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:56:32,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 380 transitions, 4325 flow [2024-06-04 14:56:34,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 380 transitions, 4189 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:34,111 INFO L231 Difference]: Finished difference. Result has 307 places, 358 transitions, 3461 flow [2024-06-04 14:56:34,112 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} [2024-06-04 14:56:34,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 14:56:34,112 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 358 transitions, 3461 flow [2024-06-04 14:56:34,112 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) [2024-06-04 14:56:34,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:34,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:56:34,113 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)] === [2024-06-04 14:56:34,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:34,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1321561908, now seen corresponding path program 1 times [2024-06-04 14:56:34,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:34,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566772263] [2024-06-04 14:56:34,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566772263] [2024-06-04 14:56:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566772263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:34,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:34,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145959158] [2024-06-04 14:56:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:34,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:35,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:35,062 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) [2024-06-04 14:56:35,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:35,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:35,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:36,447 INFO L124 PetriNetUnfolderBase]: 3704/5708 cut-off events. [2024-06-04 14:56:36,447 INFO L125 PetriNetUnfolderBase]: For 842813/842813 co-relation queries the response was YES. [2024-06-04 14:56:36,498 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. [2024-06-04 14:56:36,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 74 changer transitions 0/393 dead transitions. [2024-06-04 14:56:36,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 393 transitions, 4616 flow [2024-06-04 14:56:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-04 14:56:36,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-04 14:56:36,519 INFO L175 Difference]: Start difference. First operand has 307 places, 358 transitions, 3461 flow. Second operand 9 states and 152 transitions. [2024-06-04 14:56:36,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 393 transitions, 4616 flow [2024-06-04 14:56:37,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 393 transitions, 4519 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:37,752 INFO L231 Difference]: Finished difference. Result has 310 places, 364 transitions, 3632 flow [2024-06-04 14:56:37,752 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} [2024-06-04 14:56:37,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-04 14:56:37,753 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 364 transitions, 3632 flow [2024-06-04 14:56:37,753 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) [2024-06-04 14:56:37,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:37,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:56:37,753 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)] === [2024-06-04 14:56:37,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:37,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2115716732, now seen corresponding path program 1 times [2024-06-04 14:56:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:37,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633620166] [2024-06-04 14:56:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:38,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:38,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633620166] [2024-06-04 14:56:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633620166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:38,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:38,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871020193] [2024-06-04 14:56:38,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:38,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:38,655 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) [2024-06-04 14:56:38,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:38,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:38,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:39,965 INFO L124 PetriNetUnfolderBase]: 3709/5715 cut-off events. [2024-06-04 14:56:39,965 INFO L125 PetriNetUnfolderBase]: For 850654/850654 co-relation queries the response was YES. [2024-06-04 14:56:40,012 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. [2024-06-04 14:56:40,032 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 18 changer transitions 0/389 dead transitions. [2024-06-04 14:56:40,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 389 transitions, 4545 flow [2024-06-04 14:56:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 14:56:40,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-04 14:56:40,033 INFO L175 Difference]: Start difference. First operand has 310 places, 364 transitions, 3632 flow. Second operand 8 states and 123 transitions. [2024-06-04 14:56:40,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 389 transitions, 4545 flow [2024-06-04 14:56:41,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 389 transitions, 4428 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:41,274 INFO L231 Difference]: Finished difference. Result has 313 places, 367 transitions, 3643 flow [2024-06-04 14:56:41,275 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} [2024-06-04 14:56:41,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 14:56:41,275 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 367 transitions, 3643 flow [2024-06-04 14:56:41,275 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) [2024-06-04 14:56:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:41,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:41,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:56:41,276 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)] === [2024-06-04 14:56:41,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1431131222, now seen corresponding path program 3 times [2024-06-04 14:56:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120915307] [2024-06-04 14:56:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:42,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:42,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120915307] [2024-06-04 14:56:42,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120915307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:42,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:42,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:42,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368514481] [2024-06-04 14:56:42,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:42,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:42,115 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) [2024-06-04 14:56:42,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:42,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:42,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:43,274 INFO L124 PetriNetUnfolderBase]: 3743/5762 cut-off events. [2024-06-04 14:56:43,274 INFO L125 PetriNetUnfolderBase]: For 885726/885726 co-relation queries the response was YES. [2024-06-04 14:56:43,330 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. [2024-06-04 14:56:43,351 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 68 changer transitions 0/402 dead transitions. [2024-06-04 14:56:43,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 402 transitions, 5071 flow [2024-06-04 14:56:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:56:43,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-04 14:56:43,352 INFO L175 Difference]: Start difference. First operand has 313 places, 367 transitions, 3643 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:56:43,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 402 transitions, 5071 flow [2024-06-04 14:56:44,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 402 transitions, 4965 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:44,759 INFO L231 Difference]: Finished difference. Result has 315 places, 376 transitions, 3877 flow [2024-06-04 14:56:44,759 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} [2024-06-04 14:56:44,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 14:56:44,759 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 376 transitions, 3877 flow [2024-06-04 14:56:44,759 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) [2024-06-04 14:56:44,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:44,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:56:44,760 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)] === [2024-06-04 14:56:44,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash 915262338, now seen corresponding path program 2 times [2024-06-04 14:56:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:44,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909683008] [2024-06-04 14:56:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:45,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:45,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909683008] [2024-06-04 14:56:45,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909683008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:45,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:45,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:45,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188472498] [2024-06-04 14:56:45,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:45,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:45,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:45,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:45,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:45,664 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) [2024-06-04 14:56:45,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:45,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:45,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:46,813 INFO L124 PetriNetUnfolderBase]: 3756/5780 cut-off events. [2024-06-04 14:56:46,813 INFO L125 PetriNetUnfolderBase]: For 909098/909098 co-relation queries the response was YES. [2024-06-04 14:56:46,870 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. [2024-06-04 14:56:46,892 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 37 changer transitions 0/402 dead transitions. [2024-06-04 14:56:46,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 402 transitions, 5092 flow [2024-06-04 14:56:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 14:56:46,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-04 14:56:46,894 INFO L175 Difference]: Start difference. First operand has 315 places, 376 transitions, 3877 flow. Second operand 8 states and 126 transitions. [2024-06-04 14:56:46,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 402 transitions, 5092 flow [2024-06-04 14:56:48,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 402 transitions, 4912 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:48,214 INFO L231 Difference]: Finished difference. Result has 318 places, 382 transitions, 3959 flow [2024-06-04 14:56:48,215 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} [2024-06-04 14:56:48,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-04 14:56:48,215 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 382 transitions, 3959 flow [2024-06-04 14:56:48,217 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) [2024-06-04 14:56:48,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:48,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:48,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:56:48,217 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)] === [2024-06-04 14:56:48,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:48,217 INFO L85 PathProgramCache]: Analyzing trace with hash 915262152, now seen corresponding path program 4 times [2024-06-04 14:56:48,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:48,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499570992] [2024-06-04 14:56:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:48,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:49,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:49,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499570992] [2024-06-04 14:56:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499570992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:49,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309950354] [2024-06-04 14:56:49,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:49,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:49,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:49,133 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) [2024-06-04 14:56:49,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:49,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:49,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:50,334 INFO L124 PetriNetUnfolderBase]: 3774/5805 cut-off events. [2024-06-04 14:56:50,334 INFO L125 PetriNetUnfolderBase]: For 937702/937702 co-relation queries the response was YES. [2024-06-04 14:56:50,392 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. [2024-06-04 14:56:50,414 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 74 changer transitions 0/411 dead transitions. [2024-06-04 14:56:50,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 411 transitions, 5283 flow [2024-06-04 14:56:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-04 14:56:50,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-04 14:56:50,415 INFO L175 Difference]: Start difference. First operand has 318 places, 382 transitions, 3959 flow. Second operand 8 states and 132 transitions. [2024-06-04 14:56:50,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 411 transitions, 5283 flow [2024-06-04 14:56:52,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 411 transitions, 5149 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:52,200 INFO L231 Difference]: Finished difference. Result has 322 places, 388 transitions, 4049 flow [2024-06-04 14:56:52,201 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} [2024-06-04 14:56:52,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 14:56:52,201 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 388 transitions, 4049 flow [2024-06-04 14:56:52,201 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) [2024-06-04 14:56:52,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:52,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:52,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:56:52,202 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)] === [2024-06-04 14:56:52,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1431430124, now seen corresponding path program 1 times [2024-06-04 14:56:52,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:52,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175248030] [2024-06-04 14:56:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:53,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:53,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175248030] [2024-06-04 14:56:53,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175248030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:53,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:53,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480379339] [2024-06-04 14:56:53,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:53,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:53,096 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) [2024-06-04 14:56:53,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:53,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:53,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:54,318 INFO L124 PetriNetUnfolderBase]: 3787/5823 cut-off events. [2024-06-04 14:56:54,318 INFO L125 PetriNetUnfolderBase]: For 957082/957082 co-relation queries the response was YES. [2024-06-04 14:56:54,367 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. [2024-06-04 14:56:54,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 370 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-04 14:56:54,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 414 transitions, 5224 flow [2024-06-04 14:56:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:56:54,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:56:54,388 INFO L175 Difference]: Start difference. First operand has 322 places, 388 transitions, 4049 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:56:54,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 414 transitions, 5224 flow [2024-06-04 14:56:56,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 414 transitions, 5112 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:56,229 INFO L231 Difference]: Finished difference. Result has 326 places, 394 transitions, 4139 flow [2024-06-04 14:56:56,229 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} [2024-06-04 14:56:56,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-04 14:56:56,230 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 394 transitions, 4139 flow [2024-06-04 14:56:56,230 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) [2024-06-04 14:56:56,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:56,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:56,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:56:56,230 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)] === [2024-06-04 14:56:56,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1092631194, now seen corresponding path program 2 times [2024-06-04 14:56:56,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:56,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854151710] [2024-06-04 14:56:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:56,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:56,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854151710] [2024-06-04 14:56:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854151710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:56,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370500433] [2024-06-04 14:56:56,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:56,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:57,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:56:57,048 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) [2024-06-04 14:56:57,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:57,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:56:57,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:58,303 INFO L124 PetriNetUnfolderBase]: 3792/5830 cut-off events. [2024-06-04 14:56:58,303 INFO L125 PetriNetUnfolderBase]: For 978079/978079 co-relation queries the response was YES. [2024-06-04 14:56:58,361 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. [2024-06-04 14:56:58,386 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 30 changer transitions 0/413 dead transitions. [2024-06-04 14:56:58,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 413 transitions, 5064 flow [2024-06-04 14:56:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:56:58,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-04 14:56:58,387 INFO L175 Difference]: Start difference. First operand has 326 places, 394 transitions, 4139 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:56:58,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 413 transitions, 5064 flow [2024-06-04 14:57:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 413 transitions, 4934 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:00,361 INFO L231 Difference]: Finished difference. Result has 330 places, 397 transitions, 4141 flow [2024-06-04 14:57:00,361 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} [2024-06-04 14:57:00,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-04 14:57:00,362 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 397 transitions, 4141 flow [2024-06-04 14:57:00,362 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) [2024-06-04 14:57:00,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:00,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:00,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:57:00,362 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)] === [2024-06-04 14:57:00,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1608441302, now seen corresponding path program 5 times [2024-06-04 14:57:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:00,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602080053] [2024-06-04 14:57:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:00,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602080053] [2024-06-04 14:57:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602080053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:01,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:01,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270576485] [2024-06-04 14:57:01,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:01,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:01,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:01,195 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) [2024-06-04 14:57:01,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:01,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:01,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:02,474 INFO L124 PetriNetUnfolderBase]: 3802/5844 cut-off events. [2024-06-04 14:57:02,475 INFO L125 PetriNetUnfolderBase]: For 1002085/1002085 co-relation queries the response was YES. [2024-06-04 14:57:02,534 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. [2024-06-04 14:57:02,555 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 40 changer transitions 0/417 dead transitions. [2024-06-04 14:57:02,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 417 transitions, 5064 flow [2024-06-04 14:57:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:57:02,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:57:02,557 INFO L175 Difference]: Start difference. First operand has 330 places, 397 transitions, 4141 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:57:02,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 417 transitions, 5064 flow [2024-06-04 14:57:04,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 417 transitions, 4984 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:04,654 INFO L231 Difference]: Finished difference. Result has 333 places, 401 transitions, 4212 flow [2024-06-04 14:57:04,654 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} [2024-06-04 14:57:04,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-04 14:57:04,654 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 401 transitions, 4212 flow [2024-06-04 14:57:04,655 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) [2024-06-04 14:57:04,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:04,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:04,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:57:04,655 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)] === [2024-06-04 14:57:04,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1092393858, now seen corresponding path program 3 times [2024-06-04 14:57:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:04,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753630719] [2024-06-04 14:57:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:05,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753630719] [2024-06-04 14:57:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753630719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:05,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293215917] [2024-06-04 14:57:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:05,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:05,525 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) [2024-06-04 14:57:05,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:05,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:05,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:06,687 INFO L124 PetriNetUnfolderBase]: 3807/5851 cut-off events. [2024-06-04 14:57:06,687 INFO L125 PetriNetUnfolderBase]: For 1017429/1017429 co-relation queries the response was YES. [2024-06-04 14:57:06,745 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. [2024-06-04 14:57:06,766 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 394 selfloop transitions, 23 changer transitions 0/420 dead transitions. [2024-06-04 14:57:06,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 5161 flow [2024-06-04 14:57:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 14:57:06,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-04 14:57:06,767 INFO L175 Difference]: Start difference. First operand has 333 places, 401 transitions, 4212 flow. Second operand 8 states and 119 transitions. [2024-06-04 14:57:06,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 5161 flow [2024-06-04 14:57:08,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 420 transitions, 5080 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:08,718 INFO L231 Difference]: Finished difference. Result has 337 places, 404 transitions, 4259 flow [2024-06-04 14:57:08,719 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} [2024-06-04 14:57:08,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-04 14:57:08,719 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 404 transitions, 4259 flow [2024-06-04 14:57:08,719 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) [2024-06-04 14:57:08,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:08,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:08,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:57:08,720 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)] === [2024-06-04 14:57:08,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1608561272, now seen corresponding path program 6 times [2024-06-04 14:57:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286310800] [2024-06-04 14:57:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286310800] [2024-06-04 14:57:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286310800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:09,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044200731] [2024-06-04 14:57:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:09,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:09,515 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) [2024-06-04 14:57:09,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:09,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:09,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:10,775 INFO L124 PetriNetUnfolderBase]: 3825/5876 cut-off events. [2024-06-04 14:57:10,775 INFO L125 PetriNetUnfolderBase]: For 1046938/1046938 co-relation queries the response was YES. [2024-06-04 14:57:10,835 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. [2024-06-04 14:57:10,859 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 50 changer transitions 0/428 dead transitions. [2024-06-04 14:57:10,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 428 transitions, 5431 flow [2024-06-04 14:57:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:57:10,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:57:10,866 INFO L175 Difference]: Start difference. First operand has 337 places, 404 transitions, 4259 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:57:10,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 428 transitions, 5431 flow [2024-06-04 14:57:13,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 428 transitions, 5331 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:13,125 INFO L231 Difference]: Finished difference. Result has 340 places, 410 transitions, 4370 flow [2024-06-04 14:57:13,125 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} [2024-06-04 14:57:13,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 14:57:13,126 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 410 transitions, 4370 flow [2024-06-04 14:57:13,126 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) [2024-06-04 14:57:13,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:13,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:57:13,126 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)] === [2024-06-04 14:57:13,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:13,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1608561644, now seen corresponding path program 3 times [2024-06-04 14:57:13,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106224525] [2024-06-04 14:57:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106224525] [2024-06-04 14:57:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106224525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:13,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:13,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:13,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458926866] [2024-06-04 14:57:13,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:13,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:13,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:13,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:13,997 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) [2024-06-04 14:57:13,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:13,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:13,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:15,300 INFO L124 PetriNetUnfolderBase]: 3830/5883 cut-off events. [2024-06-04 14:57:15,300 INFO L125 PetriNetUnfolderBase]: For 1062329/1062329 co-relation queries the response was YES. [2024-06-04 14:57:15,354 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. [2024-06-04 14:57:15,372 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 35 changer transitions 0/429 dead transitions. [2024-06-04 14:57:15,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 429 transitions, 5309 flow [2024-06-04 14:57:15,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 14:57:15,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-04 14:57:15,374 INFO L175 Difference]: Start difference. First operand has 340 places, 410 transitions, 4370 flow. Second operand 8 states and 123 transitions. [2024-06-04 14:57:15,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 429 transitions, 5309 flow [2024-06-04 14:57:17,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 429 transitions, 5208 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:17,528 INFO L231 Difference]: Finished difference. Result has 343 places, 413 transitions, 4393 flow [2024-06-04 14:57:17,528 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} [2024-06-04 14:57:17,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-04 14:57:17,528 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 413 transitions, 4393 flow [2024-06-04 14:57:17,529 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) [2024-06-04 14:57:17,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:17,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:17,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:57:17,529 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)] === [2024-06-04 14:57:17,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:17,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1608438326, now seen corresponding path program 3 times [2024-06-04 14:57:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755061018] [2024-06-04 14:57:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:18,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755061018] [2024-06-04 14:57:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755061018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:18,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:18,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885891381] [2024-06-04 14:57:18,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:18,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:18,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:18,683 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) [2024-06-04 14:57:18,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:18,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:18,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:20,168 INFO L124 PetriNetUnfolderBase]: 3838/5895 cut-off events. [2024-06-04 14:57:20,168 INFO L125 PetriNetUnfolderBase]: For 1087913/1087913 co-relation queries the response was YES. [2024-06-04 14:57:20,220 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. [2024-06-04 14:57:20,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 390 selfloop transitions, 38 changer transitions 0/431 dead transitions. [2024-06-04 14:57:20,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 431 transitions, 5323 flow [2024-06-04 14:57:20,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:57:20,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:57:20,240 INFO L175 Difference]: Start difference. First operand has 343 places, 413 transitions, 4393 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:57:20,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 431 transitions, 5323 flow [2024-06-04 14:57:22,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 431 transitions, 5227 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:22,500 INFO L231 Difference]: Finished difference. Result has 345 places, 415 transitions, 4416 flow [2024-06-04 14:57:22,500 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} [2024-06-04 14:57:22,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-04 14:57:22,500 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 415 transitions, 4416 flow [2024-06-04 14:57:22,500 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) [2024-06-04 14:57:22,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:22,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:57:22,501 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)] === [2024-06-04 14:57:22,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1092639688, now seen corresponding path program 2 times [2024-06-04 14:57:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:22,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856505262] [2024-06-04 14:57:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:23,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856505262] [2024-06-04 14:57:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856505262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086515334] [2024-06-04 14:57:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:23,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:23,308 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) [2024-06-04 14:57:23,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:23,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:23,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:24,732 INFO L124 PetriNetUnfolderBase]: 3890/5967 cut-off events. [2024-06-04 14:57:24,733 INFO L125 PetriNetUnfolderBase]: For 1141057/1141057 co-relation queries the response was YES. [2024-06-04 14:57:24,795 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. [2024-06-04 14:57:24,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 78 changer transitions 0/446 dead transitions. [2024-06-04 14:57:24,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 446 transitions, 5878 flow [2024-06-04 14:57:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-04 14:57:24,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-04 14:57:24,820 INFO L175 Difference]: Start difference. First operand has 345 places, 415 transitions, 4416 flow. Second operand 9 states and 149 transitions. [2024-06-04 14:57:24,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 446 transitions, 5878 flow [2024-06-04 14:57:27,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 446 transitions, 5779 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:27,562 INFO L231 Difference]: Finished difference. Result has 348 places, 421 transitions, 4575 flow [2024-06-04 14:57:27,562 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} [2024-06-04 14:57:27,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-04 14:57:27,572 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 421 transitions, 4575 flow [2024-06-04 14:57:27,572 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) [2024-06-04 14:57:27,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:27,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:57:27,572 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)] === [2024-06-04 14:57:27,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1092627598, now seen corresponding path program 3 times [2024-06-04 14:57:27,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:27,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683315239] [2024-06-04 14:57:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:28,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:28,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683315239] [2024-06-04 14:57:28,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683315239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:28,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:28,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:28,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538986470] [2024-06-04 14:57:28,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:28,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:28,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:28,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:28,426 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) [2024-06-04 14:57:28,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:28,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:28,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:29,903 INFO L124 PetriNetUnfolderBase]: 3910/5995 cut-off events. [2024-06-04 14:57:29,904 INFO L125 PetriNetUnfolderBase]: For 1163601/1163601 co-relation queries the response was YES. [2024-06-04 14:57:29,967 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. [2024-06-04 14:57:29,990 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 368 selfloop transitions, 79 changer transitions 0/450 dead transitions. [2024-06-04 14:57:29,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 450 transitions, 6011 flow [2024-06-04 14:57:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:57:29,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:57:29,992 INFO L175 Difference]: Start difference. First operand has 348 places, 421 transitions, 4575 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:57:29,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 450 transitions, 6011 flow [2024-06-04 14:57:32,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 450 transitions, 5840 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:32,890 INFO L231 Difference]: Finished difference. Result has 352 places, 424 transitions, 4622 flow [2024-06-04 14:57:32,890 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} [2024-06-04 14:57:32,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-04 14:57:32,892 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 424 transitions, 4622 flow [2024-06-04 14:57:32,892 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) [2024-06-04 14:57:32,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:32,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:32,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:57:32,892 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)] === [2024-06-04 14:57:32,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1092281638, now seen corresponding path program 4 times [2024-06-04 14:57:32,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:32,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275056437] [2024-06-04 14:57:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:33,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:33,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275056437] [2024-06-04 14:57:33,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275056437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:33,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:33,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:33,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326975635] [2024-06-04 14:57:33,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:33,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:33,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:33,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:33,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:33,811 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) [2024-06-04 14:57:33,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:35,305 INFO L124 PetriNetUnfolderBase]: 3898/5979 cut-off events. [2024-06-04 14:57:35,305 INFO L125 PetriNetUnfolderBase]: For 1163026/1163026 co-relation queries the response was YES. [2024-06-04 14:57:35,368 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. [2024-06-04 14:57:35,390 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 77 changer transitions 0/450 dead transitions. [2024-06-04 14:57:35,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 450 transitions, 5802 flow [2024-06-04 14:57:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:35,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 14:57:35,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 14:57:35,392 INFO L175 Difference]: Start difference. First operand has 352 places, 424 transitions, 4622 flow. Second operand 9 states and 151 transitions. [2024-06-04 14:57:35,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 450 transitions, 5802 flow [2024-06-04 14:57:37,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 450 transitions, 5624 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:38,000 INFO L231 Difference]: Finished difference. Result has 355 places, 424 transitions, 4604 flow [2024-06-04 14:57:38,000 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} [2024-06-04 14:57:38,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-04 14:57:38,000 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 424 transitions, 4604 flow [2024-06-04 14:57:38,000 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) [2024-06-04 14:57:38,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:38,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:57:38,001 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)] === [2024-06-04 14:57:38,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:38,001 INFO L85 PathProgramCache]: Analyzing trace with hash 688430574, now seen corresponding path program 4 times [2024-06-04 14:57:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:38,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183156928] [2024-06-04 14:57:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:38,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:38,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183156928] [2024-06-04 14:57:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183156928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:38,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:38,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221958582] [2024-06-04 14:57:38,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:38,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:38,885 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) [2024-06-04 14:57:38,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:38,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:40,147 INFO L124 PetriNetUnfolderBase]: 3903/5987 cut-off events. [2024-06-04 14:57:40,147 INFO L125 PetriNetUnfolderBase]: For 1168047/1168053 co-relation queries the response was YES. [2024-06-04 14:57:40,211 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. [2024-06-04 14:57:40,233 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 29 changer transitions 0/447 dead transitions. [2024-06-04 14:57:40,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 447 transitions, 5643 flow [2024-06-04 14:57:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:57:40,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:57:40,235 INFO L175 Difference]: Start difference. First operand has 355 places, 424 transitions, 4604 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:57:40,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 447 transitions, 5643 flow [2024-06-04 14:57:42,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 447 transitions, 5457 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 14:57:42,345 INFO L231 Difference]: Finished difference. Result has 354 places, 427 transitions, 4584 flow [2024-06-04 14:57:42,346 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} [2024-06-04 14:57:42,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-04 14:57:42,346 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 427 transitions, 4584 flow [2024-06-04 14:57:42,346 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) [2024-06-04 14:57:42,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:42,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:42,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:57:42,347 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)] === [2024-06-04 14:57:42,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash 688251828, now seen corresponding path program 7 times [2024-06-04 14:57:42,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:42,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160743487] [2024-06-04 14:57:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:42,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160743487] [2024-06-04 14:57:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160743487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:43,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:43,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250412603] [2024-06-04 14:57:43,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:43,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:43,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:43,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:43,222 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) [2024-06-04 14:57:43,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:43,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:43,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:44,500 INFO L124 PetriNetUnfolderBase]: 3913/6004 cut-off events. [2024-06-04 14:57:44,501 INFO L125 PetriNetUnfolderBase]: For 1195562/1195571 co-relation queries the response was YES. [2024-06-04 14:57:44,563 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. [2024-06-04 14:57:44,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 103 changer transitions 0/457 dead transitions. [2024-06-04 14:57:44,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 457 transitions, 6132 flow [2024-06-04 14:57:44,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 14:57:44,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 14:57:44,587 INFO L175 Difference]: Start difference. First operand has 354 places, 427 transitions, 4584 flow. Second operand 8 states and 134 transitions. [2024-06-04 14:57:44,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 457 transitions, 6132 flow [2024-06-04 14:57:47,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 457 transitions, 5988 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:47,021 INFO L231 Difference]: Finished difference. Result has 356 places, 433 transitions, 4810 flow [2024-06-04 14:57:47,021 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} [2024-06-04 14:57:47,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-04 14:57:47,021 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 433 transitions, 4810 flow [2024-06-04 14:57:47,022 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) [2024-06-04 14:57:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:57:47,022 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)] === [2024-06-04 14:57:47,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash 694686684, now seen corresponding path program 5 times [2024-06-04 14:57:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:47,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266614082] [2024-06-04 14:57:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:47,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:47,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266614082] [2024-06-04 14:57:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266614082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:47,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:47,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502976943] [2024-06-04 14:57:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:47,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:47,918 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) [2024-06-04 14:57:47,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:47,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:47,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:49,316 INFO L124 PetriNetUnfolderBase]: 3926/6020 cut-off events. [2024-06-04 14:57:49,316 INFO L125 PetriNetUnfolderBase]: For 1222100/1222112 co-relation queries the response was YES. [2024-06-04 14:57:49,378 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. [2024-06-04 14:57:49,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 417 selfloop transitions, 42 changer transitions 0/462 dead transitions. [2024-06-04 14:57:49,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 462 transitions, 6211 flow [2024-06-04 14:57:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-04 14:57:49,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-04 14:57:49,401 INFO L175 Difference]: Start difference. First operand has 356 places, 433 transitions, 4810 flow. Second operand 10 states and 147 transitions. [2024-06-04 14:57:49,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 462 transitions, 6211 flow [2024-06-04 14:57:51,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 462 transitions, 5980 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:51,862 INFO L231 Difference]: Finished difference. Result has 362 places, 439 transitions, 4883 flow [2024-06-04 14:57:51,863 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} [2024-06-04 14:57:51,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-04 14:57:51,863 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 439 transitions, 4883 flow [2024-06-04 14:57:51,863 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) [2024-06-04 14:57:51,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:51,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 14:57:51,864 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)] === [2024-06-04 14:57:51,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 95337838, now seen corresponding path program 6 times [2024-06-04 14:57:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:51,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514326414] [2024-06-04 14:57:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:52,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:52,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514326414] [2024-06-04 14:57:52,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514326414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:52,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:52,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100933894] [2024-06-04 14:57:52,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:52,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:52,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:52,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:52,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:52,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:52,780 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) [2024-06-04 14:57:52,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:52,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:52,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:54,124 INFO L124 PetriNetUnfolderBase]: 3923/6016 cut-off events. [2024-06-04 14:57:54,124 INFO L125 PetriNetUnfolderBase]: For 1238962/1238974 co-relation queries the response was YES. [2024-06-04 14:57:54,183 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. [2024-06-04 14:57:54,203 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 41 changer transitions 0/456 dead transitions. [2024-06-04 14:57:54,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 456 transitions, 5836 flow [2024-06-04 14:57:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-04 14:57:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-04 14:57:54,204 INFO L175 Difference]: Start difference. First operand has 362 places, 439 transitions, 4883 flow. Second operand 8 states and 121 transitions. [2024-06-04 14:57:54,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 456 transitions, 5836 flow [2024-06-04 14:57:56,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 456 transitions, 5594 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:56,228 INFO L231 Difference]: Finished difference. Result has 364 places, 439 transitions, 4729 flow [2024-06-04 14:57:56,229 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} [2024-06-04 14:57:56,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 14:57:56,229 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 439 transitions, 4729 flow [2024-06-04 14:57:56,229 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) [2024-06-04 14:57:56,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:56,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:56,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 14:57:56,230 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)] === [2024-06-04 14:57:56,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:56,230 INFO L85 PathProgramCache]: Analyzing trace with hash 198427408, now seen corresponding path program 7 times [2024-06-04 14:57:56,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:56,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016468390] [2024-06-04 14:57:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:56,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:56,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016468390] [2024-06-04 14:57:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016468390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:56,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:56,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:56,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844744173] [2024-06-04 14:57:56,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:56,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:56,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:57,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:57:57,054 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) [2024-06-04 14:57:57,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:57,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:57:57,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:58,395 INFO L124 PetriNetUnfolderBase]: 3928/6023 cut-off events. [2024-06-04 14:57:58,395 INFO L125 PetriNetUnfolderBase]: For 1260435/1260447 co-relation queries the response was YES. [2024-06-04 14:57:58,450 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. [2024-06-04 14:57:58,469 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 80 changer transitions 0/464 dead transitions. [2024-06-04 14:57:58,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 464 transitions, 6358 flow [2024-06-04 14:57:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:57:58,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:57:58,470 INFO L175 Difference]: Start difference. First operand has 364 places, 439 transitions, 4729 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:57:58,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 464 transitions, 6358 flow [2024-06-04 14:58:00,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 464 transitions, 6276 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:00,819 INFO L231 Difference]: Finished difference. Result has 365 places, 445 transitions, 5039 flow [2024-06-04 14:58:00,820 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} [2024-06-04 14:58:00,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-04 14:58:00,820 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 445 transitions, 5039 flow [2024-06-04 14:58:00,820 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) [2024-06-04 14:58:00,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:00,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:00,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 14:58:00,821 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)] === [2024-06-04 14:58:00,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 688550358, now seen corresponding path program 8 times [2024-06-04 14:58:00,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:00,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431601965] [2024-06-04 14:58:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:00,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:01,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:01,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431601965] [2024-06-04 14:58:01,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431601965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:01,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096378449] [2024-06-04 14:58:01,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:01,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:01,666 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) [2024-06-04 14:58:01,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:01,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:01,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:03,099 INFO L124 PetriNetUnfolderBase]: 3938/6039 cut-off events. [2024-06-04 14:58:03,100 INFO L125 PetriNetUnfolderBase]: For 1292590/1292599 co-relation queries the response was YES. [2024-06-04 14:58:03,154 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. [2024-06-04 14:58:03,173 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 104 changer transitions 0/470 dead transitions. [2024-06-04 14:58:03,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 470 transitions, 6505 flow [2024-06-04 14:58:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-04 14:58:03,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-04 14:58:03,174 INFO L175 Difference]: Start difference. First operand has 365 places, 445 transitions, 5039 flow. Second operand 8 states and 133 transitions. [2024-06-04 14:58:03,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 470 transitions, 6505 flow [2024-06-04 14:58:05,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 470 transitions, 6293 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:05,624 INFO L231 Difference]: Finished difference. Result has 369 places, 448 transitions, 5073 flow [2024-06-04 14:58:05,624 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} [2024-06-04 14:58:05,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-04 14:58:05,624 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 448 transitions, 5073 flow [2024-06-04 14:58:05,624 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) [2024-06-04 14:58:05,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:05,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:05,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 14:58:05,625 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)] === [2024-06-04 14:58:05,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:05,625 INFO L85 PathProgramCache]: Analyzing trace with hash 688550730, now seen corresponding path program 4 times [2024-06-04 14:58:05,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:05,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517381444] [2024-06-04 14:58:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517381444] [2024-06-04 14:58:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517381444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:06,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:06,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248341516] [2024-06-04 14:58:06,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:06,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:06,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:06,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:06,495 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) [2024-06-04 14:58:06,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:06,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:06,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:07,778 INFO L124 PetriNetUnfolderBase]: 3943/6044 cut-off events. [2024-06-04 14:58:07,779 INFO L125 PetriNetUnfolderBase]: For 1304856/1304868 co-relation queries the response was YES. [2024-06-04 14:58:07,846 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. [2024-06-04 14:58:07,870 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 70 changer transitions 0/480 dead transitions. [2024-06-04 14:58:07,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 480 transitions, 6701 flow [2024-06-04 14:58:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-04 14:58:07,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-04 14:58:07,871 INFO L175 Difference]: Start difference. First operand has 369 places, 448 transitions, 5073 flow. Second operand 8 states and 127 transitions. [2024-06-04 14:58:07,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 480 transitions, 6701 flow [2024-06-04 14:58:10,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 480 transitions, 6492 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:10,517 INFO L231 Difference]: Finished difference. Result has 373 places, 461 transitions, 5249 flow [2024-06-04 14:58:10,517 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} [2024-06-04 14:58:10,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-04 14:58:10,517 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 461 transitions, 5249 flow [2024-06-04 14:58:10,517 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) [2024-06-04 14:58:10,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:10,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:10,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 14:58:10,518 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)] === [2024-06-04 14:58:10,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:10,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1043050734, now seen corresponding path program 8 times [2024-06-04 14:58:10,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:10,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985281114] [2024-06-04 14:58:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:10,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:11,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:11,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985281114] [2024-06-04 14:58:11,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985281114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:11,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:11,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480369685] [2024-06-04 14:58:11,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:11,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:11,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:11,392 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) [2024-06-04 14:58:11,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:11,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:11,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:12,711 INFO L124 PetriNetUnfolderBase]: 3956/6062 cut-off events. [2024-06-04 14:58:12,711 INFO L125 PetriNetUnfolderBase]: For 1336392/1336404 co-relation queries the response was YES. [2024-06-04 14:58:12,778 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. [2024-06-04 14:58:12,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 87 changer transitions 0/483 dead transitions. [2024-06-04 14:58:12,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 483 transitions, 6864 flow [2024-06-04 14:58:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:58:12,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:58:12,803 INFO L175 Difference]: Start difference. First operand has 373 places, 461 transitions, 5249 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:58:12,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 483 transitions, 6864 flow [2024-06-04 14:58:15,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 483 transitions, 6736 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 14:58:15,434 INFO L231 Difference]: Finished difference. Result has 378 places, 467 transitions, 5465 flow [2024-06-04 14:58:15,434 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} [2024-06-04 14:58:15,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 14:58:15,435 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 467 transitions, 5465 flow [2024-06-04 14:58:15,435 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) [2024-06-04 14:58:15,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:15,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:15,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 14:58:15,435 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)] === [2024-06-04 14:58:15,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 210391858, now seen corresponding path program 9 times [2024-06-04 14:58:15,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:15,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724335486] [2024-06-04 14:58:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:15,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:16,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724335486] [2024-06-04 14:58:16,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724335486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:16,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:16,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:16,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370688185] [2024-06-04 14:58:16,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:16,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:16,271 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) [2024-06-04 14:58:16,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:16,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:16,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:17,543 INFO L124 PetriNetUnfolderBase]: 3953/6058 cut-off events. [2024-06-04 14:58:17,543 INFO L125 PetriNetUnfolderBase]: For 1350263/1350275 co-relation queries the response was YES. [2024-06-04 14:58:17,612 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. [2024-06-04 14:58:17,634 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 393 selfloop transitions, 86 changer transitions 0/482 dead transitions. [2024-06-04 14:58:17,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 482 transitions, 6690 flow [2024-06-04 14:58:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 14:58:17,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-04 14:58:17,636 INFO L175 Difference]: Start difference. First operand has 378 places, 467 transitions, 5465 flow. Second operand 8 states and 123 transitions. [2024-06-04 14:58:17,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 482 transitions, 6690 flow [2024-06-04 14:58:20,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 482 transitions, 6435 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:20,800 INFO L231 Difference]: Finished difference. Result has 382 places, 467 transitions, 5388 flow [2024-06-04 14:58:20,800 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} [2024-06-04 14:58:20,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-04 14:58:20,800 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 467 transitions, 5388 flow [2024-06-04 14:58:20,800 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) [2024-06-04 14:58:20,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:20,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:20,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 14:58:20,801 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)] === [2024-06-04 14:58:20,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 210391672, now seen corresponding path program 9 times [2024-06-04 14:58:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:20,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273767075] [2024-06-04 14:58:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:21,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273767075] [2024-06-04 14:58:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273767075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:21,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760435042] [2024-06-04 14:58:21,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:21,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:21,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:21,698 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) [2024-06-04 14:58:21,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:21,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:21,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:23,011 INFO L124 PetriNetUnfolderBase]: 3963/6074 cut-off events. [2024-06-04 14:58:23,011 INFO L125 PetriNetUnfolderBase]: For 1379657/1379666 co-relation queries the response was YES. [2024-06-04 14:58:23,080 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. [2024-06-04 14:58:23,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 110 changer transitions 0/488 dead transitions. [2024-06-04 14:58:23,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 488 transitions, 6897 flow [2024-06-04 14:58:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-04 14:58:23,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 14:58:23,105 INFO L175 Difference]: Start difference. First operand has 382 places, 467 transitions, 5388 flow. Second operand 8 states and 128 transitions. [2024-06-04 14:58:23,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 488 transitions, 6897 flow [2024-06-04 14:58:26,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 488 transitions, 6713 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:26,895 INFO L231 Difference]: Finished difference. Result has 383 places, 470 transitions, 5465 flow [2024-06-04 14:58:26,895 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} [2024-06-04 14:58:26,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 14:58:26,896 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 470 transitions, 5465 flow [2024-06-04 14:58:26,896 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) [2024-06-04 14:58:26,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:26,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:26,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 14:58:26,896 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)] === [2024-06-04 14:58:26,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:26,897 INFO L85 PathProgramCache]: Analyzing trace with hash 210404134, now seen corresponding path program 5 times [2024-06-04 14:58:26,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:26,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380734635] [2024-06-04 14:58:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:26,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:27,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:27,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380734635] [2024-06-04 14:58:27,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380734635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:27,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:27,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:27,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390365102] [2024-06-04 14:58:27,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:27,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:27,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:27,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:27,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:27,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:27,816 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) [2024-06-04 14:58:27,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:27,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:27,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:29,132 INFO L124 PetriNetUnfolderBase]: 3976/6090 cut-off events. [2024-06-04 14:58:29,133 INFO L125 PetriNetUnfolderBase]: For 1403286/1403298 co-relation queries the response was YES. [2024-06-04 14:58:29,204 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. [2024-06-04 14:58:29,228 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 77 changer transitions 0/493 dead transitions. [2024-06-04 14:58:29,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 493 transitions, 7035 flow [2024-06-04 14:58:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:58:29,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:58:29,230 INFO L175 Difference]: Start difference. First operand has 383 places, 470 transitions, 5465 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:58:29,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 493 transitions, 7035 flow [2024-06-04 14:58:33,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 493 transitions, 6862 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:33,294 INFO L231 Difference]: Finished difference. Result has 386 places, 477 transitions, 5539 flow [2024-06-04 14:58:33,294 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} [2024-06-04 14:58:33,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-04 14:58:33,295 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 477 transitions, 5539 flow [2024-06-04 14:58:33,295 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) [2024-06-04 14:58:33,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:33,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:33,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 14:58:33,296 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)] === [2024-06-04 14:58:33,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 210392044, now seen corresponding path program 6 times [2024-06-04 14:58:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:33,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755646767] [2024-06-04 14:58:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:33,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:34,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:34,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755646767] [2024-06-04 14:58:34,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755646767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:34,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:34,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107210474] [2024-06-04 14:58:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:34,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:34,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:34,143 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) [2024-06-04 14:58:34,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:34,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:34,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:35,465 INFO L124 PetriNetUnfolderBase]: 3973/6086 cut-off events. [2024-06-04 14:58:35,466 INFO L125 PetriNetUnfolderBase]: For 1419952/1419964 co-relation queries the response was YES. [2024-06-04 14:58:35,536 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. [2024-06-04 14:58:35,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 414 selfloop transitions, 75 changer transitions 0/492 dead transitions. [2024-06-04 14:58:35,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 492 transitions, 6790 flow [2024-06-04 14:58:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-04 14:58:35,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-04 14:58:35,562 INFO L175 Difference]: Start difference. First operand has 386 places, 477 transitions, 5539 flow. Second operand 8 states and 124 transitions. [2024-06-04 14:58:35,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 492 transitions, 6790 flow [2024-06-04 14:58:39,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 492 transitions, 6639 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:39,305 INFO L231 Difference]: Finished difference. Result has 390 places, 477 transitions, 5544 flow [2024-06-04 14:58:39,305 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} [2024-06-04 14:58:39,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 14:58:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 477 transitions, 5544 flow [2024-06-04 14:58:39,305 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) [2024-06-04 14:58:39,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:39,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 14:58:39,306 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)] === [2024-06-04 14:58:39,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash 573840180, now seen corresponding path program 10 times [2024-06-04 14:58:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:39,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634014538] [2024-06-04 14:58:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:39,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:39,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634014538] [2024-06-04 14:58:39,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634014538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:39,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:39,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:39,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328394175] [2024-06-04 14:58:39,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:39,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:39,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:40,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:40,051 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) [2024-06-04 14:58:40,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:40,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:40,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:41,477 INFO L124 PetriNetUnfolderBase]: 3967/6080 cut-off events. [2024-06-04 14:58:41,477 INFO L125 PetriNetUnfolderBase]: For 1436969/1436978 co-relation queries the response was YES. [2024-06-04 14:58:41,549 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. [2024-06-04 14:58:41,573 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 39 changer transitions 0/488 dead transitions. [2024-06-04 14:58:41,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 488 transitions, 6542 flow [2024-06-04 14:58:41,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-04 14:58:41,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-04 14:58:41,575 INFO L175 Difference]: Start difference. First operand has 390 places, 477 transitions, 5544 flow. Second operand 8 states and 119 transitions. [2024-06-04 14:58:41,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 488 transitions, 6542 flow [2024-06-04 14:58:45,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 488 transitions, 6404 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:45,267 INFO L231 Difference]: Finished difference. Result has 393 places, 477 transitions, 5490 flow [2024-06-04 14:58:45,267 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} [2024-06-04 14:58:45,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 14:58:45,267 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 477 transitions, 5490 flow [2024-06-04 14:58:45,268 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) [2024-06-04 14:58:45,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:45,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:45,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 14:58:45,268 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)] === [2024-06-04 14:58:45,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:45,269 INFO L85 PathProgramCache]: Analyzing trace with hash 929154604, now seen corresponding path program 7 times [2024-06-04 14:58:45,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:45,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399466898] [2024-06-04 14:58:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:45,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:46,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:46,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399466898] [2024-06-04 14:58:46,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399466898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:46,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:46,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051942411] [2024-06-04 14:58:46,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:46,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:46,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:46,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:46,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:46,145 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) [2024-06-04 14:58:46,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:46,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:46,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:47,514 INFO L124 PetriNetUnfolderBase]: 3972/6085 cut-off events. [2024-06-04 14:58:47,514 INFO L125 PetriNetUnfolderBase]: For 1453284/1453296 co-relation queries the response was YES. [2024-06-04 14:58:47,584 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. [2024-06-04 14:58:47,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 34 changer transitions 0/492 dead transitions. [2024-06-04 14:58:47,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 492 transitions, 6797 flow [2024-06-04 14:58:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-04 14:58:47,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-04 14:58:47,609 INFO L175 Difference]: Start difference. First operand has 393 places, 477 transitions, 5490 flow. Second operand 8 states and 117 transitions. [2024-06-04 14:58:47,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 492 transitions, 6797 flow [2024-06-04 14:58:51,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 492 transitions, 6693 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:51,475 INFO L231 Difference]: Finished difference. Result has 394 places, 480 transitions, 5520 flow [2024-06-04 14:58:51,475 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} [2024-06-04 14:58:51,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-04 14:58:51,475 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 480 transitions, 5520 flow [2024-06-04 14:58:51,475 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) [2024-06-04 14:58:51,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:51,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 14:58:51,476 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)] === [2024-06-04 14:58:51,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1215124724, now seen corresponding path program 8 times [2024-06-04 14:58:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121257759] [2024-06-04 14:58:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:51,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121257759] [2024-06-04 14:58:52,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121257759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:52,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:52,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212457935] [2024-06-04 14:58:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:52,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:52,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:52,288 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) [2024-06-04 14:58:52,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:52,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:52,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:53,596 INFO L124 PetriNetUnfolderBase]: 3977/6092 cut-off events. [2024-06-04 14:58:53,596 INFO L125 PetriNetUnfolderBase]: For 1476909/1476921 co-relation queries the response was YES. [2024-06-04 14:58:53,671 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. [2024-06-04 14:58:53,696 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 38 changer transitions 0/496 dead transitions. [2024-06-04 14:58:53,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 496 transitions, 6828 flow [2024-06-04 14:58:53,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-04 14:58:53,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-04 14:58:53,698 INFO L175 Difference]: Start difference. First operand has 394 places, 480 transitions, 5520 flow. Second operand 8 states and 116 transitions. [2024-06-04 14:58:53,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 496 transitions, 6828 flow [2024-06-04 14:58:57,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 496 transitions, 6708 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 14:58:57,570 INFO L231 Difference]: Finished difference. Result has 397 places, 484 transitions, 5554 flow [2024-06-04 14:58:57,570 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} [2024-06-04 14:58:57,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-04 14:58:57,571 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 484 transitions, 5554 flow [2024-06-04 14:58:57,571 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) [2024-06-04 14:58:57,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:57,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:57,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 14:58:57,571 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)] === [2024-06-04 14:58:57,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:57,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1364672112, now seen corresponding path program 10 times [2024-06-04 14:58:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:57,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817085393] [2024-06-04 14:58:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:58,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:58,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817085393] [2024-06-04 14:58:58,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817085393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:58,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:58,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506877665] [2024-06-04 14:58:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:58,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:58:58,424 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) [2024-06-04 14:58:58,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:58,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:58:58,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:59,762 INFO L124 PetriNetUnfolderBase]: 3982/6099 cut-off events. [2024-06-04 14:58:59,763 INFO L125 PetriNetUnfolderBase]: For 1501203/1501215 co-relation queries the response was YES. [2024-06-04 14:58:59,837 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. [2024-06-04 14:58:59,862 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 455 selfloop transitions, 41 changer transitions 0/499 dead transitions. [2024-06-04 14:58:59,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 499 transitions, 6904 flow [2024-06-04 14:58:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-04 14:58:59,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-04 14:58:59,863 INFO L175 Difference]: Start difference. First operand has 397 places, 484 transitions, 5554 flow. Second operand 8 states and 116 transitions. [2024-06-04 14:58:59,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 499 transitions, 6904 flow [2024-06-04 14:59:03,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 499 transitions, 6805 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:03,673 INFO L231 Difference]: Finished difference. Result has 400 places, 487 transitions, 5628 flow [2024-06-04 14:59:03,674 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} [2024-06-04 14:59:03,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 14:59:03,674 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 487 transitions, 5628 flow [2024-06-04 14:59:03,674 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) [2024-06-04 14:59:03,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:03,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:03,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 14:59:03,675 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)] === [2024-06-04 14:59:03,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash -182995798, now seen corresponding path program 11 times [2024-06-04 14:59:03,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:03,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264717592] [2024-06-04 14:59:03,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:03,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:04,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:04,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264717592] [2024-06-04 14:59:04,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264717592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:04,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:04,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:04,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710671608] [2024-06-04 14:59:04,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:04,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:04,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:04,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:04,490 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) [2024-06-04 14:59:04,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:04,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:04,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:05,831 INFO L124 PetriNetUnfolderBase]: 3976/6093 cut-off events. [2024-06-04 14:59:05,831 INFO L125 PetriNetUnfolderBase]: For 1517091/1517100 co-relation queries the response was YES. [2024-06-04 14:59:05,903 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. [2024-06-04 14:59:05,928 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 67 changer transitions 0/500 dead transitions. [2024-06-04 14:59:05,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 500 transitions, 6898 flow [2024-06-04 14:59:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-04 14:59:05,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-06-04 14:59:05,930 INFO L175 Difference]: Start difference. First operand has 400 places, 487 transitions, 5628 flow. Second operand 8 states and 122 transitions. [2024-06-04 14:59:05,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 500 transitions, 6898 flow [2024-06-04 14:59:09,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 500 transitions, 6620 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:09,609 INFO L231 Difference]: Finished difference. Result has 400 places, 487 transitions, 5490 flow [2024-06-04 14:59:09,609 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} [2024-06-04 14:59:09,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 14:59:09,610 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 487 transitions, 5490 flow [2024-06-04 14:59:09,610 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) [2024-06-04 14:59:09,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:09,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 14:59:09,610 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)] === [2024-06-04 14:59:09,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1958039818, now seen corresponding path program 9 times [2024-06-04 14:59:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:09,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241902420] [2024-06-04 14:59:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:10,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:10,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241902420] [2024-06-04 14:59:10,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241902420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:10,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:10,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:10,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389174577] [2024-06-04 14:59:10,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:10,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:10,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:10,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:10,381 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) [2024-06-04 14:59:10,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:10,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:10,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:11,753 INFO L124 PetriNetUnfolderBase]: 3981/6098 cut-off events. [2024-06-04 14:59:11,754 INFO L125 PetriNetUnfolderBase]: For 1529900/1529912 co-relation queries the response was YES. [2024-06-04 14:59:11,829 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. [2024-06-04 14:59:11,854 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 30 changer transitions 0/501 dead transitions. [2024-06-04 14:59:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 501 transitions, 6571 flow [2024-06-04 14:59:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-04 14:59:11,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-04 14:59:11,855 INFO L175 Difference]: Start difference. First operand has 400 places, 487 transitions, 5490 flow. Second operand 8 states and 114 transitions. [2024-06-04 14:59:11,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 501 transitions, 6571 flow [2024-06-04 14:59:14,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 501 transitions, 6312 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:14,771 INFO L231 Difference]: Finished difference. Result has 400 places, 490 transitions, 5357 flow [2024-06-04 14:59:14,772 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} [2024-06-04 14:59:14,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-04 14:59:14,772 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 490 transitions, 5357 flow [2024-06-04 14:59:14,772 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) [2024-06-04 14:59:14,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:14,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:14,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 14:59:14,775 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)] === [2024-06-04 14:59:14,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:14,775 INFO L85 PathProgramCache]: Analyzing trace with hash 443132502, now seen corresponding path program 10 times [2024-06-04 14:59:14,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:14,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080378944] [2024-06-04 14:59:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:15,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:15,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080378944] [2024-06-04 14:59:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080378944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:15,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:15,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:15,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017678820] [2024-06-04 14:59:15,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:15,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:15,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:15,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:15,538 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) [2024-06-04 14:59:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:15,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:16,971 INFO L124 PetriNetUnfolderBase]: 3978/6094 cut-off events. [2024-06-04 14:59:16,972 INFO L125 PetriNetUnfolderBase]: For 1542406/1542418 co-relation queries the response was YES. [2024-06-04 14:59:17,041 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. [2024-06-04 14:59:17,065 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 29 changer transitions 0/501 dead transitions. [2024-06-04 14:59:17,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 501 transitions, 6384 flow [2024-06-04 14:59:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-04 14:59:17,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2024-06-04 14:59:17,069 INFO L175 Difference]: Start difference. First operand has 400 places, 490 transitions, 5357 flow. Second operand 8 states and 115 transitions. [2024-06-04 14:59:17,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 501 transitions, 6384 flow [2024-06-04 14:59:20,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 501 transitions, 6280 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:20,430 INFO L231 Difference]: Finished difference. Result has 402 places, 490 transitions, 5317 flow [2024-06-04 14:59:20,430 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} [2024-06-04 14:59:20,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-04 14:59:20,436 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 490 transitions, 5317 flow [2024-06-04 14:59:20,437 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) [2024-06-04 14:59:20,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:20,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:20,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 14:59:20,439 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)] === [2024-06-04 14:59:20,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:20,439 INFO L85 PathProgramCache]: Analyzing trace with hash 442894980, now seen corresponding path program 12 times [2024-06-04 14:59:20,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:20,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865039073] [2024-06-04 14:59:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:21,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865039073] [2024-06-04 14:59:21,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865039073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:21,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:21,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709650942] [2024-06-04 14:59:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:21,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:21,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:21,316 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) [2024-06-04 14:59:21,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:21,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:21,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:22,805 INFO L124 PetriNetUnfolderBase]: 3972/6088 cut-off events. [2024-06-04 14:59:22,806 INFO L125 PetriNetUnfolderBase]: For 1559193/1559202 co-relation queries the response was YES. [2024-06-04 14:59:22,873 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. [2024-06-04 14:59:22,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 46 changer transitions 0/503 dead transitions. [2024-06-04 14:59:22,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 503 transitions, 6599 flow [2024-06-04 14:59:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-04 14:59:22,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-04 14:59:22,897 INFO L175 Difference]: Start difference. First operand has 402 places, 490 transitions, 5317 flow. Second operand 8 states and 123 transitions. [2024-06-04 14:59:22,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 503 transitions, 6599 flow [2024-06-04 14:59:27,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 503 transitions, 6513 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:27,095 INFO L231 Difference]: Finished difference. Result has 403 places, 490 transitions, 5329 flow [2024-06-04 14:59:27,095 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} [2024-06-04 14:59:27,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 14:59:27,096 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 490 transitions, 5329 flow [2024-06-04 14:59:27,096 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) [2024-06-04 14:59:27,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:27,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 14:59:27,097 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)] === [2024-06-04 14:59:27,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1364909076, now seen corresponding path program 11 times [2024-06-04 14:59:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:27,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085553530] [2024-06-04 14:59:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:27,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:27,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085553530] [2024-06-04 14:59:27,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085553530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:27,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:27,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:27,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957094144] [2024-06-04 14:59:27,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:27,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:27,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:28,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:28,001 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) [2024-06-04 14:59:28,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:28,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:28,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:29,347 INFO L124 PetriNetUnfolderBase]: 3977/6093 cut-off events. [2024-06-04 14:59:29,347 INFO L125 PetriNetUnfolderBase]: For 1575809/1575821 co-relation queries the response was YES. [2024-06-04 14:59:29,411 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. [2024-06-04 14:59:29,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 62 changer transitions 0/505 dead transitions. [2024-06-04 14:59:29,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 505 transitions, 6663 flow [2024-06-04 14:59:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-04 14:59:29,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-04 14:59:29,432 INFO L175 Difference]: Start difference. First operand has 403 places, 490 transitions, 5329 flow. Second operand 8 states and 118 transitions. [2024-06-04 14:59:29,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 505 transitions, 6663 flow [2024-06-04 14:59:33,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 505 transitions, 6474 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:33,306 INFO L231 Difference]: Finished difference. Result has 403 places, 493 transitions, 5317 flow [2024-06-04 14:59:33,306 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} [2024-06-04 14:59:33,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 14:59:33,307 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 493 transitions, 5317 flow [2024-06-04 14:59:33,307 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) [2024-06-04 14:59:33,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:33,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:33,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 14:59:33,307 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)] === [2024-06-04 14:59:33,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1558305172, now seen corresponding path program 11 times [2024-06-04 14:59:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:33,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56649774] [2024-06-04 14:59:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56649774] [2024-06-04 14:59:34,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56649774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:34,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675806578] [2024-06-04 14:59:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:34,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:34,134 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) [2024-06-04 14:59:34,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:34,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:34,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:35,561 INFO L124 PetriNetUnfolderBase]: 3974/6089 cut-off events. [2024-06-04 14:59:35,561 INFO L125 PetriNetUnfolderBase]: For 1591677/1591689 co-relation queries the response was YES. [2024-06-04 14:59:35,627 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. [2024-06-04 14:59:35,648 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 479 selfloop transitions, 22 changer transitions 0/504 dead transitions. [2024-06-04 14:59:35,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 504 transitions, 6350 flow [2024-06-04 14:59:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:35,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-04 14:59:35,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-04 14:59:35,650 INFO L175 Difference]: Start difference. First operand has 403 places, 493 transitions, 5317 flow. Second operand 8 states and 113 transitions. [2024-06-04 14:59:35,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 504 transitions, 6350 flow [2024-06-04 14:59:39,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 504 transitions, 6114 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:59:39,107 INFO L231 Difference]: Finished difference. Result has 405 places, 493 transitions, 5131 flow [2024-06-04 14:59:39,107 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} [2024-06-04 14:59:39,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-04 14:59:39,108 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 493 transitions, 5131 flow [2024-06-04 14:59:39,108 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) [2024-06-04 14:59:39,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:39,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 14:59:39,108 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)] === [2024-06-04 14:59:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1735436692, now seen corresponding path program 12 times [2024-06-04 14:59:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:39,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054710662] [2024-06-04 14:59:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:39,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054710662] [2024-06-04 14:59:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054710662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:39,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946105510] [2024-06-04 14:59:39,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:39,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:39,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:39,978 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) [2024-06-04 14:59:39,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:39,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:39,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:41,384 INFO L124 PetriNetUnfolderBase]: 3971/6085 cut-off events. [2024-06-04 14:59:41,384 INFO L125 PetriNetUnfolderBase]: For 1607519/1607531 co-relation queries the response was YES. [2024-06-04 14:59:41,449 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. [2024-06-04 14:59:41,471 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 462 selfloop transitions, 39 changer transitions 0/504 dead transitions. [2024-06-04 14:59:41,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 504 transitions, 6164 flow [2024-06-04 14:59:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-04 14:59:41,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-04 14:59:41,472 INFO L175 Difference]: Start difference. First operand has 405 places, 493 transitions, 5131 flow. Second operand 8 states and 116 transitions. [2024-06-04 14:59:41,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 504 transitions, 6164 flow [2024-06-04 14:59:44,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 504 transitions, 6040 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:44,703 INFO L231 Difference]: Finished difference. Result has 406 places, 493 transitions, 5091 flow [2024-06-04 14:59:44,703 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} [2024-06-04 14:59:44,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-04 14:59:44,704 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 493 transitions, 5091 flow [2024-06-04 14:59:44,704 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) [2024-06-04 14:59:44,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:44,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:44,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 14:59:44,705 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)] === [2024-06-04 14:59:44,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:44,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1735852588, now seen corresponding path program 12 times [2024-06-04 14:59:44,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:44,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869111549] [2024-06-04 14:59:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:44,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:45,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:45,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869111549] [2024-06-04 14:59:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869111549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:45,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:59:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202324864] [2024-06-04 14:59:45,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:59:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:59:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:59:45,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:45,513 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) [2024-06-04 14:59:45,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:45,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:45,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:46,942 INFO L124 PetriNetUnfolderBase]: 3968/6081 cut-off events. [2024-06-04 14:59:46,943 INFO L125 PetriNetUnfolderBase]: For 1623678/1623690 co-relation queries the response was YES. [2024-06-04 14:59:47,006 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. [2024-06-04 14:59:47,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 63 changer transitions 0/504 dead transitions. [2024-06-04 14:59:47,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 504 transitions, 6124 flow [2024-06-04 14:59:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:59:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:59:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-04 14:59:47,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-04 14:59:47,028 INFO L175 Difference]: Start difference. First operand has 406 places, 493 transitions, 5091 flow. Second operand 8 states and 117 transitions. [2024-06-04 14:59:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 504 transitions, 6124 flow [2024-06-04 14:59:49,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 504 transitions, 5986 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:49,938 INFO L231 Difference]: Finished difference. Result has 406 places, 493 transitions, 5085 flow [2024-06-04 14:59:49,939 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} [2024-06-04 14:59:49,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-04 14:59:49,939 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 493 transitions, 5085 flow [2024-06-04 14:59:49,939 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) [2024-06-04 14:59:49,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:49,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:49,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 14:59:49,940 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)] === [2024-06-04 14:59:49,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1958451932, now seen corresponding path program 5 times [2024-06-04 14:59:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:49,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735461557] [2024-06-04 14:59:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:50,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735461557] [2024-06-04 14:59:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735461557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158283970] [2024-06-04 14:59:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:50,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:50,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:50,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:50,887 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) [2024-06-04 14:59:50,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:50,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:50,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:52,522 INFO L124 PetriNetUnfolderBase]: 3988/6107 cut-off events. [2024-06-04 14:59:52,522 INFO L125 PetriNetUnfolderBase]: For 1673810/1673810 co-relation queries the response was YES. [2024-06-04 14:59:52,586 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. [2024-06-04 14:59:52,607 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 23 changer transitions 0/510 dead transitions. [2024-06-04 14:59:52,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 510 transitions, 6188 flow [2024-06-04 14:59:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-04 14:59:52,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-04 14:59:52,608 INFO L175 Difference]: Start difference. First operand has 406 places, 493 transitions, 5085 flow. Second operand 9 states and 126 transitions. [2024-06-04 14:59:52,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 510 transitions, 6188 flow [2024-06-04 14:59:57,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 510 transitions, 6038 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:57,344 INFO L231 Difference]: Finished difference. Result has 408 places, 496 transitions, 5044 flow [2024-06-04 14:59:57,344 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} [2024-06-04 14:59:57,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-04 14:59:57,344 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 496 transitions, 5044 flow [2024-06-04 14:59:57,345 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) [2024-06-04 14:59:57,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:57,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:57,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 14:59:57,345 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)] === [2024-06-04 14:59:57,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:57,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1558182040, now seen corresponding path program 4 times [2024-06-04 14:59:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:57,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018358449] [2024-06-04 14:59:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:57,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:58,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:58,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018358449] [2024-06-04 14:59:58,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018358449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:58,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:58,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141920490] [2024-06-04 14:59:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:58,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:58,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:58,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:58,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 14:59:58,492 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) [2024-06-04 14:59:58,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:58,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 14:59:58,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:00,085 INFO L124 PetriNetUnfolderBase]: 3983/6104 cut-off events. [2024-06-04 15:00:00,085 INFO L125 PetriNetUnfolderBase]: For 1665937/1665946 co-relation queries the response was YES. [2024-06-04 15:00:00,153 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. [2024-06-04 15:00:00,175 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 467 selfloop transitions, 37 changer transitions 0/507 dead transitions. [2024-06-04 15:00:00,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 507 transitions, 6078 flow [2024-06-04 15:00:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:00:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:00:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-04 15:00:00,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35119047619047616 [2024-06-04 15:00:00,177 INFO L175 Difference]: Start difference. First operand has 408 places, 496 transitions, 5044 flow. Second operand 8 states and 118 transitions. [2024-06-04 15:00:00,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 507 transitions, 6078 flow [2024-06-04 15:00:04,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 507 transitions, 5980 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:04,149 INFO L231 Difference]: Finished difference. Result has 409 places, 496 transitions, 5025 flow [2024-06-04 15:00:04,149 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} [2024-06-04 15:00:04,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-04 15:00:04,149 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 496 transitions, 5025 flow [2024-06-04 15:00:04,150 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) [2024-06-04 15:00:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:04,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:04,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 15:00:04,150 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)] === [2024-06-04 15:00:04,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1542153002, now seen corresponding path program 6 times [2024-06-04 15:00:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875316242] [2024-06-04 15:00:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:04,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:04,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875316242] [2024-06-04 15:00:04,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875316242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:04,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:04,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:04,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18847018] [2024-06-04 15:00:04,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:04,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:04,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:04,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:04,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:05,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:05,027 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) [2024-06-04 15:00:05,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:05,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:05,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:06,635 INFO L124 PetriNetUnfolderBase]: 4003/6132 cut-off events. [2024-06-04 15:00:06,635 INFO L125 PetriNetUnfolderBase]: For 1708203/1708212 co-relation queries the response was YES. [2024-06-04 15:00:06,704 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. [2024-06-04 15:00:06,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 431 selfloop transitions, 85 changer transitions 0/519 dead transitions. [2024-06-04 15:00:06,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 519 transitions, 6436 flow [2024-06-04 15:00:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-04 15:00:06,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-04 15:00:06,729 INFO L175 Difference]: Start difference. First operand has 409 places, 496 transitions, 5025 flow. Second operand 9 states and 142 transitions. [2024-06-04 15:00:06,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 519 transitions, 6436 flow [2024-06-04 15:00:11,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 519 transitions, 6342 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:11,307 INFO L231 Difference]: Finished difference. Result has 411 places, 499 transitions, 5164 flow [2024-06-04 15:00:11,307 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} [2024-06-04 15:00:11,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-04 15:00:11,308 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 499 transitions, 5164 flow [2024-06-04 15:00:11,308 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) [2024-06-04 15:00:11,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:11,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:11,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 15:00:11,308 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)] === [2024-06-04 15:00:11,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:11,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1558538912, now seen corresponding path program 7 times [2024-06-04 15:00:11,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:11,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657683649] [2024-06-04 15:00:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:11,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:12,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657683649] [2024-06-04 15:00:12,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657683649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:12,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:12,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:12,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653494918] [2024-06-04 15:00:12,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:12,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:12,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:12,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:12,204 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) [2024-06-04 15:00:12,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:12,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:12,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:13,997 INFO L124 PetriNetUnfolderBase]: 4055/6204 cut-off events. [2024-06-04 15:00:13,997 INFO L125 PetriNetUnfolderBase]: For 1771413/1771422 co-relation queries the response was YES. [2024-06-04 15:00:14,063 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. [2024-06-04 15:00:14,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 88 changer transitions 0/528 dead transitions. [2024-06-04 15:00:14,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 528 transitions, 6938 flow [2024-06-04 15:00:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:00:14,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:00:14,085 INFO L175 Difference]: Start difference. First operand has 411 places, 499 transitions, 5164 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:00:14,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 528 transitions, 6938 flow [2024-06-04 15:00:18,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 528 transitions, 6636 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:18,864 INFO L231 Difference]: Finished difference. Result has 412 places, 505 transitions, 5170 flow [2024-06-04 15:00:18,864 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} [2024-06-04 15:00:18,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-04 15:00:18,865 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 505 transitions, 5170 flow [2024-06-04 15:00:18,865 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) [2024-06-04 15:00:18,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:18,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:18,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 15:00:18,865 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)] === [2024-06-04 15:00:18,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:18,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1558551002, now seen corresponding path program 8 times [2024-06-04 15:00:18,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:18,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478728955] [2024-06-04 15:00:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:18,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:19,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:19,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478728955] [2024-06-04 15:00:19,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478728955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:19,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:19,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260945414] [2024-06-04 15:00:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:19,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:19,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:19,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:19,749 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) [2024-06-04 15:00:19,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:19,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:19,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:21,474 INFO L124 PetriNetUnfolderBase]: 4043/6188 cut-off events. [2024-06-04 15:00:21,475 INFO L125 PetriNetUnfolderBase]: For 1759597/1759606 co-relation queries the response was YES. [2024-06-04 15:00:21,543 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. [2024-06-04 15:00:21,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 434 selfloop transitions, 89 changer transitions 0/526 dead transitions. [2024-06-04 15:00:21,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 526 transitions, 6546 flow [2024-06-04 15:00:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:00:21,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:00:21,567 INFO L175 Difference]: Start difference. First operand has 412 places, 505 transitions, 5170 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:00:21,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 526 transitions, 6546 flow [2024-06-04 15:00:26,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 526 transitions, 6330 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:26,190 INFO L231 Difference]: Finished difference. Result has 416 places, 505 transitions, 5138 flow [2024-06-04 15:00:26,190 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} [2024-06-04 15:00:26,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-04 15:00:26,191 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 505 transitions, 5138 flow [2024-06-04 15:00:26,191 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) [2024-06-04 15:00:26,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:26,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:26,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 15:00:26,191 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)] === [2024-06-04 15:00:26,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1142297642, now seen corresponding path program 9 times [2024-06-04 15:00:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:26,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983280209] [2024-06-04 15:00:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:26,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:26,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:26,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983280209] [2024-06-04 15:00:26,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983280209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:26,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797357559] [2024-06-04 15:00:26,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:27,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:27,059 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) [2024-06-04 15:00:27,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:27,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:27,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:28,774 INFO L124 PetriNetUnfolderBase]: 4063/6216 cut-off events. [2024-06-04 15:00:28,774 INFO L125 PetriNetUnfolderBase]: For 1785395/1785404 co-relation queries the response was YES. [2024-06-04 15:00:28,842 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. [2024-06-04 15:00:28,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 96 changer transitions 0/528 dead transitions. [2024-06-04 15:00:28,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 528 transitions, 6577 flow [2024-06-04 15:00:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:28,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:00:28,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-04 15:00:28,865 INFO L175 Difference]: Start difference. First operand has 416 places, 505 transitions, 5138 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:00:28,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 528 transitions, 6577 flow [2024-06-04 15:00:33,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 528 transitions, 6385 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:33,528 INFO L231 Difference]: Finished difference. Result has 417 places, 508 transitions, 5205 flow [2024-06-04 15:00:33,528 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} [2024-06-04 15:00:33,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 15:00:33,528 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 508 transitions, 5205 flow [2024-06-04 15:00:33,528 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) [2024-06-04 15:00:33,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:33,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:33,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 15:00:33,529 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)] === [2024-06-04 15:00:33,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:33,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1142309732, now seen corresponding path program 10 times [2024-06-04 15:00:33,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:33,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763258868] [2024-06-04 15:00:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:33,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:34,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763258868] [2024-06-04 15:00:34,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763258868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:34,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:34,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653223716] [2024-06-04 15:00:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:34,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:00:34,413 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) [2024-06-04 15:00:34,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:34,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:00:34,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:36,153 INFO L124 PetriNetUnfolderBase]: 4051/6200 cut-off events. [2024-06-04 15:00:36,154 INFO L125 PetriNetUnfolderBase]: For 1774692/1774701 co-relation queries the response was YES. [2024-06-04 15:00:36,224 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. [2024-06-04 15:00:36,246 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 426 selfloop transitions, 97 changer transitions 0/526 dead transitions. [2024-06-04 15:00:36,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 526 transitions, 6305 flow [2024-06-04 15:00:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-04 15:00:36,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-04 15:00:36,248 INFO L175 Difference]: Start difference. First operand has 417 places, 508 transitions, 5205 flow. Second operand 9 states and 140 transitions. [2024-06-04 15:00:36,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 526 transitions, 6305 flow [2024-06-04 15:00:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 526 transitions, 6018 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:41,678 INFO L231 Difference]: Finished difference. Result has 419 places, 508 transitions, 5118 flow [2024-06-04 15:00:41,678 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} [2024-06-04 15:00:41,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-04 15:00:41,679 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 508 transitions, 5118 flow [2024-06-04 15:00:41,679 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) [2024-06-04 15:00:41,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:41,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:41,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 15:00:41,679 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)] === [2024-06-04 15:00:41,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 92489806, now seen corresponding path program 1 times [2024-06-04 15:00:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:41,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505372226] [2024-06-04 15:00:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505372226] [2024-06-04 15:00:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505372226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:42,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:42,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785666643] [2024-06-04 15:00:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:42,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:42,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:42,757 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) [2024-06-04 15:00:42,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:42,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:42,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:44,263 INFO L124 PetriNetUnfolderBase]: 3903/6043 cut-off events. [2024-06-04 15:00:44,263 INFO L125 PetriNetUnfolderBase]: For 1529345/1529367 co-relation queries the response was YES. [2024-06-04 15:00:44,334 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. [2024-06-04 15:00:44,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 29 changer transitions 0/539 dead transitions. [2024-06-04 15:00:44,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 539 transitions, 6612 flow [2024-06-04 15:00:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:00:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:00:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-04 15:00:44,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-04 15:00:44,358 INFO L175 Difference]: Start difference. First operand has 419 places, 508 transitions, 5118 flow. Second operand 10 states and 157 transitions. [2024-06-04 15:00:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 539 transitions, 6612 flow [2024-06-04 15:00:51,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 539 transitions, 6374 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 15:00:51,019 INFO L231 Difference]: Finished difference. Result has 420 places, 512 transitions, 5083 flow [2024-06-04 15:00:51,019 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} [2024-06-04 15:00:51,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-04 15:00:51,019 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 512 transitions, 5083 flow [2024-06-04 15:00:51,020 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) [2024-06-04 15:00:51,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:51,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 15:00:51,020 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)] === [2024-06-04 15:00:51,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 206053966, now seen corresponding path program 2 times [2024-06-04 15:00:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414911187] [2024-06-04 15:00:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:52,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:52,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414911187] [2024-06-04 15:00:52,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414911187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:52,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:52,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:00:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494947882] [2024-06-04 15:00:52,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:52,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:00:52,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:00:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:00:52,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:00:52,251 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) [2024-06-04 15:00:52,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:52,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:00:52,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:53,683 INFO L124 PetriNetUnfolderBase]: 3911/6055 cut-off events. [2024-06-04 15:00:53,683 INFO L125 PetriNetUnfolderBase]: For 1549929/1549951 co-relation queries the response was YES. [2024-06-04 15:00:53,756 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. [2024-06-04 15:00:53,778 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 481 selfloop transitions, 26 changer transitions 0/536 dead transitions. [2024-06-04 15:00:53,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 536 transitions, 6221 flow [2024-06-04 15:00:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:00:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:00:53,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-04 15:00:53,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619047619047619 [2024-06-04 15:00:53,779 INFO L175 Difference]: Start difference. First operand has 420 places, 512 transitions, 5083 flow. Second operand 10 states and 152 transitions. [2024-06-04 15:00:53,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 536 transitions, 6221 flow [2024-06-04 15:01:00,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 536 transitions, 6074 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:00,582 INFO L231 Difference]: Finished difference. Result has 424 places, 514 transitions, 5067 flow [2024-06-04 15:01:00,583 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} [2024-06-04 15:01:00,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 15:01:00,583 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 514 transitions, 5067 flow [2024-06-04 15:01:00,583 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) [2024-06-04 15:01:00,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:00,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:00,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 15:01:00,584 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)] === [2024-06-04 15:01:00,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1466153908, now seen corresponding path program 1 times [2024-06-04 15:01:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:00,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910302160] [2024-06-04 15:01:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:00,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:01,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:01,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910302160] [2024-06-04 15:01:01,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910302160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:01,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:01,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:01,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221053506] [2024-06-04 15:01:01,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:01,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:01,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:01,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:01,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:01,718 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) [2024-06-04 15:01:01,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:01,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:01,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:03,171 INFO L124 PetriNetUnfolderBase]: 3948/6107 cut-off events. [2024-06-04 15:01:03,171 INFO L125 PetriNetUnfolderBase]: For 1601784/1601806 co-relation queries the response was YES. [2024-06-04 15:01:03,249 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. [2024-06-04 15:01:03,271 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 31 changer transitions 0/545 dead transitions. [2024-06-04 15:01:03,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 545 transitions, 6565 flow [2024-06-04 15:01:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:01:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:01:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-04 15:01:03,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-04 15:01:03,273 INFO L175 Difference]: Start difference. First operand has 424 places, 514 transitions, 5067 flow. Second operand 10 states and 158 transitions. [2024-06-04 15:01:03,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 545 transitions, 6565 flow [2024-06-04 15:01:09,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 545 transitions, 6482 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:01:09,148 INFO L231 Difference]: Finished difference. Result has 426 places, 520 transitions, 5182 flow [2024-06-04 15:01:09,148 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} [2024-06-04 15:01:09,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-04 15:01:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 520 transitions, 5182 flow [2024-06-04 15:01:09,149 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) [2024-06-04 15:01:09,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:09,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:09,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 15:01:09,149 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)] === [2024-06-04 15:01:09,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash -152169300, now seen corresponding path program 2 times [2024-06-04 15:01:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816014844] [2024-06-04 15:01:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:10,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:10,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816014844] [2024-06-04 15:01:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816014844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:10,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:10,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836878499] [2024-06-04 15:01:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:10,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:10,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:10,408 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) [2024-06-04 15:01:10,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:10,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:10,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:11,879 INFO L124 PetriNetUnfolderBase]: 3958/6123 cut-off events. [2024-06-04 15:01:11,879 INFO L125 PetriNetUnfolderBase]: For 1627174/1627196 co-relation queries the response was YES. [2024-06-04 15:01:11,952 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. [2024-06-04 15:01:11,975 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 492 selfloop transitions, 21 changer transitions 0/542 dead transitions. [2024-06-04 15:01:11,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 542 transitions, 6326 flow [2024-06-04 15:01:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-04 15:01:11,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-04 15:01:11,976 INFO L175 Difference]: Start difference. First operand has 426 places, 520 transitions, 5182 flow. Second operand 9 states and 138 transitions. [2024-06-04 15:01:11,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 542 transitions, 6326 flow [2024-06-04 15:01:18,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 542 transitions, 6213 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-04 15:01:18,769 INFO L231 Difference]: Finished difference. Result has 429 places, 523 transitions, 5191 flow [2024-06-04 15:01:18,769 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} [2024-06-04 15:01:18,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-04 15:01:18,770 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 523 transitions, 5191 flow [2024-06-04 15:01:18,770 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) [2024-06-04 15:01:18,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:18,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:18,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 15:01:18,771 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)] === [2024-06-04 15:01:18,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:18,771 INFO L85 PathProgramCache]: Analyzing trace with hash 95346766, now seen corresponding path program 3 times [2024-06-04 15:01:18,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:18,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526782533] [2024-06-04 15:01:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:18,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526782533] [2024-06-04 15:01:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526782533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:19,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:19,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:19,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440695346] [2024-06-04 15:01:19,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:19,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:19,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:19,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:19,975 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) [2024-06-04 15:01:19,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:19,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:19,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:21,489 INFO L124 PetriNetUnfolderBase]: 3953/6116 cut-off events. [2024-06-04 15:01:21,489 INFO L125 PetriNetUnfolderBase]: For 1629830/1629852 co-relation queries the response was YES. [2024-06-04 15:01:21,567 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. [2024-06-04 15:01:21,592 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 20 changer transitions 0/541 dead transitions. [2024-06-04 15:01:21,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 541 transitions, 6259 flow [2024-06-04 15:01:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:21,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 136 transitions. [2024-06-04 15:01:21,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35978835978835977 [2024-06-04 15:01:21,593 INFO L175 Difference]: Start difference. First operand has 429 places, 523 transitions, 5191 flow. Second operand 9 states and 136 transitions. [2024-06-04 15:01:21,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 541 transitions, 6259 flow [2024-06-04 15:01:27,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 541 transitions, 6149 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:27,658 INFO L231 Difference]: Finished difference. Result has 431 places, 523 transitions, 5126 flow [2024-06-04 15:01:27,658 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} [2024-06-04 15:01:27,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-04 15:01:27,658 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 523 transitions, 5126 flow [2024-06-04 15:01:27,658 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) [2024-06-04 15:01:27,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:27,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:27,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 15:01:27,659 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)] === [2024-06-04 15:01:27,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash 95346890, now seen corresponding path program 3 times [2024-06-04 15:01:27,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:27,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144046237] [2024-06-04 15:01:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:27,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:28,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144046237] [2024-06-04 15:01:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144046237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:28,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:28,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:28,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630997440] [2024-06-04 15:01:28,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:28,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:28,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:28,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:28,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:28,816 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) [2024-06-04 15:01:28,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:28,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:28,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:30,307 INFO L124 PetriNetUnfolderBase]: 3947/6108 cut-off events. [2024-06-04 15:01:30,307 INFO L125 PetriNetUnfolderBase]: For 1631855/1631877 co-relation queries the response was YES. [2024-06-04 15:01:30,377 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. [2024-06-04 15:01:30,396 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 488 selfloop transitions, 26 changer transitions 0/543 dead transitions. [2024-06-04 15:01:30,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 543 transitions, 6208 flow [2024-06-04 15:01:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-04 15:01:30,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-04 15:01:30,398 INFO L175 Difference]: Start difference. First operand has 431 places, 523 transitions, 5126 flow. Second operand 9 states and 141 transitions. [2024-06-04 15:01:30,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 543 transitions, 6208 flow [2024-06-04 15:01:37,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 543 transitions, 6128 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 15:01:37,177 INFO L231 Difference]: Finished difference. Result has 432 places, 523 transitions, 5104 flow [2024-06-04 15:01:37,177 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} [2024-06-04 15:01:37,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-04 15:01:37,178 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 523 transitions, 5104 flow [2024-06-04 15:01:37,178 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) [2024-06-04 15:01:37,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:37,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:37,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 15:01:37,178 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)] === [2024-06-04 15:01:37,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:37,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1043237416, now seen corresponding path program 4 times [2024-06-04 15:01:37,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:37,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139885671] [2024-06-04 15:01:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:37,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:38,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:38,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139885671] [2024-06-04 15:01:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139885671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:38,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:38,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108839961] [2024-06-04 15:01:38,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:38,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:38,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:38,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:38,229 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) [2024-06-04 15:01:38,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:38,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:38,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:39,670 INFO L124 PetriNetUnfolderBase]: 3946/6108 cut-off events. [2024-06-04 15:01:39,670 INFO L125 PetriNetUnfolderBase]: For 1647144/1647166 co-relation queries the response was YES. [2024-06-04 15:01:39,753 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. [2024-06-04 15:01:39,779 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 65 changer transitions 0/549 dead transitions. [2024-06-04 15:01:39,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 549 transitions, 6660 flow [2024-06-04 15:01:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-04 15:01:39,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-04 15:01:39,781 INFO L175 Difference]: Start difference. First operand has 432 places, 523 transitions, 5104 flow. Second operand 9 states and 146 transitions. [2024-06-04 15:01:39,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 549 transitions, 6660 flow [2024-06-04 15:01:45,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 549 transitions, 6580 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:01:45,626 INFO L231 Difference]: Finished difference. Result has 434 places, 529 transitions, 5359 flow [2024-06-04 15:01:45,626 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} [2024-06-04 15:01:45,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 15:01:45,627 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 529 transitions, 5359 flow [2024-06-04 15:01:45,627 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) [2024-06-04 15:01:45,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:45,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:45,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 15:01:45,627 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)] === [2024-06-04 15:01:45,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1470737878, now seen corresponding path program 5 times [2024-06-04 15:01:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:45,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796387624] [2024-06-04 15:01:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:46,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796387624] [2024-06-04 15:01:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796387624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:46,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:46,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:46,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014316041] [2024-06-04 15:01:46,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:46,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:46,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:46,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:46,868 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) [2024-06-04 15:01:46,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:46,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:48,279 INFO L124 PetriNetUnfolderBase]: 3974/6148 cut-off events. [2024-06-04 15:01:48,279 INFO L125 PetriNetUnfolderBase]: For 1696375/1696397 co-relation queries the response was YES. [2024-06-04 15:01:48,354 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. [2024-06-04 15:01:48,378 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 459 selfloop transitions, 67 changer transitions 0/555 dead transitions. [2024-06-04 15:01:48,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 555 transitions, 6901 flow [2024-06-04 15:01:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:01:48,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-04 15:01:48,380 INFO L175 Difference]: Start difference. First operand has 434 places, 529 transitions, 5359 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:01:48,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 555 transitions, 6901 flow [2024-06-04 15:01:53,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 555 transitions, 6791 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:53,640 INFO L231 Difference]: Finished difference. Result has 438 places, 535 transitions, 5543 flow [2024-06-04 15:01:53,640 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} [2024-06-04 15:01:53,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 15:01:53,640 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 535 transitions, 5543 flow [2024-06-04 15:01:53,641 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) [2024-06-04 15:01:53,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:53,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:53,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 15:01:53,641 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)] === [2024-06-04 15:01:53,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:53,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1046915918, now seen corresponding path program 4 times [2024-06-04 15:01:53,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:53,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459121176] [2024-06-04 15:01:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:54,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:54,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459121176] [2024-06-04 15:01:54,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459121176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:54,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:54,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:01:54,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744274876] [2024-06-04 15:01:54,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:54,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:01:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:01:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:01:55,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:01:55,044 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) [2024-06-04 15:01:55,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:55,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:01:55,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:56,526 INFO L124 PetriNetUnfolderBase]: 3999/6182 cut-off events. [2024-06-04 15:01:56,526 INFO L125 PetriNetUnfolderBase]: For 1733489/1733511 co-relation queries the response was YES. [2024-06-04 15:01:56,604 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. [2024-06-04 15:01:56,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 32 changer transitions 0/552 dead transitions. [2024-06-04 15:01:56,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 552 transitions, 6701 flow [2024-06-04 15:01:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:01:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:01:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-04 15:01:56,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36243386243386244 [2024-06-04 15:01:56,632 INFO L175 Difference]: Start difference. First operand has 438 places, 535 transitions, 5543 flow. Second operand 9 states and 137 transitions. [2024-06-04 15:01:56,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 552 transitions, 6701 flow [2024-06-04 15:02:02,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 552 transitions, 6538 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:02,285 INFO L231 Difference]: Finished difference. Result has 442 places, 537 transitions, 5529 flow [2024-06-04 15:02:02,286 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} [2024-06-04 15:02:02,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 15:02:02,286 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 537 transitions, 5529 flow [2024-06-04 15:02:02,286 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) [2024-06-04 15:02:02,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:02,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 15:02:02,287 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)] === [2024-06-04 15:02:02,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1043064436, now seen corresponding path program 6 times [2024-06-04 15:02:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419834111] [2024-06-04 15:02:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:03,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419834111] [2024-06-04 15:02:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419834111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:03,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:03,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35803648] [2024-06-04 15:02:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:03,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:03,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:03,422 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) [2024-06-04 15:02:03,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:03,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:03,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:04,908 INFO L124 PetriNetUnfolderBase]: 3985/6164 cut-off events. [2024-06-04 15:02:04,909 INFO L125 PetriNetUnfolderBase]: For 1733166/1733188 co-relation queries the response was YES. [2024-06-04 15:02:04,990 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. [2024-06-04 15:02:05,017 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 64 changer transitions 0/558 dead transitions. [2024-06-04 15:02:05,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 558 transitions, 6953 flow [2024-06-04 15:02:05,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:02:05,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-04 15:02:05,018 INFO L175 Difference]: Start difference. First operand has 442 places, 537 transitions, 5529 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:02:05,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 558 transitions, 6953 flow [2024-06-04 15:02:12,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 558 transitions, 6792 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:12,244 INFO L231 Difference]: Finished difference. Result has 444 places, 537 transitions, 5502 flow [2024-06-04 15:02:12,244 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} [2024-06-04 15:02:12,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-04 15:02:12,245 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 537 transitions, 5502 flow [2024-06-04 15:02:12,245 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) [2024-06-04 15:02:12,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:12,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 15:02:12,245 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)] === [2024-06-04 15:02:12,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash 751515688, now seen corresponding path program 7 times [2024-06-04 15:02:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:12,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584321244] [2024-06-04 15:02:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:12,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:13,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:13,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584321244] [2024-06-04 15:02:13,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584321244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:13,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:13,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:13,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913841472] [2024-06-04 15:02:13,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:13,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:13,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:13,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:13,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:13,386 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) [2024-06-04 15:02:13,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:13,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:13,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:15,078 INFO L124 PetriNetUnfolderBase]: 3984/6164 cut-off events. [2024-06-04 15:02:15,078 INFO L125 PetriNetUnfolderBase]: For 1744625/1744647 co-relation queries the response was YES. [2024-06-04 15:02:15,148 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. [2024-06-04 15:02:15,171 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 485 selfloop transitions, 43 changer transitions 0/557 dead transitions. [2024-06-04 15:02:15,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 557 transitions, 6996 flow [2024-06-04 15:02:15,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-04 15:02:15,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-04 15:02:15,172 INFO L175 Difference]: Start difference. First operand has 444 places, 537 transitions, 5502 flow. Second operand 9 states and 140 transitions. [2024-06-04 15:02:15,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 557 transitions, 6996 flow [2024-06-04 15:02:22,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 557 transitions, 6881 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:22,225 INFO L231 Difference]: Finished difference. Result has 446 places, 540 transitions, 5567 flow [2024-06-04 15:02:22,225 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} [2024-06-04 15:02:22,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-04 15:02:22,226 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 540 transitions, 5567 flow [2024-06-04 15:02:22,226 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) [2024-06-04 15:02:22,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:22,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:22,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 15:02:22,226 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)] === [2024-06-04 15:02:22,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1208698796, now seen corresponding path program 5 times [2024-06-04 15:02:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:22,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399743698] [2024-06-04 15:02:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:22,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:23,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399743698] [2024-06-04 15:02:23,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399743698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:23,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:23,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:23,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255895868] [2024-06-04 15:02:23,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:23,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:23,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:23,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:23,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:23,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:23,515 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) [2024-06-04 15:02:23,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:23,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:23,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:25,126 INFO L124 PetriNetUnfolderBase]: 3987/6167 cut-off events. [2024-06-04 15:02:25,126 INFO L125 PetriNetUnfolderBase]: For 1745516/1745538 co-relation queries the response was YES. [2024-06-04 15:02:25,203 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. [2024-06-04 15:02:25,228 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 20 changer transitions 0/554 dead transitions. [2024-06-04 15:02:25,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 554 transitions, 6727 flow [2024-06-04 15:02:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-04 15:02:25,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439153439153439 [2024-06-04 15:02:25,230 INFO L175 Difference]: Start difference. First operand has 446 places, 540 transitions, 5567 flow. Second operand 9 states and 130 transitions. [2024-06-04 15:02:25,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 554 transitions, 6727 flow [2024-06-04 15:02:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 554 transitions, 6517 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-04 15:02:31,875 INFO L231 Difference]: Finished difference. Result has 447 places, 542 transitions, 5488 flow [2024-06-04 15:02:31,875 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} [2024-06-04 15:02:31,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-04 15:02:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 542 transitions, 5488 flow [2024-06-04 15:02:31,876 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) [2024-06-04 15:02:31,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:31,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:31,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 15:02:31,876 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)] === [2024-06-04 15:02:31,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1364663060, now seen corresponding path program 8 times [2024-06-04 15:02:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:31,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601486303] [2024-06-04 15:02:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:31,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:32,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:32,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601486303] [2024-06-04 15:02:32,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601486303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:32,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038531897] [2024-06-04 15:02:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:32,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:32,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:32,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:32,971 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) [2024-06-04 15:02:32,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:32,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:32,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:34,523 INFO L124 PetriNetUnfolderBase]: 4000/6187 cut-off events. [2024-06-04 15:02:34,523 INFO L125 PetriNetUnfolderBase]: For 1778018/1778040 co-relation queries the response was YES. [2024-06-04 15:02:34,603 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. [2024-06-04 15:02:34,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 56 changer transitions 0/569 dead transitions. [2024-06-04 15:02:34,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 569 transitions, 7752 flow [2024-06-04 15:02:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-04 15:02:34,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-04 15:02:34,631 INFO L175 Difference]: Start difference. First operand has 447 places, 542 transitions, 5488 flow. Second operand 9 states and 142 transitions. [2024-06-04 15:02:34,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 569 transitions, 7752 flow [2024-06-04 15:02:41,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 569 transitions, 7637 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-04 15:02:41,063 INFO L231 Difference]: Finished difference. Result has 450 places, 551 transitions, 5766 flow [2024-06-04 15:02:41,063 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} [2024-06-04 15:02:41,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-04 15:02:41,064 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 551 transitions, 5766 flow [2024-06-04 15:02:41,064 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) [2024-06-04 15:02:41,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:41,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:41,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 15:02:41,064 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)] === [2024-06-04 15:02:41,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1364658410, now seen corresponding path program 9 times [2024-06-04 15:02:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:41,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998024054] [2024-06-04 15:02:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:41,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:42,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:42,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998024054] [2024-06-04 15:02:42,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998024054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:42,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:42,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:42,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089520524] [2024-06-04 15:02:42,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:42,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:42,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:02:42,081 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) [2024-06-04 15:02:42,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:42,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:02:42,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:43,589 INFO L124 PetriNetUnfolderBase]: 4015/6208 cut-off events. [2024-06-04 15:02:43,590 INFO L125 PetriNetUnfolderBase]: For 1803312/1803334 co-relation queries the response was YES. [2024-06-04 15:02:43,671 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. [2024-06-04 15:02:43,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 494 selfloop transitions, 48 changer transitions 0/571 dead transitions. [2024-06-04 15:02:43,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 571 transitions, 7588 flow [2024-06-04 15:02:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:43,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-04 15:02:43,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-04 15:02:43,698 INFO L175 Difference]: Start difference. First operand has 450 places, 551 transitions, 5766 flow. Second operand 9 states and 140 transitions. [2024-06-04 15:02:43,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 571 transitions, 7588 flow [2024-06-04 15:02:50,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 571 transitions, 7393 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-04 15:02:50,588 INFO L231 Difference]: Finished difference. Result has 456 places, 554 transitions, 5775 flow [2024-06-04 15:02:50,588 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} [2024-06-04 15:02:50,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-04 15:02:50,589 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 554 transitions, 5775 flow [2024-06-04 15:02:50,589 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) [2024-06-04 15:02:50,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:50,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 15:02:50,589 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)] === [2024-06-04 15:02:50,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1128006456, now seen corresponding path program 1 times [2024-06-04 15:02:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072971128] [2024-06-04 15:02:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072971128] [2024-06-04 15:02:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072971128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:51,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:51,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:02:51,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858116334] [2024-06-04 15:02:51,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:51,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:02:51,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:02:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:02:51,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:02:51,731 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) [2024-06-04 15:02:51,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:51,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:02:51,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:53,415 INFO L124 PetriNetUnfolderBase]: 4220/6436 cut-off events. [2024-06-04 15:02:53,415 INFO L125 PetriNetUnfolderBase]: For 2120315/2120315 co-relation queries the response was YES. [2024-06-04 15:02:53,501 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. [2024-06-04 15:02:53,529 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 542 selfloop transitions, 23 changer transitions 0/568 dead transitions. [2024-06-04 15:02:53,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 568 transitions, 6979 flow [2024-06-04 15:02:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:02:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:02:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-04 15:02:53,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33630952380952384 [2024-06-04 15:02:53,530 INFO L175 Difference]: Start difference. First operand has 456 places, 554 transitions, 5775 flow. Second operand 8 states and 113 transitions. [2024-06-04 15:02:53,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 568 transitions, 6979 flow [2024-06-04 15:02:59,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 568 transitions, 6831 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 15:03:00,001 INFO L231 Difference]: Finished difference. Result has 458 places, 557 transitions, 5735 flow [2024-06-04 15:03:00,001 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} [2024-06-04 15:03:00,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-04 15:03:00,001 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 557 transitions, 5735 flow [2024-06-04 15:03:00,002 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) [2024-06-04 15:03:00,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:00,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:00,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 15:03:00,002 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)] === [2024-06-04 15:03:00,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1136584280, now seen corresponding path program 10 times [2024-06-04 15:03:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662044677] [2024-06-04 15:03:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:00,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662044677] [2024-06-04 15:03:01,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662044677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:01,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:01,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:01,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757298397] [2024-06-04 15:03:01,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:01,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-04 15:03:01,137 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) [2024-06-04 15:03:01,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:01,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-04 15:03:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:02,882 INFO L124 PetriNetUnfolderBase]: 4010/6202 cut-off events. [2024-06-04 15:03:02,882 INFO L125 PetriNetUnfolderBase]: For 1823836/1823858 co-relation queries the response was YES. [2024-06-04 15:03:02,953 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. [2024-06-04 15:03:02,975 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 517 selfloop transitions, 28 changer transitions 0/574 dead transitions. [2024-06-04 15:03:02,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 574 transitions, 6925 flow [2024-06-04 15:03:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:03:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:03:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-04 15:03:02,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-04 15:03:02,977 INFO L175 Difference]: Start difference. First operand has 458 places, 557 transitions, 5735 flow. Second operand 9 states and 133 transitions. [2024-06-04 15:03:02,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 574 transitions, 6925 flow [2024-06-04 15:03:09,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 574 transitions, 6827 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 15:03:09,831 INFO L231 Difference]: Finished difference. Result has 459 places, 560 transitions, 5767 flow [2024-06-04 15:03:09,832 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} [2024-06-04 15:03:09,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-04 15:03:09,833 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 560 transitions, 5767 flow [2024-06-04 15:03:09,833 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) [2024-06-04 15:03:09,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:09,848 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] [2024-06-04 15:03:09,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 15:03:09,848 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)] === [2024-06-04 15:03:09,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2049376127, now seen corresponding path program 1 times [2024-06-04 15:03:09,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:09,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294345073] [2024-06-04 15:03:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:09,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:10,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:10,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294345073] [2024-06-04 15:03:10,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294345073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:10,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:10,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084220605] [2024-06-04 15:03:10,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:10,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:10,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:10,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:10,879 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) [2024-06-04 15:03:10,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:10,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:10,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:12,593 INFO L124 PetriNetUnfolderBase]: 4216/6431 cut-off events. [2024-06-04 15:03:12,594 INFO L125 PetriNetUnfolderBase]: For 2140110/2140110 co-relation queries the response was YES. [2024-06-04 15:03:12,676 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. [2024-06-04 15:03:12,704 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 522 selfloop transitions, 62 changer transitions 0/587 dead transitions. [2024-06-04 15:03:12,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 587 transitions, 7316 flow [2024-06-04 15:03:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-04 15:03:12,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-04 15:03:12,706 INFO L175 Difference]: Start difference. First operand has 459 places, 560 transitions, 5767 flow. Second operand 8 states and 134 transitions. [2024-06-04 15:03:12,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 587 transitions, 7316 flow [2024-06-04 15:03:20,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 587 transitions, 7200 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:20,279 INFO L231 Difference]: Finished difference. Result has 460 places, 560 transitions, 5785 flow [2024-06-04 15:03:20,280 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} [2024-06-04 15:03:20,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-04 15:03:20,280 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 560 transitions, 5785 flow [2024-06-04 15:03:20,280 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) [2024-06-04 15:03:20,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:20,280 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] [2024-06-04 15:03:20,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 15:03:20,281 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)] === [2024-06-04 15:03:20,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2055090047, now seen corresponding path program 2 times [2024-06-04 15:03:20,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:20,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656816154] [2024-06-04 15:03:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:20,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656816154] [2024-06-04 15:03:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656816154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:21,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629866942] [2024-06-04 15:03:21,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:21,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:21,288 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) [2024-06-04 15:03:21,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:21,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:21,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:22,968 INFO L124 PetriNetUnfolderBase]: 4221/6438 cut-off events. [2024-06-04 15:03:22,968 INFO L125 PetriNetUnfolderBase]: For 2167635/2167635 co-relation queries the response was YES. [2024-06-04 15:03:23,060 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. [2024-06-04 15:03:23,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 43 changer transitions 0/585 dead transitions. [2024-06-04 15:03:23,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 585 transitions, 7057 flow [2024-06-04 15:03:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:03:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:03:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-04 15:03:23,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-04 15:03:23,090 INFO L175 Difference]: Start difference. First operand has 460 places, 560 transitions, 5785 flow. Second operand 8 states and 129 transitions. [2024-06-04 15:03:23,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 585 transitions, 7057 flow [2024-06-04 15:03:31,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 585 transitions, 6879 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 15:03:31,515 INFO L231 Difference]: Finished difference. Result has 460 places, 563 transitions, 5754 flow [2024-06-04 15:03:31,515 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} [2024-06-04 15:03:31,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-04 15:03:31,515 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 563 transitions, 5754 flow [2024-06-04 15:03:31,516 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) [2024-06-04 15:03:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:31,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:03:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 15:03:31,516 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)] === [2024-06-04 15:03:31,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash 376487570, now seen corresponding path program 1 times [2024-06-04 15:03:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562500083] [2024-06-04 15:03:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:32,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:32,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562500083] [2024-06-04 15:03:32,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562500083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:32,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:32,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:32,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717510911] [2024-06-04 15:03:32,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:32,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:32,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:32,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:32,419 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) [2024-06-04 15:03:32,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:32,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:32,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:34,156 INFO L124 PetriNetUnfolderBase]: 4231/6452 cut-off events. [2024-06-04 15:03:34,156 INFO L125 PetriNetUnfolderBase]: For 2180302/2180302 co-relation queries the response was YES. [2024-06-04 15:03:34,251 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. [2024-06-04 15:03:34,281 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 569 selfloop transitions, 25 changer transitions 0/597 dead transitions. [2024-06-04 15:03:34,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 597 transitions, 7125 flow [2024-06-04 15:03:34,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:03:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:03:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-04 15:03:34,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-04 15:03:34,283 INFO L175 Difference]: Start difference. First operand has 460 places, 563 transitions, 5754 flow. Second operand 9 states and 144 transitions. [2024-06-04 15:03:34,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 597 transitions, 7125 flow [2024-06-04 15:03:42,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 597 transitions, 7027 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:42,695 INFO L231 Difference]: Finished difference. Result has 462 places, 566 transitions, 5812 flow [2024-06-04 15:03:42,696 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} [2024-06-04 15:03:42,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-04 15:03:42,696 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 566 transitions, 5812 flow [2024-06-04 15:03:42,696 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) [2024-06-04 15:03:42,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:42,696 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] [2024-06-04 15:03:42,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 15:03:42,697 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)] === [2024-06-04 15:03:42,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -979956850, now seen corresponding path program 2 times [2024-06-04 15:03:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:42,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59580773] [2024-06-04 15:03:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:43,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:43,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59580773] [2024-06-04 15:03:43,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59580773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:43,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199996433] [2024-06-04 15:03:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:43,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:43,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:43,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:43,548 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) [2024-06-04 15:03:43,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:43,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:45,456 INFO L124 PetriNetUnfolderBase]: 4257/6488 cut-off events. [2024-06-04 15:03:45,456 INFO L125 PetriNetUnfolderBase]: For 2207184/2207184 co-relation queries the response was YES. [2024-06-04 15:03:45,531 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. [2024-06-04 15:03:45,555 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 536 selfloop transitions, 62 changer transitions 0/601 dead transitions. [2024-06-04 15:03:45,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 601 transitions, 7597 flow [2024-06-04 15:03:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:03:45,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:03:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:03:45,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-04 15:03:45,557 INFO L175 Difference]: Start difference. First operand has 462 places, 566 transitions, 5812 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:03:45,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 601 transitions, 7597 flow [2024-06-04 15:03:52,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 601 transitions, 7449 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 15:03:52,738 INFO L231 Difference]: Finished difference. Result has 464 places, 572 transitions, 6000 flow [2024-06-04 15:03:52,738 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} [2024-06-04 15:03:52,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-04 15:03:52,739 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 572 transitions, 6000 flow [2024-06-04 15:03:52,739 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) [2024-06-04 15:03:52,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:03:52,739 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] [2024-06-04 15:03:52,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 15:03:52,739 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)] === [2024-06-04 15:03:52,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:03:52,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2136337048, now seen corresponding path program 1 times [2024-06-04 15:03:52,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:03:52,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144283181] [2024-06-04 15:03:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:03:52,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:03:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:03:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:03:53,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:03:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144283181] [2024-06-04 15:03:53,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144283181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:03:53,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:03:53,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:03:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628783785] [2024-06-04 15:03:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:03:53,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:03:53,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:03:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:03:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:03:53,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:03:53,589 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) [2024-06-04 15:03:53,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:03:53,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:03:53,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:03:55,398 INFO L124 PetriNetUnfolderBase]: 4283/6524 cut-off events. [2024-06-04 15:03:55,398 INFO L125 PetriNetUnfolderBase]: For 2264005/2264005 co-relation queries the response was YES. [2024-06-04 15:03:55,482 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. [2024-06-04 15:03:55,510 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 526 selfloop transitions, 91 changer transitions 0/620 dead transitions. [2024-06-04 15:03:55,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 620 transitions, 7807 flow [2024-06-04 15:03:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:03:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:03:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:03:55,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-04 15:03:55,512 INFO L175 Difference]: Start difference. First operand has 464 places, 572 transitions, 6000 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:03:55,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 620 transitions, 7807 flow [2024-06-04 15:04:03,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 620 transitions, 7623 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-04 15:04:03,616 INFO L231 Difference]: Finished difference. Result has 469 places, 591 transitions, 6221 flow [2024-06-04 15:04:03,617 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} [2024-06-04 15:04:03,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 15:04:03,617 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 591 transitions, 6221 flow [2024-06-04 15:04:03,617 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) [2024-06-04 15:04:03,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:03,617 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] [2024-06-04 15:04:03,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 15:04:03,618 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)] === [2024-06-04 15:04:03,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:03,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1981261578, now seen corresponding path program 2 times [2024-06-04 15:04:03,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:03,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103003134] [2024-06-04 15:04:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:03,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:04,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103003134] [2024-06-04 15:04:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103003134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:04,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:04,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:04,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889779249] [2024-06-04 15:04:04,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:04,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:04,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:04,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:04,493 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) [2024-06-04 15:04:04,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:04,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:04,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:06,356 INFO L124 PetriNetUnfolderBase]: 4293/6538 cut-off events. [2024-06-04 15:04:06,356 INFO L125 PetriNetUnfolderBase]: For 2294277/2294277 co-relation queries the response was YES. [2024-06-04 15:04:06,443 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. [2024-06-04 15:04:06,470 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 536 selfloop transitions, 79 changer transitions 0/618 dead transitions. [2024-06-04 15:04:06,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 618 transitions, 7581 flow [2024-06-04 15:04:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-04 15:04:06,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-04 15:04:06,471 INFO L175 Difference]: Start difference. First operand has 469 places, 591 transitions, 6221 flow. Second operand 9 states and 142 transitions. [2024-06-04 15:04:06,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 618 transitions, 7581 flow [2024-06-04 15:04:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 618 transitions, 7458 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-04 15:04:13,529 INFO L231 Difference]: Finished difference. Result has 475 places, 595 transitions, 6333 flow [2024-06-04 15:04:13,529 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} [2024-06-04 15:04:13,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 15:04:13,530 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 595 transitions, 6333 flow [2024-06-04 15:04:13,530 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) [2024-06-04 15:04:13,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:13,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:04:13,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 15:04:13,530 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)] === [2024-06-04 15:04:13,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash 803690028, now seen corresponding path program 3 times [2024-06-04 15:04:13,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213542423] [2024-06-04 15:04:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:13,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:14,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:14,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213542423] [2024-06-04 15:04:14,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213542423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:14,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:14,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:14,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512532620] [2024-06-04 15:04:14,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:14,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:14,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:14,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:14,436 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) [2024-06-04 15:04:14,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:14,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:14,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:16,251 INFO L124 PetriNetUnfolderBase]: 4303/6552 cut-off events. [2024-06-04 15:04:16,251 INFO L125 PetriNetUnfolderBase]: For 2322085/2322085 co-relation queries the response was YES. [2024-06-04 15:04:16,343 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. [2024-06-04 15:04:16,373 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 535 selfloop transitions, 84 changer transitions 0/622 dead transitions. [2024-06-04 15:04:16,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 622 transitions, 7672 flow [2024-06-04 15:04:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:04:16,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-04 15:04:16,374 INFO L175 Difference]: Start difference. First operand has 475 places, 595 transitions, 6333 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:04:16,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 622 transitions, 7672 flow [2024-06-04 15:04:23,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 622 transitions, 7502 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:04:23,961 INFO L231 Difference]: Finished difference. Result has 478 places, 598 transitions, 6375 flow [2024-06-04 15:04:23,962 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} [2024-06-04 15:04:23,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-04 15:04:23,962 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 598 transitions, 6375 flow [2024-06-04 15:04:23,962 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) [2024-06-04 15:04:23,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:23,962 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] [2024-06-04 15:04:23,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 15:04:23,963 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)] === [2024-06-04 15:04:23,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1981498914, now seen corresponding path program 3 times [2024-06-04 15:04:23,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:23,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131474646] [2024-06-04 15:04:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:23,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:24,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131474646] [2024-06-04 15:04:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131474646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:24,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:24,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:24,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824320020] [2024-06-04 15:04:24,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:24,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:24,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:24,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:24,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:24,874 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) [2024-06-04 15:04:24,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:24,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:24,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:26,647 INFO L124 PetriNetUnfolderBase]: 4313/6566 cut-off events. [2024-06-04 15:04:26,648 INFO L125 PetriNetUnfolderBase]: For 2351778/2351778 co-relation queries the response was YES. [2024-06-04 15:04:26,749 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. [2024-06-04 15:04:26,973 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 46 changer transitions 0/625 dead transitions. [2024-06-04 15:04:26,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 625 transitions, 7762 flow [2024-06-04 15:04:26,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-04 15:04:26,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-04 15:04:26,974 INFO L175 Difference]: Start difference. First operand has 478 places, 598 transitions, 6375 flow. Second operand 9 states and 140 transitions. [2024-06-04 15:04:26,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 625 transitions, 7762 flow [2024-06-04 15:04:34,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 625 transitions, 7578 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 15:04:34,040 INFO L231 Difference]: Finished difference. Result has 480 places, 601 transitions, 6369 flow [2024-06-04 15:04:34,041 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} [2024-06-04 15:04:34,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-04 15:04:34,041 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 601 transitions, 6369 flow [2024-06-04 15:04:34,041 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) [2024-06-04 15:04:34,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:34,041 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] [2024-06-04 15:04:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 15:04:34,042 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)] === [2024-06-04 15:04:34,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1068614680, now seen corresponding path program 1 times [2024-06-04 15:04:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:34,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279540571] [2024-06-04 15:04:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279540571] [2024-06-04 15:04:34,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279540571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:34,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:34,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617792729] [2024-06-04 15:04:34,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:35,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:35,086 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) [2024-06-04 15:04:35,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:35,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:36,955 INFO L124 PetriNetUnfolderBase]: 4321/6578 cut-off events. [2024-06-04 15:04:36,955 INFO L125 PetriNetUnfolderBase]: For 2381210/2381210 co-relation queries the response was YES. [2024-06-04 15:04:37,047 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. [2024-06-04 15:04:37,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 552 selfloop transitions, 79 changer transitions 0/634 dead transitions. [2024-06-04 15:04:37,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 634 transitions, 8104 flow [2024-06-04 15:04:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:37,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:04:37,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:04:37,078 INFO L175 Difference]: Start difference. First operand has 480 places, 601 transitions, 6369 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:04:37,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 634 transitions, 8104 flow [2024-06-04 15:04:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 634 transitions, 7954 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 15:04:44,556 INFO L231 Difference]: Finished difference. Result has 482 places, 605 transitions, 6466 flow [2024-06-04 15:04:44,557 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} [2024-06-04 15:04:44,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-04 15:04:44,557 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 605 transitions, 6466 flow [2024-06-04 15:04:44,557 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) [2024-06-04 15:04:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:44,557 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] [2024-06-04 15:04:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 15:04:44,557 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)] === [2024-06-04 15:04:44,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1061205370, now seen corresponding path program 2 times [2024-06-04 15:04:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:44,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050709055] [2024-06-04 15:04:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:45,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050709055] [2024-06-04 15:04:45,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050709055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:45,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:45,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713794682] [2024-06-04 15:04:45,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:45,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:45,607 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) [2024-06-04 15:04:45,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:45,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:45,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:47,371 INFO L124 PetriNetUnfolderBase]: 4342/6609 cut-off events. [2024-06-04 15:04:47,371 INFO L125 PetriNetUnfolderBase]: For 2437199/2437199 co-relation queries the response was YES. [2024-06-04 15:04:47,466 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. [2024-06-04 15:04:47,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 555 selfloop transitions, 76 changer transitions 0/634 dead transitions. [2024-06-04 15:04:47,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 634 transitions, 8201 flow [2024-06-04 15:04:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-04 15:04:47,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-04 15:04:47,497 INFO L175 Difference]: Start difference. First operand has 482 places, 605 transitions, 6466 flow. Second operand 9 states and 145 transitions. [2024-06-04 15:04:47,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 634 transitions, 8201 flow [2024-06-04 15:04:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 634 transitions, 8023 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-04 15:04:55,040 INFO L231 Difference]: Finished difference. Result has 486 places, 609 transitions, 6537 flow [2024-06-04 15:04:55,040 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} [2024-06-04 15:04:55,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-04 15:04:55,041 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 609 transitions, 6537 flow [2024-06-04 15:04:55,041 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) [2024-06-04 15:04:55,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:04:55,041 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] [2024-06-04 15:04:55,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 15:04:55,041 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)] === [2024-06-04 15:04:55,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:04:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1061196070, now seen corresponding path program 3 times [2024-06-04 15:04:55,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:04:55,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094497140] [2024-06-04 15:04:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:04:55,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:04:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:04:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:04:56,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:04:56,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094497140] [2024-06-04 15:04:56,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094497140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:04:56,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:04:56,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:04:56,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508085932] [2024-06-04 15:04:56,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:04:56,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:04:56,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:04:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:04:56,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:04:56,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:04:56,158 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) [2024-06-04 15:04:56,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:04:56,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:04:56,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:04:58,310 INFO L124 PetriNetUnfolderBase]: 4337/6602 cut-off events. [2024-06-04 15:04:58,310 INFO L125 PetriNetUnfolderBase]: For 2440379/2440379 co-relation queries the response was YES. [2024-06-04 15:04:58,388 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. [2024-06-04 15:04:58,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 555 selfloop transitions, 74 changer transitions 0/632 dead transitions. [2024-06-04 15:04:58,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 632 transitions, 7858 flow [2024-06-04 15:04:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:04:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:04:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:04:58,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-04 15:04:58,414 INFO L175 Difference]: Start difference. First operand has 486 places, 609 transitions, 6537 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:04:58,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 632 transitions, 7858 flow [2024-06-04 15:05:06,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 632 transitions, 7745 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:05:06,197 INFO L231 Difference]: Finished difference. Result has 490 places, 609 transitions, 6577 flow [2024-06-04 15:05:06,197 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} [2024-06-04 15:05:06,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-04 15:05:06,203 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 609 transitions, 6577 flow [2024-06-04 15:05:06,203 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) [2024-06-04 15:05:06,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:06,204 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] [2024-06-04 15:05:06,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 15:05:06,204 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)] === [2024-06-04 15:05:06,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1701017846, now seen corresponding path program 4 times [2024-06-04 15:05:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815511435] [2024-06-04 15:05:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:06,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:07,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815511435] [2024-06-04 15:05:07,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815511435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:07,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:07,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:05:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850835332] [2024-06-04 15:05:07,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:07,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:05:07,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:05:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:05:07,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:05:07,253 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) [2024-06-04 15:05:07,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:07,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:05:07,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:09,135 INFO L124 PetriNetUnfolderBase]: 4347/6616 cut-off events. [2024-06-04 15:05:09,135 INFO L125 PetriNetUnfolderBase]: For 2471304/2471304 co-relation queries the response was YES. [2024-06-04 15:05:09,226 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. [2024-06-04 15:05:09,256 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 591 selfloop transitions, 47 changer transitions 0/641 dead transitions. [2024-06-04 15:05:09,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 641 transitions, 8041 flow [2024-06-04 15:05:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:05:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:05:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-04 15:05:09,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-04 15:05:09,257 INFO L175 Difference]: Start difference. First operand has 490 places, 609 transitions, 6577 flow. Second operand 9 states and 148 transitions. [2024-06-04 15:05:09,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 641 transitions, 8041 flow [2024-06-04 15:05:19,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 641 transitions, 7888 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 15:05:19,447 INFO L231 Difference]: Finished difference. Result has 491 places, 612 transitions, 6638 flow [2024-06-04 15:05:19,447 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} [2024-06-04 15:05:19,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-04 15:05:19,447 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 612 transitions, 6638 flow [2024-06-04 15:05:19,447 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) [2024-06-04 15:05:19,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:19,448 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] [2024-06-04 15:05:19,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 15:05:19,448 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)] === [2024-06-04 15:05:19,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1415395836, now seen corresponding path program 5 times [2024-06-04 15:05:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:19,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213129557] [2024-06-04 15:05:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:20,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:20,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213129557] [2024-06-04 15:05:20,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213129557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:20,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:20,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:05:20,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115476628] [2024-06-04 15:05:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:05:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:05:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:05:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:05:20,469 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) [2024-06-04 15:05:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:05:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:22,392 INFO L124 PetriNetUnfolderBase]: 4882/7383 cut-off events. [2024-06-04 15:05:22,393 INFO L125 PetriNetUnfolderBase]: For 2715557/2715557 co-relation queries the response was YES. [2024-06-04 15:05:22,500 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. [2024-06-04 15:05:22,535 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 637 selfloop transitions, 135 changer transitions 0/775 dead transitions. [2024-06-04 15:05:22,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 775 transitions, 11380 flow [2024-06-04 15:05:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:05:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:05:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-04 15:05:22,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-04 15:05:22,537 INFO L175 Difference]: Start difference. First operand has 491 places, 612 transitions, 6638 flow. Second operand 10 states and 166 transitions. [2024-06-04 15:05:22,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 775 transitions, 11380 flow [2024-06-04 15:05:29,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 775 transitions, 10984 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-04 15:05:29,766 INFO L231 Difference]: Finished difference. Result has 497 places, 705 transitions, 8441 flow [2024-06-04 15:05:29,766 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} [2024-06-04 15:05:29,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-04 15:05:29,767 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 705 transitions, 8441 flow [2024-06-04 15:05:29,767 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) [2024-06-04 15:05:29,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:29,767 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] [2024-06-04 15:05:29,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 15:05:29,767 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)] === [2024-06-04 15:05:29,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:29,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1415396022, now seen corresponding path program 4 times [2024-06-04 15:05:29,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:29,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230831299] [2024-06-04 15:05:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:29,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:30,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:30,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230831299] [2024-06-04 15:05:30,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230831299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:30,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:30,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:05:30,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527548186] [2024-06-04 15:05:30,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:30,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:05:30,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:05:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:05:30,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:05:30,737 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) [2024-06-04 15:05:30,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:30,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:05:30,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:32,997 INFO L124 PetriNetUnfolderBase]: 4916/7430 cut-off events. [2024-06-04 15:05:32,997 INFO L125 PetriNetUnfolderBase]: For 2795329/2795329 co-relation queries the response was YES. [2024-06-04 15:05:33,104 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. [2024-06-04 15:05:33,139 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 569 selfloop transitions, 170 changer transitions 0/742 dead transitions. [2024-06-04 15:05:33,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 742 transitions, 10833 flow [2024-06-04 15:05:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:05:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:05:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:05:33,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 15:05:33,141 INFO L175 Difference]: Start difference. First operand has 497 places, 705 transitions, 8441 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:05:33,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 742 transitions, 10833 flow [2024-06-04 15:05:42,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 742 transitions, 10579 flow, removed 124 selfloop flow, removed 2 redundant places. [2024-06-04 15:05:42,941 INFO L231 Difference]: Finished difference. Result has 504 places, 714 transitions, 8726 flow [2024-06-04 15:05:42,942 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} [2024-06-04 15:05:42,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-04 15:05:42,942 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 714 transitions, 8726 flow [2024-06-04 15:05:42,942 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) [2024-06-04 15:05:42,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:42,942 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] [2024-06-04 15:05:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 15:05:42,943 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)] === [2024-06-04 15:05:42,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1420638246, now seen corresponding path program 6 times [2024-06-04 15:05:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858336049] [2024-06-04 15:05:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:43,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:43,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858336049] [2024-06-04 15:05:43,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858336049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:43,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:43,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:05:43,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599551283] [2024-06-04 15:05:43,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:43,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:05:43,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:43,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:05:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:05:43,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:05:43,982 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) [2024-06-04 15:05:43,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:43,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:05:43,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:05:46,885 INFO L124 PetriNetUnfolderBase]: 5052/7618 cut-off events. [2024-06-04 15:05:46,886 INFO L125 PetriNetUnfolderBase]: For 3077513/3077513 co-relation queries the response was YES. [2024-06-04 15:05:46,988 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. [2024-06-04 15:05:47,026 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 664 selfloop transitions, 104 changer transitions 0/771 dead transitions. [2024-06-04 15:05:47,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 771 transitions, 11726 flow [2024-06-04 15:05:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:05:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:05:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-04 15:05:47,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-04 15:05:47,028 INFO L175 Difference]: Start difference. First operand has 504 places, 714 transitions, 8726 flow. Second operand 11 states and 177 transitions. [2024-06-04 15:05:47,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 771 transitions, 11726 flow [2024-06-04 15:05:57,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 771 transitions, 11452 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-04 15:05:57,460 INFO L231 Difference]: Finished difference. Result has 513 places, 734 transitions, 9367 flow [2024-06-04 15:05:57,460 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} [2024-06-04 15:05:57,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-04 15:05:57,460 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 734 transitions, 9367 flow [2024-06-04 15:05:57,461 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) [2024-06-04 15:05:57,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:05:57,461 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] [2024-06-04 15:05:57,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 15:05:57,461 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)] === [2024-06-04 15:05:57,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:05:57,461 INFO L85 PathProgramCache]: Analyzing trace with hash 912726979, now seen corresponding path program 1 times [2024-06-04 15:05:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:05:57,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941386965] [2024-06-04 15:05:57,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:05:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:05:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:05:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:05:58,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:05:58,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941386965] [2024-06-04 15:05:58,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941386965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:05:58,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:05:58,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:05:58,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133276473] [2024-06-04 15:05:58,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:05:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:05:58,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:05:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:05:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:05:58,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:05:58,957 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) [2024-06-04 15:05:58,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:05:58,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:05:58,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:01,730 INFO L124 PetriNetUnfolderBase]: 5046/7606 cut-off events. [2024-06-04 15:06:01,731 INFO L125 PetriNetUnfolderBase]: For 3014376/3014384 co-relation queries the response was YES. [2024-06-04 15:06:01,835 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. [2024-06-04 15:06:01,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 728 selfloop transitions, 34 changer transitions 0/765 dead transitions. [2024-06-04 15:06:01,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 765 transitions, 11097 flow [2024-06-04 15:06:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 15:06:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 15:06:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-04 15:06:01,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-04 15:06:01,873 INFO L175 Difference]: Start difference. First operand has 513 places, 734 transitions, 9367 flow. Second operand 10 states and 148 transitions. [2024-06-04 15:06:01,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 765 transitions, 11097 flow [2024-06-04 15:06:10,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 765 transitions, 10702 flow, removed 154 selfloop flow, removed 6 redundant places. [2024-06-04 15:06:10,498 INFO L231 Difference]: Finished difference. Result has 517 places, 738 transitions, 9190 flow [2024-06-04 15:06:10,499 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} [2024-06-04 15:06:10,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-04 15:06:10,499 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 738 transitions, 9190 flow [2024-06-04 15:06:10,499 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) [2024-06-04 15:06:10,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:10,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:06:10,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 15:06:10,500 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)] === [2024-06-04 15:06:10,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:10,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1695356564, now seen corresponding path program 1 times [2024-06-04 15:06:10,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:10,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148349535] [2024-06-04 15:06:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:10,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148349535] [2024-06-04 15:06:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148349535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:11,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:11,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134116103] [2024-06-04 15:06:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:11,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:06:11,556 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) [2024-06-04 15:06:11,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:11,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:06:11,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:14,099 INFO L124 PetriNetUnfolderBase]: 5051/7613 cut-off events. [2024-06-04 15:06:14,099 INFO L125 PetriNetUnfolderBase]: For 3025414/3025422 co-relation queries the response was YES. [2024-06-04 15:06:14,209 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. [2024-06-04 15:06:14,360 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 735 selfloop transitions, 26 changer transitions 0/764 dead transitions. [2024-06-04 15:06:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 764 transitions, 10876 flow [2024-06-04 15:06:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-04 15:06:14,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3544973544973545 [2024-06-04 15:06:14,361 INFO L175 Difference]: Start difference. First operand has 517 places, 738 transitions, 9190 flow. Second operand 9 states and 134 transitions. [2024-06-04 15:06:14,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 764 transitions, 10876 flow [2024-06-04 15:06:23,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 764 transitions, 10714 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:23,432 INFO L231 Difference]: Finished difference. Result has 518 places, 741 transitions, 9193 flow [2024-06-04 15:06:23,432 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} [2024-06-04 15:06:23,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-04 15:06:23,433 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 741 transitions, 9193 flow [2024-06-04 15:06:23,433 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) [2024-06-04 15:06:23,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:23,433 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] [2024-06-04 15:06:23,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 15:06:23,433 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)] === [2024-06-04 15:06:23,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1695356936, now seen corresponding path program 7 times [2024-06-04 15:06:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:23,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018103369] [2024-06-04 15:06:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:24,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:24,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018103369] [2024-06-04 15:06:24,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018103369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:24,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:24,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734519661] [2024-06-04 15:06:24,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:24,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:24,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:06:24,421 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) [2024-06-04 15:06:24,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:24,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:06:24,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:27,099 INFO L124 PetriNetUnfolderBase]: 5027/7585 cut-off events. [2024-06-04 15:06:27,099 INFO L125 PetriNetUnfolderBase]: For 3049731/3049731 co-relation queries the response was YES. [2024-06-04 15:06:27,197 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. [2024-06-04 15:06:27,227 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 667 selfloop transitions, 100 changer transitions 0/770 dead transitions. [2024-06-04 15:06:27,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 770 transitions, 11231 flow [2024-06-04 15:06:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:27,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-04 15:06:27,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-04 15:06:27,229 INFO L175 Difference]: Start difference. First operand has 518 places, 741 transitions, 9193 flow. Second operand 9 states and 147 transitions. [2024-06-04 15:06:27,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 770 transitions, 11231 flow [2024-06-04 15:06:36,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 770 transitions, 10946 flow, removed 119 selfloop flow, removed 7 redundant places. [2024-06-04 15:06:36,694 INFO L231 Difference]: Finished difference. Result has 520 places, 741 transitions, 9122 flow [2024-06-04 15:06:36,694 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} [2024-06-04 15:06:36,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-04 15:06:36,694 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 741 transitions, 9122 flow [2024-06-04 15:06:36,694 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) [2024-06-04 15:06:36,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:36,695 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] [2024-06-04 15:06:36,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 15:06:36,695 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)] === [2024-06-04 15:06:36,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1424650266, now seen corresponding path program 8 times [2024-06-04 15:06:36,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:36,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085583064] [2024-06-04 15:06:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:36,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:37,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:37,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085583064] [2024-06-04 15:06:37,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085583064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:37,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:37,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:37,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138033529] [2024-06-04 15:06:37,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:06:37,670 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) [2024-06-04 15:06:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:37,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:06:37,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:40,545 INFO L124 PetriNetUnfolderBase]: 5223/7855 cut-off events. [2024-06-04 15:06:40,545 INFO L125 PetriNetUnfolderBase]: For 3348547/3348547 co-relation queries the response was YES. [2024-06-04 15:06:40,666 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. [2024-06-04 15:06:40,701 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 565 selfloop transitions, 228 changer transitions 0/796 dead transitions. [2024-06-04 15:06:40,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 796 transitions, 12812 flow [2024-06-04 15:06:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-04 15:06:40,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-04 15:06:40,703 INFO L175 Difference]: Start difference. First operand has 520 places, 741 transitions, 9122 flow. Second operand 9 states and 151 transitions. [2024-06-04 15:06:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 796 transitions, 12812 flow [2024-06-04 15:06:52,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 796 transitions, 12612 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 15:06:52,475 INFO L231 Difference]: Finished difference. Result has 523 places, 766 transitions, 10360 flow [2024-06-04 15:06:52,475 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} [2024-06-04 15:06:52,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-04 15:06:52,476 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 766 transitions, 10360 flow [2024-06-04 15:06:52,476 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) [2024-06-04 15:06:52,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:06:52,476 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] [2024-06-04 15:06:52,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 15:06:52,476 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)] === [2024-06-04 15:06:52,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:06:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1424650452, now seen corresponding path program 5 times [2024-06-04 15:06:52,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:06:52,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890633090] [2024-06-04 15:06:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:06:52,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:06:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:06:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:06:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:06:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890633090] [2024-06-04 15:06:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890633090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:06:53,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:06:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:06:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107716384] [2024-06-04 15:06:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:06:53,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:06:53,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:06:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:06:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:06:53,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:06:53,446 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) [2024-06-04 15:06:53,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:06:53,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:06:53,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:06:56,140 INFO L124 PetriNetUnfolderBase]: 5257/7902 cut-off events. [2024-06-04 15:06:56,140 INFO L125 PetriNetUnfolderBase]: For 3417102/3417102 co-relation queries the response was YES. [2024-06-04 15:06:56,247 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. [2024-06-04 15:06:56,281 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 626 selfloop transitions, 172 changer transitions 0/801 dead transitions. [2024-06-04 15:06:56,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 801 transitions, 13138 flow [2024-06-04 15:06:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:06:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:06:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-04 15:06:56,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-04 15:06:56,283 INFO L175 Difference]: Start difference. First operand has 523 places, 766 transitions, 10360 flow. Second operand 9 states and 150 transitions. [2024-06-04 15:06:56,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 801 transitions, 13138 flow [2024-06-04 15:07:06,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 801 transitions, 12762 flow, removed 162 selfloop flow, removed 3 redundant places. [2024-06-04 15:07:06,788 INFO L231 Difference]: Finished difference. Result has 529 places, 775 transitions, 10433 flow [2024-06-04 15:07:06,789 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} [2024-06-04 15:07:06,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 486 predicate places. [2024-06-04 15:07:06,789 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 775 transitions, 10433 flow [2024-06-04 15:07:06,789 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) [2024-06-04 15:07:06,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:07:06,790 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] [2024-06-04 15:07:06,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 15:07:06,790 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)] === [2024-06-04 15:07:06,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:07:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1691637494, now seen corresponding path program 2 times [2024-06-04 15:07:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:07:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186978071] [2024-06-04 15:07:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:07:06,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:07:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:07:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:07:07,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:07:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186978071] [2024-06-04 15:07:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186978071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:07:07,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:07:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 15:07:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332776605] [2024-06-04 15:07:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:07:07,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 15:07:07,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:07:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 15:07:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 15:07:07,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-04 15:07:07,660 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) [2024-06-04 15:07:07,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:07:07,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-04 15:07:07,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:07:10,168 INFO L124 PetriNetUnfolderBase]: 5278/7927 cut-off events. [2024-06-04 15:07:10,168 INFO L125 PetriNetUnfolderBase]: For 3457219/3457227 co-relation queries the response was YES. [2024-06-04 15:07:10,283 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. [2024-06-04 15:07:10,319 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 725 selfloop transitions, 78 changer transitions 0/806 dead transitions. [2024-06-04 15:07:10,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 806 transitions, 13115 flow [2024-06-04 15:07:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:07:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:07:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-04 15:07:10,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-04 15:07:10,321 INFO L175 Difference]: Start difference. First operand has 529 places, 775 transitions, 10433 flow. Second operand 9 states and 143 transitions. [2024-06-04 15:07:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 806 transitions, 13115 flow Killed by 15